CPM Enhancement for Airbag and Extended Features. Outline
|
|
- Austen Spencer
- 5 years ago
- Views:
Transcription
1 CPM Enhancement for Airbag and Extended Features 7/2015 Jason Wang Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 1 Outline New Features *AIRBAG_PARTICLE_MOLEFRACTION *SENSOR_CPM_AIRBAG Initial AIR options Fabric porous leakages Vent options Pushout vent Error detection Smoothing with force decay constant Conclusions Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 2 1
2 *AIRBAG_PARTICLE_MOLEFRACTION Convert input from mass ratio to volume ratio Additional card is needed to provide total mass flowrate curve LCMi is normally used as mass flowrate curve. If this option is on, LCMi will be treated as molar fraction curve. Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 3 *AIRBAG_PARTICLE_MOLEFRACTION *AIRBAG_PARTICLE_ID_MOLEFRACTION E E E E E $ extra line for total mass flow rate 2 $ LCMi E E E-6 0 LCMi will be treated as molar fraction curve. Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 4 2
3 *SENSOR_CPM_AIRBAG The new keyword will link *AIRBAG_PARTICLE and *SENSOR_SWITCH to activate CPM bag based by predefined signal *SENSOR_SWITCH 1000 SENSOR 200 LT E-10 *SENSOR_DEFINE_FORCE 200 CONTACT Z 0 *AIRBAG_PARTICLE_ID *SENSOR_CPM_AIRBAG $ CPMID SWITID TBIRTH TDEATH TDR FDEFPS RBPID $ Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 5 *SENSOR_CPM_AIRBAG Automatically shift all time dependent curves used in *AIRBAG_PARTICLE *MAT_FABRIC used in this bag Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 6 3
4 IAIR P_ATM (load seg) Initial AIR options P2F (inflator particles) 0 0 P_col 0 P_AIR On each segment 1 P_ATM P_col UP, f(vbag,tbag) (load seg) 2 P_ATM P_col NP_RELAX>0 NP_RELAX<0 P_AIR (load seg) P_col P_AIR (load seg) If activated P_col P_col : pressure from particle s impulse Load seg: pressure load applies to the segment IAIR P_ATM (load seg) IAIR=-1 and IAIR=4 P2F (inflator particles) 0 0 P_col 0 P_AIR On each segment 1 P_ATM P_col UP, f(vbag,tbag) (load seg) -1 P_ATM P_col UP, f(vbag,tbag) (load seg) Intake ambient air if P_ATM>P_bag 2 P_ATM P_col NP_RELAX>0 NP_RELAX<0 P_AIR (load seg) P_col P_AIR (load seg) If activated P_col 4 P_ATM P_col Store the ratio of Ncol_air µ = Ncol air + Ncol_infl f(µ*p_air) (load seg) P_col : pressure from particle s impulse Load seg: pressure load applies to the segment 4
5 IAIR = -1 At the beginning of the bag inflating, the bag pressure may go under ambient pressure due to jetting. When set IAIR=-1, it will allow external vents to intake outside air. The intake air is treated as part of UP air and will apply pressure to all surface of the bag. This feature does not work with chamber definition. Implemented only in development after revision IAIR = -1 External Vent IAIR=1 IAIR=-1 5
6 IAIR = -1 Vent mass IAIR=1 IAIR=-1 Intake air from ambient IAIR = 4 General problem - It is observed from several Airbag Suppliers that tight rolled curtain airbags unfold much slower than in tests. IAIR=1: The far end of the bag will be collapsed due to vacuum created by the UP air. This will make the bag very hard to deploy in this case. IAIR=2: The air particle in the rolled section interact with the inflator particles which causes the rolled section inflated too early. The rolled section becomes very sticky and deploys even slower. 6
7 IAIR = 4 By looking at one of the flat bag example, it is seen a round gas front moving forward with iair=1 and 2. Insufficient gas collision at gas front. Not enough gas particle get between layers which cannot provide positive pressure difference against p_atm. The flat region is very easy collapsed at the gas front which prevents particles getting between the tip. The bag can only open due the trailing segments get enough pressure to push the leading segments to open. This maybe the main reason of delay. Round gas front P_atm tip collapsed due to negative pressure (not enough inflator gas collision) IAIR = 4 Existing CPM features cannot handle this type of application IAIR=4 stores number of collisions from resident air and inflator particle and uses this numbers to track inflator gas front and rolled region. Inflator particle does not transfers energy to resident air particle to prevent prematurely deploying rolled region. The energy of initial air needs to be very small compared with incoming energy This feature does not support chamber definition IAIR=4 is not a replacement of IAIR=2. Implement in R7.1.2, R8.0 and development after revision
8 Chambers Chamber 8,9 5 and 4 fills to slowly compared with test. Also they show large fluctuations in pressure during filling which is most obvious in chamber 9. Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 15 Instances in time (20ms) IAIR=2 IAIR=4 Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 16 8
