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1 Axial Fan Wind Turning Vane Scale Model Test Results Prepared for ACCUG Conference September 22-25, 2014 San Diego, California By MarJn J. Cuerdon P.E. 9/7/2014 Advanced AnalyJcal SoluJons, LLC 1
2 Classic Axial Fan Flow DistorJon and Asymmetry Distorted flows arising from upstream air- turning circumstances are, however, unavoidable in many instances. For example, a fan taking air from the free atmosphere will be subjected to varying wind condijons, which in the most severe case will be at right angles to the fan axis. Source: Wallis, R. Allen, Axial Flow Fans and Ducts, John Wiley & Sons, 1983, ACC Axial Fans are inherently operajng with crosswinds of the most severe case. 10/16/2013 Advanced AnalyJcal SoluJons, LLC 2
![Coal- Based Thermoelectric Power Plants [DEFC2606NT06549], Final Report 3/31/2011, DOE Funding](/docs-images/76/73484466/images/3-1.jpg "Opportunity, DE- PS26-08NT00233-01, Principal InvesJgator: Ken Mortensen.")
3 ACC Axial Fan Performance CFD Predicted Wind Related DegradaJon, DistorJon & Asymmetry Calm Winds 20 MPH Winds Source: Improved Performance of an Air Cooled Condenser (ACC) Using SPX Wind Guide Technology at Coal- Based Thermoelectric Power Plants [DEFC2606NT06549], Final Report 3/31/2011, DOE Funding Opportunity, DE- PS26-08NT , Principal InvesJgator: Ken Mortensen. 10/16/2013 Advanced AnalyJcal SoluJons, LLC 3
4 Source: Maulbetsch, John, Michael DiFilippo Effect of Wind on the Performance of Air- Cooled Condensers. California Energy Commission. Publication Number: CEC /7/2014 Advanced AnalyJcal SoluJons, LLC 4
5 Source: Improving Performance of ACC using SPX Wind Guide Technology, Award by National Energy Technology Laboratory, Department of Energy, October 27, /7/2014 Advanced AnalyJcal SoluJons, LLC 5
6 10/16/2013 Advanced AnalyJcal SoluJons, LLC 6
7 10/16/2013 Advanced AnalyJcal SoluJons, LLC 7
8 ACC Axial Fan Performance Wind Related DegradaJon, DistorJon & Asymmetry Not Limited To Large Diameter Fans FORWARD FLIGHT 6 m/s Source: Ali Akturk, Akamol Shavalikul and Cengiz Camci, PIV Measurements and ComputaTonal Study of a 5- Inch Ducted Fan for V/STOL UAV ApplicaTons, AIAA , 47th AIAA Aerospace Sciences MeeTng and Exhibit, 5-8 January 2009, Orlando, Florida 10/16/2013 Advanced AnalyJcal SoluJons, LLC 8
9 Conclusions: 1. Non- Axisymmetric Axial Fan Output Airflow is the result of Non- Axisymmetric Inlet Flow. 2. Non- Axisymmetric Axial Fan Inlet Flow in ACC s is caused by crosswinds. 3. Axial Fan Inlet/Outlet Asymmetry is independent of the Fan Diameter. 4. A small diameter axial fan should be sufficient to test the Wind Turning Vane Concept, i.e., will the wind turning vane operajng in a cross wind condijon result in axisymmetric axial fan outlet airflow? 9/7/2014 Advanced AnalyJcal SoluJons, LLC 9
10 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane 9/7/2014 Advanced AnalyJcal SoluJons, LLC 10
11 9/7/2014 Advanced AnalyJcal SoluJons, LLC 11
12 Scale Model Turning Vane created by 3D PrinJng a SolidWorks CAD Model. 9/7/2014 Advanced AnalyJcal SoluJons, LLC 12
13 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane Step 2: Build a Scale Model Test Apparatus 9/7/2014 Advanced AnalyJcal SoluJons, LLC 13
