Numerical simulation research on the arrangement of the aerodynamic braking plates in the train

作者：Tian Chun^*; Wu Mengling; Zhu Yangyong; Fei Weiwei

来源：China Railway Science, 2012, 33(3): 98-101.

DOI：10.3969/j.issn.1001-4632.2012.03.16

• Arrangement
• Braking effect
• Braking plate
• Fluid simulations
• High speed trains
• Influence zones
• Initial speed
• Lateral distance
• Negative correlation
• Numerical simulation research
• Per unit
• Railway carriages
• Train speed
• Vertical distance

Fluid simulation analysis software FLUENT was adopted to study the influence zone of the wake of the braking plate as well as the influence of its lengthwise distance on braking effect. Meanwhile, the influence law of its different lateral distance on braking resistance was analyzed. Results indicate that the lengthwise distance between two braking plates has a negative correlation with the effect of the wake of the front braking plate on the back one. As the lengthwise distance between two braking plates exceeds the length of two railway carriages, the effect completely diminishes. The increase of the lateral distance of two braking plates can increase the braking resistance per unit area provided that the areas of the plates are equal. The instantaneous deceleration caused by braking plate increases with the initial speed. The total braking resistance caused by braking plate is about 160 kN when the initial speed of emergency braking is 500 km&middoth-1, here the instantaneous deceleration is around 0.33 m&middots-1. In conclusion, the braking resistance generated by aerodynamic braking contributes a great deal to the braking of high-speed train when train speed is very high, which proves that aerodynamic braking has excellent braking performance for high-speed train.

• 出版日期2012
• 单位同济大学