9 Instances in time (35ms) IAIR=2 IAIR=4 Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 17 Instances in time (42.5ms) IAIR=2 IAIR=4 Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 18 9
10 Pressure in chamber 8 and 9 (IAIR=2) Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 19 Animations Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp
11 Pressure in chamber 8 and 9 Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp. 21 Fabric Porosity Leakage m ((1 ELA) unblk porous, c ELA) coeffa c seg mass flow rate of component c Effective non-blocked factor local density of gas component c Effective area of fabric segment coeff can be one of the following Regular Autoliv coeff FAC Anagonye and Wang coeff X 0 X v _ leak coeff Autoliv _ factorfac 1 r X 2 X coeff f ( rs ) f ( rp ), X 0 1 s FLC r p leakage velocity and area coefficient from *MAT_FABRIC v _ leak 3 r r s p FLC 11
12 Comparison of different External Vent Enhance Venting No Chamber Chambers 0 P_bag > P_atm (1,3) P_chm > P_atm (1,3) 1 P_bag > P_atm (1,2,3) P_chm > P_atm (1,2,3) 1. Mass Flow rate from Wang and Nefske equation Q = p atm p bag Q crit = 2 γ + 1 γ γ 1 Q = max (Q crit, Q) p 1 γr m 23 = C 23 A 23 Q γ 2g c R T 2 γ 1 γ 1 1 Q γ Vent s characteristic length l = A vent 2. ENH_V=1. Particles within l are moved toward vent s geometric center to get better probability function 3. IRPD=1. The radius of particles within 2*l are increased Vent 1. Multiple vents - each part is a separate vent with enhv=1 2. Vent characteristic length l = A vent 12
13 Comparison of different Internal Vent Enhance Venting No Chamber Chm Pre Chambers Part pre 0 (1) 1 (3) (1,2,3) 2 Particles move both ways Particles move one way Moving particles for ENV_H and IRPD is only applied to the high pressure side. In the case of no chamber definition, the high pressure side is determined by a special treatment. Internal vent P1 > P2 Vent Chamber #1 Chamber #2 P1 always greater than P2 This section of tube will collapse Vent based on part pressure 13
14 Other vent options 1. Directional vent (not recommended) 2. One way vent Particles on high pressure side within range of 4*l will be moved toward vent center for both 1 and Compress sealed vent A vent = max (Acurrent Aorigin, 0) 4. Push-out vent (external vent only) Particle remains active while going through vent within 2*l Push-out vent 1. Only work with external vents through *DEFINE_CPM_VENT 2. Particle remains active while going through vent within 2*l 3. Internal part slides out from this external vent will only experience the particle impact force. 4. Bag closed volume is defined by the external vent NOT considering the extruded internal parts. 5. Active particle outside the vent will not be counted in the bag status calculation. However, it can go back through the same vent and be part of the bag gas again. 6. Only available in development source after revision
15 Push-out vent Internal Parts External Vent With push-out vent option Regular external vent Push-out vent With push-out vent Without push-out vent Pressure of internal part 5 15
16 Extensive Input Error Checking Please get latest development exe. *MAT_FABRIC Error terminate if FVOPT=1,2,3,4,5,6 *CONTROL_CPM SFFDC : Scale factor of force decay constant (Default=1.0) Allowable arrange 0.01 to 100. (dev 97346) Particle impact force is gradually applied to airbag segment by a special smoothing function with the following form. F apply = 1 e dt SFFDC τ Fcurrent + F stored Where τ is the force decay constant stored in LS-DYNA. SFFDC=
17 Conclusions Please check IAIR setup Please check vent definitions, enhv, irpd, one/bidirectional vent, etc Please send us suggestion/request to document feature in better way Please send us example to show the problem. We will try to implement new feature to solve your problem Thanks Copyright 2013 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATION DEM H-Bondp
Evaluation of LS-DYNA Corpuscular Particle Method for Side Impact Airbag Deployment Applications
13 th International LS-DYNA Users Conference Session: Fluid Structure Interaction Evaluation of LS-DYNA Corpuscular Particle Method for Side Impact Airbag Deployment Applications Chin-Hsu Lin, Yi-Pen Cheng
More informationInvestigation of the Early Inflation Characteristics of a Complex Folded Knee Airbag with the New Corpuscular Method in LS-DYNA
6. LS-DYNA Anwenderforum, Frankenthal 2007 Passive Sicherheit III Investigation of the Early Inflation Characteristics of a Complex Folded Knee Airbag with the New Corpuscular Method in LS-DYNA M. Freisinger
More informationExample 4 - Airbag. Summary
