Measurement and Reduction of the Aerodynamic Bogie Noise Generated by High-Speed Trains in Terms of Wind Tunnel Testing

2021 ◽  
pp. 73-80
Author(s):  
Yoichi Sawamura ◽  
Toki Uda ◽  
Toshiki Kitagawa ◽  
Hiroshi Yokoyama ◽  
Akiyoshi Iida
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
Wind Tunnel Testing ◽  
High Speed Trains ◽  
Tunnel Testing

Videogrammetry of the Model’s Attitude in Wind Tunnel Testing

2012 ◽  
Vol 190-191 ◽  
pp. 1273-1277 ◽  
Author(s):  
Zheng Yu Zhang ◽  
Zhong Xiang Sun ◽  
Xu Hui Huang ◽  
Yan Sun
Keyword(s):  
Standard Deviation ◽  
Wind Tunnel ◽  
Drag Coefficient ◽  
Systematic Error ◽  
Measurement System ◽  
High Speed ◽  
Wind Tunnel Test ◽  
Wind Tunnel Testing ◽  
Supersonic Wind Tunnel ◽  
Tunnel Testing

The advanced precision of drag coefficient is 0.0001 for the high speed wind tunnel test of measuring forces, the model’s angle of attack precision is ≤0.01°following errors distribution. A videogrammetric method of model’s attitude is therefore proposed, its uncertainty is investigated, and a compensation method of its systematic error is also presented by this paper. The three engineering videogrammetric experiments of attack angle in 2 meter supersonic wind tunnel testing have demonstrated that measuring standard deviation of videogrammetric measurement system established by this paper is ≤0.0094°, in addition it neither destroys the model’s shape, nor changes the stiffness or strength, so it is useful and effective.

Evaluation of a Proposed Drift Reduction Technology High-Speed Wind Tunnel Testing Protocol

2009 ◽  
Vol 6 (4) ◽  
pp. 102122 ◽  
Author(s):  
W. Clint Hoffmann ◽  
Bradley K. Fritz ◽  
Y. Lan ◽  
R. Zollinger ◽  
Arlean Rhode ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
Wind Tunnel Testing ◽  
Testing Protocol ◽  
Tunnel Testing
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