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Da’ Fuser Team Turbojet Diffuser Study Data Presentation Robby Swoish Mike Vostrizansky Ryan Wiltshire November 29, 2005.

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Presentation on theme: "Da’ Fuser Team Turbojet Diffuser Study Data Presentation Robby Swoish Mike Vostrizansky Ryan Wiltshire November 29, 2005."— Presentation transcript:

1 Da’ Fuser Team Turbojet Diffuser Study Data Presentation Robby Swoish Mike Vostrizansky Ryan Wiltshire November 29, 2005

2 Tests To Date Mach Number Characterization Mach Number Characterization Baseline Baseline Pressure Tests (Mach.33 and.38)Pressure Tests (Mach.33 and.38) Separation Tests (Mach.33 and.38)Separation Tests (Mach.33 and.38) China Clay China Clay String Visualization String Visualization Surface Roughness Modifications Surface Roughness Modifications Pressure Tests (Mach.33 and.38)Pressure Tests (Mach.33 and.38) 120 grit sand paper 120 grit sand paper 80 grit sand paper 80 grit sand paper 60 grit sand paper 60 grit sand paper Chevron Vortex Generators Chevron Vortex Generators Pressure Tests (Mach.33 and.38)Pressure Tests (Mach.33 and.38)

3 Experimental Setup

4 Mach Number Characterization D = 44 mm Mach 0.33 D = 48 mm Mach 0.38

5 Baseline Tests Pressure Tests Pressure Tests

6 Baseline Tests Pressure Tests Pressure Tests TestWall Eff. At Mach 0.33 Eff. At Mach 0.38 5Top0.3790.375 5Bottom0.2250.170 6Top0.4180.374 6Bottom0.1450.126

7 Baseline Tests Separation Tests Separation Tests –China Clay Trial 1 Flow Separation Point Trial 2Trial 3

8 Baseline Tests Separation Tests Separation Tests –China Clay Found separation to occur ~ 1.5 cm downstream of inlet Found separation to occur ~ 1.5 cm downstream of inlet –String Visualization Results were consistent with China Clay tests Results were consistent with China Clay tests

9 Surface Roughness Modifications Pressure Tests Pressure Tests –120 grit sand paper –80 grit sand paper - 60 grit sand paper

10 Chevron Vortex Generators Pressure Tests Pressure Tests Chevrons

11 Testing Results/Preliminary Conclusions - Surface Roughness decreased Coefficient of Pressure For All Conditions - Chevrons (Vortex Generator) Increased Cp In All Conditions Note: Cp is An Indicator of Efficiency Cp = (Pout –Pin)/(P o in-Pin)

12 Diffuser Reshaping Refine diffuser divergence angle via modeling clay techniques Refine diffuser divergence angle via modeling clay techniques Pressure tests to be completed by Wednesday, 11/30/2005. Pressure tests to be completed by Wednesday, 11/30/2005.

13 Investigation Schedule Progress (weeks)

14

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