Example 4 - Airbag Summary This example deals with the deployment of a chambered airbag modeled by monitored volumes using communications. The airbag is initially folded along four fold lines. The fabric
More informationEvaluation of LS-DYNA Corpuscular Particle Method Passenger Airbag Applications
Evaluation of LS-DYNA Corpuscular Particle Method Passenger Airbag Applications Chin-Hsu Lin and Yi-Pen Cheng General Motors Abstract A uniform pressure method, i.e. no pressure variation on bag surface
More informationPAB Deployment Simulation with Curved Retainer
7 th International LS-DYNA Users Conference Crash/Safety (3) PAB Deployment Simulation with Curved Retainer Linhuo Shi TG North America Corporation 095 Crooks Road Troy, MI 48084 Tel: (248) 280-7348 Fax:
More informationKyoung-Su Im, Z.-C Zhang, and Grant Cook, Jr. LSTC, Livermore, CA USA. 06/14/2016, Dearborn, MI
Kyoung-Su Im, Z.-C Zhang, and Grant Cook, Jr. LSTC, Livermore, CA 94551 USA 06/14/2016, Dearborn, MI New Inflator Models! Inflator models In LS-DYNA: Pyrotechnic inflator (PI) model. Hybrid cold flow model
More informationSucceeding with Production Air Leak Testing Methods. Paul Chamberlain President, CEO
Succeeding with Production Air Leak Testing Methods Paul Chamberlain President, CEO 2 Overview Air Leak Testing Overview Pressure Decay Air Leak Testing Factors impacting leak rate measurement Test Data:
More informationExercise 2-2. Second-Order Interacting Processes EXERCISE OBJECTIVE DISCUSSION OUTLINE. The actual setup DISCUSSION
Exercise 2-2 Second-Order Interacting Processes EXERCISE OBJECTIVE Familiarize yourself with second-order interacting processes and experiment with the finer points of controller tuning to gain a deeper
More informationFigure 1 Schematic of opposing air bearing concept
Theoretical Analysis of Opposing Air Bearing Concept This concept utilizes air bearings to constrain five degrees of freedom of the optic as shown in the figure below. Three pairs of inherently compensated
More informationLECTURE 5 TRAVELING WAVES. Instructor: Kazumi Tolich
LECTURE 5 TRAVELING WAVES Instructor: Kazumi Tolich Lecture 5 2 15.1 The wave model Mechanical waves Electromagnetic and matter waves The transverse and longitudinal waves Traveling waves Waves on a string
More informationEF 151 Exam #3, Spring, 2015 Page 1 of 5
EF 151 Exam #3, Spring, 2015 Page 1 of 5 Name: Section: Instructions: Put name and section on exam and on equation sheet. Do not open the test until you are told to do so. Write your final answer in the
More informationHKA TECHNOLOGIES INC. TEMPERATURE COMPENSATION
HKA TECHNOLOGIES INC. TEMPERATURE COMPENSATION Different Methods of Air Leak Testing Conventional vs Bell Jar Pressure Decay and Differential Pressure Decay Mass Flow and Differential Mass Flow HKA mainly
More informationCubeSat Balloon Drag Devices: Meeting the 25-Year De-Orbit Requirement
CubeSat Balloon Drag Devices: Meeting the 25-Year De-Orbit Requirement Jerry K. Fuller, David Hinkley, and Siegfried W. Janson The Aerospace Corporation Physical Science Laboratories August, 2010 The Aerospace
More informationYou should be able to: Describe Equipment Barometer Manometer. 5.1 Pressure Read and outline 5.1 Define Barometer
A P CHEMISTRY - Unit 5: Gases Unit 5: Gases Gases are distinguished from other forms of matter, not only by their power of indefinite expansion so as to fill any vessel, however large, and by the great
More informationWorkshop 1: Bubbly Flow in a Rectangular Bubble Column. Multiphase Flow Modeling In ANSYS CFX Release ANSYS, Inc. WS1-1 Release 14.
Workshop 1: Bubbly Flow in a Rectangular Bubble Column 14. 5 Release Multiphase Flow Modeling In ANSYS CFX 2013 ANSYS, Inc. WS1-1 Release 14.5 Introduction This workshop models the dispersion of air bubbles
More informationLOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/12
LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/ This experiment will introduce you to the kinetic properties of low-pressure gases. You will make observations on the rates with which selected
More informationConstant-Volume Process
Constant-Volume Process A constant-volume process is called an isochoric process. Consider the gas in a closed, rigid container. Warming the gas with a flame will raise its pressure without changing its
More information67. Sectional normalization and recognization on the PV-Diagram of reciprocating compressor
67. Sectional normalization and recognization on the PV-Diagram of reciprocating compressor Jin-dong Wang 1, Yi-qi Gao 2, Hai-yang Zhao 3, Rui Cong 4 School of Mechanical Science and Engineering, Northeast
More informationThe latest automotive systems require innovative leak test methods and fixturing.