14 9/7/2014 Advanced AnalyJcal SoluJons, LLC 14
15 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane Step 2: Build a Scale Model Test Apparatus Step 3: Test Fan Without Crosswind & No Turning Vane 9/7/2014 Advanced AnalyJcal SoluJons, LLC 15
16 Chart 1 80 mm Computer Fan Output Air Velocity Versus Distance From Fan Centerline Crosswind Fan Turned Off Turning Vane Not Anached 7 Outlet Air Velocity (Ft/Sec) Symmetric Outlet DistribuJon Typical of Axial Fan Inlet Without Crosswind CondiJon Distance From Fan Centerline (Inches) 9/7/2014 Advanced AnalyJcal SoluJons, LLC 16
17 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane Step 2: Build a Scale Model Test Apparatus Step 3: Test Fan Without Crosswind & No Turning Vane Step 4: Test Fan With Crosswind & No Turning Vane 9/7/2014 Advanced AnalyJcal SoluJons, LLC 17
18 Chart 2 80 mm Computer Fan Output Air Velocity Versus Distance From Fan Centerline Asymmetric Outlet DistribuJon Typical of Axial Fan Inlet Crosswind CondiJon Crosswind Fan Turned On Turning Vane Not Anached Outlet Air Velocity (Ft/Sec) Distance From Fan Centerline (Inches) 9/7/2014 Advanced AnalyJcal SoluJons, LLC 18
19 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane Step 2: Build a Scale Model Test Apparatus Step 3: Test Fan Without Crosswind & No Turning Vane Step 4: Test Fan With Crosswind & No Turning Vane Step 5: Test Fan Without Crosswind & With Turning Vane 9/7/2014 Advanced AnalyJcal SoluJons, LLC 19
20 Chart 3 80 mm Computer Fan Output Air Velocity Versus Distance From Fan Centerline Symmetric Outlet DistribuJon Typical of Axial Fan Inlet w/o Crosswind CondiJon Crosswind Fan Turned Off Turning Vane Anached 3.5 Outlet Air Velocity (Ft/Sec) Distance From Fan Centerline (Inches) 9/7/2014 Advanced AnalyJcal SoluJons, LLC 20
21 Wind Turning Vane Scale Model Test Step 1: Create a Scale Model Wind Turning Vane Step 2: Build a Scale Model Test Apparatus Step 3: Test Fan Without Crosswind & No Turning Vane Step 4: Test Fan With Crosswind & No Turning Vane Step 5: Test Fan Without Crosswind & With Turning Vane Step 6: Test Fan With Crosswind & With Turning Vane 9/7/2014 Advanced AnalyJcal SoluJons, LLC 21
22 6 5 Chart 4 80 mm Computer Fan Output Air Velocity Versus Distance From Fan Centerline Asymmetric Outlet DistribuJon Typical of Axial Fan Inlet with Crosswind CondiJon Eliminated by InstallaJon of Wind Turning Vane Crosswind Fan Turned On Turning Vane Anached Outlet Air Velocity (Ft/Sec) Distance From Fan Centerline (Inches) 9/7/2014 Advanced AnalyJcal SoluJons, LLC 22
23 European Fan OEM EBM- Papst Announced in October 2013 a new product FlowGrid a fan inlet noise reducer. It uses the idenjcal principle as the Wind Turning Vane concept. 9/7/2014 Advanced AnalyJcal SoluJons, LLC 23
24 Wind Turning Vane Scale Model Test Conclusion: The Axial Fan Wind Turning Vane Scale Model Converted a Crosswind Inlet CondiJon Into an Axi- Symmetric Outlet CondiJon. Therefore, A Full Scale Wind Turning Vane, mounted on an Air Cooled Condenser, Should Significantly Reduce Crosswind Fan VibraJons. 9/7/2014 Advanced AnalyJcal SoluJons, LLC 24
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