Characteristics of a wind-actuated aerodynamic braking device for high-speed trains

15th Asian Congress of Fluid Mechanics

物理学;力学

Takami, H.^1 ; Maekawa, H.^2

Brake Control, Vehicle Control Technology Division, Railway Technical Research Institute, Tokyo, Japan^1

Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications, Tokyo, Japan^2

关键词: Aerodynamic braking;    Braking devices;    High speed train (HST);    Scale modeling;    Stopping distance;    Wind tunnel experiment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012061/pdf
DOI  :  10.1088/1742-6596/822/1/012061

学科分类：力学，机械学

来源: IOP

【 摘 要 】

To shorten the stopping distance of the high speed trains in case of emergency, we developed a small-sized aerodynamic braking unit without use of the friction between a rail and a wheel. The developed device could actuate a pair of two drag panels with a travelling wind. However, after the drag panel fully opened, vibrational movements of the drag panel characterized by its slight flutter were repeated. In this study, to stabilize the opened panel, matters pertaining to the angle of attack with respect to the drag panel and pertaining to the arrangement of the two panels were examined by a wind tunnel experiment using a scale model. As a result, to stabilize the opened panel and to keep the good performance of the braking device, it is found out that an angle of attack of 75 to 80 degrees is suitable provided that the interval of the two panels is narrow enough.