Leak Testing Auto Parts The latest automotive systems require innovative leak test methods and fixturing. In the past, automobile manufacturers only required basic forms of leak testing to check standard
More informationModeling Diffusion Rates of a Gas in an Enclosed Space
Modeling Diffusion Rates of a Gas in an Enclosed Space By: Chirag Kulkarni, Haoran Fei, Henry Friedlander Abstract: This research attempts to identify the relationship between pressure of a certain gas
More informationEnd of Chapter Exercises
End of Chapter Exercises Exercises 1 12 are conceptual questions that are designed to see if you have understood the main concepts of the chapter. 1. While on an airplane, you take a drink from your water
More informationGilbert Kirss Foster. Chapter 10. Properties of Gases The Air We Breathe
Gilbert Kirss Foster Chapter 10 Properties of Gases The Air We Breathe Chapter Outline 10.1 The Properties of Gases 10.2 Effusion and the Kinetic Molecular Theory of Gases 10.3 Atmospheric Pressure 10.4
More informationCopyright 2014 Edmentum - All rights reserved.
Copyright 2014 Edmentum - All rights reserved. AP Physics Blizzard Bag 2014-2015 Classical Mechanics 1. A block of mass 4.0 kg is attached to the end of a spring. The spring stiffness constant is 25 N/m.
More informationINSTRUCTION MANUAL LOW PRESSURE CALIBRATION PUMP MODEL PGL
INSTRUCTION MANUAL LOW PRESSURE CALIBRATION PUMP MODEL PGL Dear user, We have made every effort to ensure the accuracy of the contents of this manual. Should any errors be detected, we would greatly appreciate
More information*MAT GAS MIXTURE, a new gas mixture model for airbag applications
4 th European LS-DYNA Users Conference Occupant III / Airbag *MAT GAS MIXTURE, a new gas mixture model for airbag applications Author: Lars Olovsson LSTC Correspondence: tel/fax: +46-852 030 881 e-mail:
More informationTechnical Support Note
Title: Air Dilution Correction using O2 and CO2 TSN Number: 17 File:S:\Bridge_Analyzers\Customer_Service_Documentation\Technical_Support_Notes\ 17 Air Dilution correction using O2 and CO2.docx Created
More informationINTERACTION BETWEEN WIND-DRIVEN AND BUOYANCY-DRIVEN NATURAL VENTILATION Bo Wang, Foster and Partners, London, UK
INTERACTION BETWEEN WIND-DRIVEN AND BUOYANCY-DRIVEN NATURAL VENTILATION Bo Wang, Foster and Partners, London, UK ABSTRACT Ventilation stacks are becoming increasingly common in the design of naturally
More informationSizing Pulsation Dampeners Is Critical to Effectiveness
Sizing Pulsation Dampeners Is Critical to Effectiveness Pressure variation is an important consideration when determining the appropriate size pulsation dampener needed for an application. by David McComb,
More informationChemistry Chapter 11 Test Review
Chemistry Chapter 11 Test Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Pressure is the force per unit a. volume. c. length. b. surface area.
More informationEMISSION CHAMBERS. Bulk and Surface Emission Detection for the RAD7 User Manual
EMISSION CHAMBERS Bulk and Surface Emission Detection for the RAD7 User Manual TABLE OF CONTENTS INTRODUCTION 3 1 SYSTEM CONFIGURATION 4 1.1 Closed Loop Configuration 4 Fig. 1 Emission Chamber Closed Loop
More informationNIST Traceability Document
Page 1 of 9 Gas Flowmeter Calibration Using the Restek Designed Calibration System July 10, 2010 Document # 02-16-11 Procedure# 02-16-06 1.0 General Description The flow meter is a volumetric flow meter.
More informationA New Way to Handle Changing Fluid Viscosity and the Full-to-empty Effect
A New Way to Handle Changing Fluid Viscosity and the Full-to-empty Effect Nordson EFD, 40 Catamore Blvd., East Providence RI 02914 www.nordsonefd.com A New Way to Handle Changing Fluid Viscosity And the
More informationTutorial. BOSfluids. Relief valve
Tutorial Relief valve The Relief valve tutorial describes the theory and modeling process of a pressure relief valve or safety valve. It covers the algorithm BOSfluids uses to model the valve and a worked
More informationChapter 5. Pressure. Atmospheric Pressure. Gases. Force Pressure = Area
Chapter 5 Gases Water for many homes is supplied by a well The pump removes air from the pipe, decreasing the air pressure in the pipe The pressure then pushes the water up the pipe Pressure Atmospheric
More information11 Properties of Gases
South asadena Honors Chemistry Name 11 roperties of Gases eriod Date S A I O N 1 E M E R A U R E Standard emperature is: 0 C or 273 K Convert: 26.0 C 299 K 400 K _127 C 100 K 173 C 135 C _408_ K -127 C
More information1 Fluids and Pressure
CHAPTER 3 1 Fluids and Pressure SECTION Forces in Fluids BEFORE YOU READ After you read this section, you should be able to answer these questions: What are fluids? What is atmospheric pressure? What is
More information8. Now plot on the following grid the values of T (K) and V from the table above, and connect the points.
