Post on 03-Dec-2023
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Final Manuscript 4505-PMS, Gordon & Imbabi 21
Wide Angle Diffuser
Corner Vanes
Screens
Settling Chamber
Flow DirectionTest Section
Axial Fan
Exit Diffuser
Contraction
Screens
Honeycomb
Fig. 1: Conventional wind tunnel design
Final Manuscript 4505-PMS, Gordon & Imbabi 24
Fig. 4: Diffuser/ contraction section, no screens: velocity vectors, Re=104
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Fig. 5: Diffuser/ contraction section, one screen: velocity vectors, Re=104
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Fig. 6: Diffuser with guiding vanes and screen: speed contour plot, Re=50
Final Manuscript 4505-PMS, Gordon & Imbabi 28
Fig 7: Speed contour plots of various guiding vane settings, Re=104
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Fig. 8: 3D velocity vector plot of final tunnel design, Re=200
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0 50 100 150 200 250Distance From Base of Test Section (mm)
0
2
4
6
8
10
12
Vel
ocity
(m
/s)
MaxMeanMin
Velocity Profile 0.25 m From Contraction (No Screens)
Fig. 9: Velocity profile, no screens
Final Manuscript 4505-PMS, Gordon & Imbabi 31
0 50 100 150 200 250Distance From Base of Test Section (mm)
0
2
4
6
8
10
12
Vel
ocity
(m
/s)
MaxMeanMin
Velocity Profile 0.25 m From Contraction ( 2 Screens)
Fig. 10: Velocity profile, 2 screens
Final Manuscript 4505-PMS, Gordon & Imbabi 32
0 50 100 150 200 250Distance From Base of Test Section (mm)
0
2
4
6
8
10
12
Vel
ocity
(m
/s)
MaxMeanMin
Velocity Profile 0.25 m From Contraction ( 2 Screens)
Fig. 11: Final tunnel velocity profile
Final Manuscript 4505-PMS, Gordon & Imbabi 33
Fig 12: Speed contour plots for final tunnel design, Re=104