Co-Flow Jet Airfoil for Ultra-High Efficiency and Quiet Aircraft
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1 Co-Flow Jet Airfoil for Ultra-High Efficiency and Quiet Aircraft Patent: US B2 Dr. Gecheng Zha, President Professor Coflow Jet, LLC PO Box Coral Gables, FL Research Sponsors: DARPA, NASA, AFRL, ARO, AFOSR, CIRA, Emil Buehler Perpetual Trust.
2 Airfoil: The fundamental element of aircraft Sir George Cayley Bt. ( ) Father of Aeronautics mimicked from dolphin Little new transonic airfoil improvement since 1960 s supercritical airfoil. Little new subsonic airfoil development since 1940 s NACA and European Airfoils.
3 Bird Wings: Super-Efficiency at Cruise Alaska Shorebirds, nonstop flight from Alaska to New Zealand in 9 days, 7145miles, V=14.8m/s=33miles/h. Bird s flapping wings generate lift and thrust due to the supersuction at leading edge at downstroke. F Super-suction at Leading Edge is the Key
4 Bird Wings: Super-High Lift Coefficient at Landing Owl s Preying Maneuver, ultra-high AoA and Lift, no stall Quiet due to no wake turbulence noise Super-suction at leading edge is the Key
5 Learn from Nature How can we generate supersuction with fixed wings? How can we use one set of wings for both high efficiency cruise and ultra-high lift at takeoff/landing?
6 Co-Flow Jet (CFJ) Airfoil: Ultra-High Efficiency High Lift, Low Drag, High Stall Margin, Low Noise, Low Energy Expenditure Zero-Net Mass Flux Flow Control Leading Edge Supersuction with Fixed Wing
7 Wind Tunnel Experiment of Co-Flow Jet Airfoil University of Miami Blowing Suction M x24 x48 Injection Compressor Vacuum pump
8 Co-Flow Jet Airfoil Flow Control Experiment Airfoil Flow Separation, No Control, AoA= 25 o, Co-Flow Jet Airfoil, No Flow Separation, AoA= 25 o, CFJ Airfoil has No Flow Separation, Reduce wake, generate thrust Very low energy expenditure
9 Ultra-High Lift, Low Drag, Low Energy Expenditure Lift vs Angle of Attack Drag polar, Thrust generated Cµ*=0.30 Lift Coefficient Unconventional drag polar, high lift with high thrust, low energy expenditure
10 CL=10.6, Cmu=0.35 M=0.067, Flow Attached at AoA=70deg. The circulation is so high that the stagnation point is detached from the airfoil. Owl s wing effect achieved by CFJ Airfoil at high AoA, high lift, no stall, no wake, no flap system. V CL=10.6
11 CFJ Airfoil improves transonic cruise performance CFJ Cmu= Supersuction Airfoil surface Mach number CFJ Baseline Baseline M=0.73, L/D improved by 14.7%, CL improved by 18%, Productivity efficiency improved by 36%
12 Electric General Aviation Airplane Using CFJ, 4 Passenger, Range of 360miles, 3X of SoA
13 Engineless aircraft propelled by CFJ Wing
14 Mars Aerial-Ground Global Explorer Using CFJ Vertical takeoff/landing, Circle Mars 160 times
15 Impact: CFJ airfoil revolutionizes aviation from the most fundamental element: the airfoil. Ultra-High Cruise Productivity Efficiency to Substantially Increase Range and Payload. Extremely Short Takeoff/Landing due to Super-Lift Coefficient Applicable from subsonic to transonic Flapless system to reduce noise, weight and cost Smaller size due to high wing loading(high CL) CFJ wing with thrust forms a new way of distributed electric propulsion, Ideal for hybrid-electric propulsion.
16 Product development: GA electric CFJ aircraft, 4 passengers, R=360miles, V=220miles/h, Double the range of the same size electric GA.
17 Product development: CFJ Transonic business Jet with hybrid (fuel + electric) propulsion, at least 30% more efficient than conventional aero design.
18 Ultra-High Efficiency Wind Turbine Using CFJ Conventional Turbine CFJ Turbine, 30% more power
19 Leadership Team Gecheng Zha, PHD, President, Professor on Aerodynamics, CFD, Aircraft Design, Inventor of CFJ Airfoil Technology Joseph Johnson, PHD, VP of Marketing, Associate Professor on New Product Development, Strategic Brand Management, Marketing Strategy Peter Trogos, VP of Business Development, Former Academic Ambassador of Dassault Systèmes, Industry Advisor at ASME, BS of Mathematics
20 Engineering Team Leaders: Dr. Yan Ren, Mr. Yunchao Yang (Ph.D. Candidate) Annual BBQ in Dr. Zha s house
21 Mission: Transform Aviation Industry with Ultra- High Efficiency Coflow Jet Wing from Subsonic to Transonic Speed. Objective: Commercialize CFJ Technology to Benefit Society. Collaboration and Investment welcomed. Together, We change the world. Coflowjet.com Contact:
Ultra-High Efficiency Co-Flow Jet Airfoil and the Transformative. Aircraft
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