Charles s Law According to Charles s law, the volume of a fixed mass of gas varies directly with its Kelvin temperature if its pressure is constant. The following table contains Celsius temperature and
More informationVacuum Bagging Wings Instruction Manual Purdue University
Vacuum Bagging Wings Instruction Manual Purdue University Note: Do not leave the vacuum pump running unattended! Revision: Original Release 10/31/15 Vacuum bagged wings are quick to build, light weight,
More informationImpact of imperfect sealing on the flow measurement of natural gas by orifice plates
Impact of imperfect sealing on the flow measurement of natural gas by orifice plates Rubens Silva Telles 1, Kazuto Kawakita 2 1 IPT Instituto de Pesquisas Tecnológicas, São Paulo, Brazil, rtelles@ipt.br
More informationChapter 5. Nov 6 1:02 PM
Chapter 5 Nov 6 1:02 PM Expand to fill their containers Fluid motion (they flow) Have low densities (1/1000 the density of equivalent liquids or solids) Compressible Can Effuse and Diffuse Effuse: The
More informationEnd of Chapter Exercises
End of Chapter Exercises Exercises 1 12 are conceptual questions that are designed to see if you have understood the main concepts of the chapter. 1. While on an airplane, you take a drink from your water
More informationInternational Journal of Research in Advent Technology Available Online at:
Volume, Issue 5, December 23 AN APPROACH TO DEVELOPMENT OF AIR LEAKAGE TEST RIG FOR AIR HANDLING UNITS HOUSING. Deepak Singh Asst. Professor, Department of Mechanical Engineering Kautilya Institute of
More informationCORESTA RECOMMENDED METHOD N 6
CORESTA RECOMMENDED METHOD N 6 DETERMINATION OF VENTILATION DEFINITIONS AND MEASUREMENT PRINCIPLES (2015 Revision September 2016) 1. SCOPE This CORESTA Recommended Method specifies a method for the determination
More informationMultiple Pressure Booster Systems With Variable Speed Controller Type BL
Multiple Pressure Booster Systems With Variable Speed Controller Type BL General Characteristics - Single or multistage pumps - Horizontal or vertical mounting - Total head 30m ~ 250m - Material construction:
More informationThermal flow sensor TA Di with integrated transducer for measuring mass flow, standard flow rate and air / gas consumption
Thermal flow sensor TA Di for measuring mass flow, standard flow rate and air / gas consumption Sensor TA Di 16 41.8 ZG1b and TADi 16 41.8 ZG1b/M-Bus U10a/U10M Sensor TA Di 8 ZG3b and TA Di 8 ZG3b/M-Bus
More informationCHEMISTRY - CLUTCH CH.5 - GASES.
!! www.clutchprep.com CONCEPT: UNITS OF PRESSURE Pressure is defined as the force exerted per unit of surface area. Pressure = Force Area The SI unit for Pressure is the, which has the units of. The SI
More informationEF 151 Final Exam - Spring, 2017 Page 3 Copy 223
EF 151 Final Exam - Spring, 2017 Page 3 Copy 223 Name: Section: 1. Enter your EXAM ID from your seating label. If you don t know your exam ID, enter 000. 0 1 2 3 4 5 6 7 8 9 Digit #1 Digit #2 Digit #3
More informationLOW PRESSURE EFFUSION OF GASES adapted by Luke Hanley and Mike Trenary
ADH 1/7/014 LOW PRESSURE EFFUSION OF GASES adapted by Luke Hanley and Mike Trenary This experiment will introduce you to the kinetic properties of low-pressure gases. You will make observations on the
More informationImpulsive Pressurization of Neuronal Cells. M. Nienaber, J.S. Lee, R. Feng and J.Y. Lim
Impulsive Pressurization of Neuronal Cells M. Nienaber, J.S. Lee, R. Feng and J.Y. Lim Department of Engineering Mechanics University Nebraska-Lincoln Lincoln, NE 68588-0526 Work Supported by ARO 47th
More informationChapter 13: The Behavior of Gases
Chapter 13: The Behavior of Gases I. First Concepts a. The 3 states of matter most important to us: solids, liquids, and gases. b. Real Gases and Ideal Gases i. Real gases exist, ideal gases do not ii.
More informationat NIST: ultra-low outgassing rates
Traceable outgassing measurements at NIST: ultra-low outgassing rates and new materials James Fedchak Thermodynamic Metrology Group Sensor Science Division Physical Measurement Laboratory Vacuum Project:
More informationChapter 5: Gases 5.1 Pressure Why study gases? An understanding of real world phenomena. An understanding of how science works.
Chapter 5: Gases 5.1 Pressure Why study gases? An understanding of real world phenomena. An understanding of how science works. A Gas Uniformly fills any container. Easily compressed. Mixes completely
More informationGas Pressure. Pressure is the force exerted per unit area by gas molecules as they strike the surfaces around them.
