Three-dimensional flow studies on a slotted transonic wind tunnel wall

AIAA Journal ◽  
1983 ◽  
Vol 21 (7) ◽  
pp. 999-1005 ◽  
Author(s):  
J. M. Wu ◽  
F. G. Collins ◽  
M. K. Bhat
Keyword(s):  
Wind Tunnel ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Tunnel Wall ◽  
Dimensional Flow ◽  
Transonic Wind Tunnel

Simulation of Interference Characteristics of the Model Supporting Beams with Different Forms of Section in Wind Tunnel Test

2014 ◽  
Vol 1025-1026 ◽  
pp. 910-913
Author(s):  
Xing Jun Hu ◽  
Yue Xing Miao
Keyword(s):  
Wind Tunnel ◽  
Flow Field ◽  
Three Dimensional ◽  
Wind Tunnel Test ◽  
Aerodynamic Characteristics ◽  
Three Dimensional Flow ◽  
Ansys Fluent ◽  
Correction Error ◽  
Dimensional Flow ◽  
Pressure Distributions

In order to study the effects of the supporting beams with different forms of section on the aerodynamic characteristics of car models. Model supporting beams with three different forms of section were designed based on standard MIRA model. The commercial CFD software - Ansys Fluent was used to simulate the three-dimensional flow field around the standard MIRA model installed with three different kinds of supporting beams. With comparisons between the drag coefficients, pressure distributions and velocity distributions around the wheels with the different supporting beams, the reasons for the differences in aerodynamics are analyzed and advices were given for helping choosing the supporting beam with minimal disturbance to reduce the correction error.

Effect of Wind-Tunnel Walls on the Drag of a Sphere

1981 ◽  
Vol 103 (3) ◽  
pp. 461-465 ◽  
Author(s):  
H. B. Awbi ◽  
S. H. Tan
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Three Dimensional ◽  
Blockage Ratio ◽  
Method Of Images ◽  
Three Dimensional Flow ◽  
Tunnel Wall ◽  
Pressure Coefficients ◽  
Blockage Factor ◽  
Blockage Correction

The wind-tunnel wall interference effect on the drag and base pressure coefficients is investigated experimentally in the range of Reynolds-number independence. The drag results of Achenbach for large blockage ratios are also included, thus covering a range of blockage ratio between 6.3 to 83.9 percent. The measured drag is corrected using blockage correction formulas for three-dimensional flow obtained by the method of images and the analytical equation of Maskell. The results given by Maskell’s method are found to be under-corrected by up to 20 percent and the method of images is totally inadequate. Replacing the blockage factor, ε, in Maskell’s equation by an empirically determined value improved the corrections considerably.

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