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Structure clearance design in wind tunnel tests with implications for aerodynamic drag of high-speed trains

Author

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  • Zhixiang Huang
  • Hanjie Huang
  • Weiping Zeng
  • Li Chen
  • Renyu Zhu

Abstract

The influences of vestibule diaphragm gap, wheel-rail clearance, and strut-plate gap on the aerodynamic drag of a 1/8th-scale HST model were investigated in an 8 m × 6 m wind tunnel. The Reynolds number was set to 2.2 × 106 based on train height. It was found that the variation of the vestibule diaphragm gap changed the aerodynamic drag distribution pattern of each car; the drag coefficient of the head and middle cars might change as high as 45%; however, the change in the drag coefficient of the total train was very small. The effects of the strut-plate gap on the aerodynamic drag of each car and the total train were small. The effect of the wheel-rail clearance on the drag of the head car was not significant. It was suggested that the vestibule diaphragm gap, strut-plate gap and wheel-rail clearance of the 1:8 scale high-speed train model should not be greater than 11, 15, and 7 mm, respectively.

Suggested Citation

  • Zhixiang Huang & Hanjie Huang & Weiping Zeng & Li Chen & Renyu Zhu, 2023. "Structure clearance design in wind tunnel tests with implications for aerodynamic drag of high-speed trains," International Journal of Rail Transportation, Taylor & Francis Journals, vol. 11(6), pages 961-972, November.
    • Handle: RePEc:taf:tjrtxx:v:11:y:2023:i:6:p:961-972
    DOI: 10.1080/23248378.2022.2123862
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