Chapter 5 Gases Gas Gases are composed of particles that are moving around very fast in their container(s). These particles moves in straight lines until they collides with either the container wall or
More informationFinding Leak Testing Success Through Calibration and Validation. Paul Chamberlain President, CEO
Finding Leak Testing Success Through Calibration and Validation Paul Chamberlain President, CEO 2 Overview Confidence in Your Leak Test Results Sources of Uncertainty Pressure decay leak testing Helium
More informationExperimental determination of deflagration explosion characteristics of methane air mixture and their verification by advanced numerical simulation
Structures Under Shock and Impact XII 169 Experimental determination of deflagration explosion characteristics of methane air mixture and their verification by advanced numerical simulation M. Mynarz,
More informationDURRIDGE STAINLESS STEEL SOIL GAS PROBE
DURRIDGE STAINLESS STEEL SOIL GAS PROBE CONTENTS 1. Introduction... 3 2. Placement... 3 3. Connection... 4 4 Measurement... 4 4.1 GRAB Protocol... 5 4.2 Continuous Monitoring... 6 4.3 Thoron Protocol...
More informationPMI Advanced Automated. Pulse Decay Permeameter APDP-10K-HP-101. Not just products... Solutions!
PMI Advanced Automated Pulse Decay Permeameter APDP-10K-HP-101 Not just products... Solutions! DESCRIPTION The PMI s Advanced automated pulse decay Permeameter is used to measure gas permeability of samples
More informationCHEM 355 EXPERIMENT 7. Viscosity of gases: Estimation of molecular diameter
CHEM 355 EXPERIMENT 7 Viscosity of gases: Estimation of molecular diameter Expressed most simply, the viscosity of a fluid (liquid or gas) relates to its resistance to flow. The viscosity of a gas is determined
More informationMCQ Gas Blender 100 Series 3 Channels Gas Mixer
Channels Gas Mixer Revision 1.8 October 2016 High Performance Digital Gas flow Gas Dilutor Blender & Gas for Mixing flow Mixing Gases System and Calibration Routines Technical Data Sheet Lab in a box From
More informationDesign Review Agenda
Design Review Agenda 1) Introduction, Motivation, and Previous Work a. Previous Work and Accomplishments i. Platform Launches ii. Successful Test Firings 2) More In-Depth Design Overview of the Existing
More informationLecture Handout 5: Gases (Online Text Chapter 6)
Lecture Handout 5: Gases (Online Text Chapter 6) I. The Structure of a Gas A. Gases are composed of particles that are flying around very fast in their container(s). 1. The particles travel in straight
More informationPlease do not write on this test. Please use the answer sheet. 1) Please choose all conditions that would allow a gas sample to behave ideally.
AP Chemistry Test (Chapter 5) Please do not write on this test. Please use the answer sheet. Multiple Choice (50%) 1) Please choose all conditions that would allow a gas sample to behave ideally. I) Nonpolar
More informationThis educational seminar discusses creating, measuring, and troubleshooting Rough Vacuum.
This educational seminar discusses creating, measuring, and troubleshooting Rough Vacuum. Specifically, today s talk will cover: Brief review of Vacuum Fundamentals Applications Using Rough Vacuum Rough
More informationResults of mathematical modelling the kinetics of gaseous exchange through small channels in micro dischargers
Journal of Physics: Conference Series PAPER OPEN ACCESS Results of mathematical modelling the kinetics of gaseous exchange through small channels in micro dischargers Related content - The versatile use
More informationEarlier Lecture. In the earlier lecture, we have seen Kapitza & Heylandt systems which are the modifications of the Claude System.
17 1 Earlier Lecture In the earlier lecture, we have seen Kapitza & Heylandt systems which are the modifications of the Claude System. Collins system is an extension of the Claude system to reach lower
More informationB. As the gas particles move and strike a surface, they push on that surface 1. If we could measure the total amount of force exerted by gas
Chapter 5: Gases I. The Structure of a Gas A. Gases are composed of particles that are flying around very fast in their container(s). 1. The particles travel in straight lines until they encounter either
More informationCOMPAFLOW. Compressed Air. Volumetric flow. Gas. Mass flow. Steam. Net volumetric flow. Liquid
Volumetric flow Compressed Air Mass flow Gas Net volumetric flow Steam Liquid Universal compact orifice flow meter combines a compact orifice flow sensor and sotiphicated converter One-piece flow sensor,
More informationAssumptions 1 At specified conditions, air behaves as an ideal gas. 2 The volume of the tire remains constant.
PTT 04/ Applied Fluid Mechanics Sem, Session015/016 ASSIGNMENT 1 CHAPTER AND CHAPTER 1. The air in an automobile tire with a volume of 0.0740 m is at 0 C and 140 kpa. Determine the amount of air that must
More informationCustomer Information Bulletin
3D Production Printers Advisory Upgrade / Repair / Retrofit Safety Alert Purpose: Tips and Info Accura Bluestone Material Accura Bluestone Material Tips and Info - Accura Bluestone Material 1. Each material
More informationLab 1c Isentropic Blow-down Process and Discharge Coefficient
058:080 Experimental Engineering Lab 1c Isentropic Blow-down Process and Discharge Coefficient OBJECTIVES - To study the transient discharge of a rigid pressurized tank; To determine the discharge coefficients
More informationDynamic Surface Tensiometer Bubble Pressure Method BP-D5, BP-D5L. Kyowa Interface Science Co., Ltd.
Dynamic Surface Tensiometer Bubble Pressure Method BP-D5, BP-D5L Kyowa Interface Science Co., Ltd. Basics of Dynamic surface tension & Bubble pressure method What is Dynamic Surface Tension?! If a state
More informationPlease note that there was an error in the initial proposal: samples should be nominally 1 inch in diameter (see below).
Test schedule for Inter-lab testing Perm/Strength/Vel... October 9, 2008 from David Lockner Dear colleagues, Here is the revised protocol for Inter-lab testing of Strength/Permeability/Wave
More informationOffshore platforms survivability to underwater explosions: part I
Computational Ballistics III 123 Offshore platforms survivability to underwater explosions: part I A. A. Motta 1, E. A. P. Silva 2, N. F. F. Ebecken 2 & T. A. Netto 2 1 Brazilian Navy Research Institute,
More informationCoupling and Analysis of 981 Deep Water Semi-submersible. Drilling Platform and the Mooring System
4th International Conference on Renewable Energy and Environmental Technology (ICREET 2016) Coupling and Analysis of 981 Deep Water Semi-submersible Drilling Platform and the Mooring System XuDong Wang1,
More informationVENTILATION DURING TUNNEL CONSTRUCTION INDUSTRY CONSIDERATIONS
VENTILATION DURING TUNNEL CONSTRUCTION INDUSTRY CONSIDERATIONS Air Quality Working Group Information Package - Part 7 of 12 December 2018 Doc No. AQWG_5_0.08 Page 1 of 12 Ventilation during Tunnel Construction
More informationChapter 9 Fluids and Buoyant Force
Chapter 9 Fluids and Buoyant Force In Physics, liquids and gases are collectively called fluids. 3/0/018 8:56 AM 1 Fluids and Buoyant Force Formula for Mass Density density mass volume m V water 1000 kg
More informationAdvantages of Carrier Gas Leak Detection using Novel Helium or Hydrogen Leak Detectors with Specific Sensor Types
19 th World Conference on Non-Destructive Testing 2016 Advantages of Carrier Gas Leak Detection using Novel Helium or Hydrogen Leak Detectors with Specific Sensor Types Klaus HERRMANN 1, Daniel WETZIG
More informationMACH ONE MASS FLOW CONTROLLER. MACH ONE SERIES flow control. MASS FLOW CONTROLLERS at the speed of sound.
MACH ONE MASS FLOW CONTROLLER MACH ONE SERIES flow control MASS FLOW CONTROLLERS at the speed of sound. MACH ONE SERIES MASS FLOW CONTROLLER FLOW CONTROL AT THE SPEED OF SOUND The Mach One revolutionary
More informationPressure Measurement
Pressure Measurement Manometers Sensors, Transducers Ashish J. Modi Lecturer, Dept. of Mech.Engg., Shri S.V.M. inst. Of Technology, Bharuch Pressure Pressure is a force per unit area exerted by a fluid
More informationA Reliable and Tracer Gas Independent Leak Detector for Food Packages
19 th World Conference on Non-Destructive Testing 2016 A Reliable and Tracer Gas Independent Leak Detector for Food Packages Silvio DECKER 1 1 INFICON GmbH, Köln, Germany Contact e-mail: Silvio.Decker@inficon.com-
More informationLAB 13: FLUIDS OBJECTIVES
217 Name Date Partners LAB 13: FLUIDS Fluids are an important part of our body OBJECTIVES OVERVIEW Fluid Properties To learn how some fundamental physical principles apply to fluids. To understand the
More informationPlunger Fall Velocity Model
Gas Well Deliquification Workshop Sheraton Hotel, Denver, Colorado February 19 22, 2012 Plunger Fall Velocity Model Lynn Rowlan & James N. McCoy James F Lea Rick Nadkrynechny Carolyn Cepuch New Plunger
More informationLab 3 Introduction to Quantitative Analysis: Pumps and Measurements of Flow
Georgia Institute of Technology School of Earth and Atmospheric Sciences EAS 4641, Spring 2008 Lab 3 Introduction to Quantitative Analysis: Pumps and Measurements of Flow Purpose of Lab 3: 1) To gain a
More informationFluids. James H Dann, Ph.D. Say Thanks to the Authors Click (No sign in required)
Fluids James H Dann, Ph.D. Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit
More informationLAB 13: FLUIDS OBJECTIVES
205 Name Date Partners LAB 13: FLUIDS Fluids are an important part of our body OBJECTIVES OVERVIEW Fluid Properties To learn how some fundamental physical principles apply to fluids. To understand the
More informationTwo interconnected rubber balloons as a demonstration showing the effect of surface tension
Two interconnected rubber balloons as a demonstration showing the effect of surface tension Abstract Science One 28-9 CHEN, Chieh-Shan The two interconnected rubber balloons system is a demonstration widely
More informationSPD Pressure Sensor Families
DATASHEET SPD Pressure Sensor Families 1/7 Introduction to the principals of Smart Pressure Devices 1 Basic principles Pressure sensors are based on the principle of bending a membrane caused by the pressure
More informationGases. Chapter 5: Gas Laws Demonstration. September 10, Chapter 5 Gasses.notebook. Dec 18 10:23 AM. Jan 1 4:11 PM. Crushing 55 gallon drum
Chapter 5: Gases Dec 18 10:23 AM Gas Laws Demonstration Crushing 55 gallon drum Egg in a bottle Student in a bag Boiling Water Charles gas Law Water in a flask Ballon in a bottle Jan 1 4:11 PM 1 5.1 Pressure
More information2600T Series Pressure Transmitter Models 264DC Differential and 264HC Gage Level Transmitters. Kent-Taylor
INDUSTRIAL INSTRUMENTS AND CONTROLS SPECIALIST Kent-Taylor 2600T Series Pressure Transmitter Models 264DC Differential and 264HC Gage Level Transmitters Features Include Base accuracy : ±0.075% Span limits
More informationPVP Copyright 2009 by ASME
Proceedings of PVP 009 009 ASME Pressure Vessel and Piping Division Conference July 6-30, 009, Prague, Czech Republic PVP009-7746 UPDATE OF THE TABULATED «M AND Y» VALUES IN THE NEW REVISIONS OF FRENCH
More informationMeasurement of Air Leakage through Rotary Valves
University of Wollongong Research Online Faculty of Engineering - Papers (Archive) Faculty of Engineering and Information Sciences Measurement of Air Leakage through Rotary Valves David B. Hastie University
More informationBASIC QUANTITIES OF GASES
BASIC QUANTITIES OF GASES PRESSURE (P): Definition: 1 atm = 101325 Pa = 1,01325 bar (1 bar = 10 5 Pa) 1 atm = cmhg = mmhg (Torr) Manometer: Barometer: VOLUME (V): - - - Unit: 1 NUMBER OF MOLES (n): Avogadro
More informationSection 5.1 Pressure. Why study gases? An understanding of real world phenomena. An understanding of how science works.
Chapter 5 Gases Section 5.1 Pressure Why study gases? An understanding of real world phenomena. An understanding of how science works. Copyright Cengage Learning. All rights reserved 2 Section 5.1 Pressure
More informationMemorandum Background: Results and Discussion:
Memorandum To: Dr. Abercromby From: Jason Rapp and Matthew Stumbo Date: January 17, 2012 Subject: Vacuum Chamber Basics Technical Memo Background: We explored several aspects of vacuum chambers, in preparation
More informationSingle Pressure/ vacuum decay leak rate, loss, rate of loss, or occlusion tests with standard Cv valves.
Application Bulletin: #167 Date: November 2009 BLACKBELT PRINCIPALS OF OPERATION INSTRUMENT CONFIGURATIONS Depending on the types of tests required and resolution and repeatability desired, the Sentinel
More informationPRESSURE DISTRIBUTION OF SMALL WIND TURBINE BLADE WITH WINGLETS ON ROTATING CONDITION USING WIND TUNNEL
International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) ISSN 2249-6890 Vol.2, Issue 2 June 2012 1-10 TJPRC Pvt. Ltd., PRESSURE DISTRIBUTION OF SMALL WIND TURBINE
More informationLESER Deutschland Standard Functional Tightness Test (Cryo) Content
Page 1/10 Content 1 Purpose... 1 2 Scope... 1 3 Range of Application... 1 4 Normative Background... 2 5 Terms and Definitions... 2 6 Test Equipment... 3 7 Test Procedure... 5 8 Acceptance Criteria... 8
More informationComments on Homework. Quiz. Class 3 - Pressure. Atmospheric Pressure. 2. Gauge vs. Absolute Pressure. 1. Definitions. Temperature conversion
Comments on Homework Quiz Temperature conversion T ( R) = T (K) 1.8 T ( C) = T(K) - 273.15 T ( F) = T( R) - 460 However, difference in temperature is: T ( C) = T (K) T ( F) = T ( R) T ( R) = 1.8 T ( C)
More informationExercise 5-2. Bubblers EXERCISE OBJECTIVE DISCUSSION OUTLINE. Bubblers DISCUSSION. Learn to measure the level in a vessel using a bubbler.
Exercise 5-2 Bubblers EXERCISE OBJECTIVE Learn to measure the level in a vessel using a bubbler. DISCUSSION OUTLINE The Discussion of this exercise covers the following points: Bubblers How to measure
More informationDiscussion and guidance on the definition and qualification of porous loads
SUMMARY Porous Loads requiring Sterilisation are often a Critical Control Point for the manufacture of Sterile products. Particularly Aseptically filled products. Regulatory guidance in this area is not
More information