强侧风环境下高速列车CRH1气动性能研究
首发时间:2011-07-07
摘要:基于三维、定常、不可压缩N-S方程及k-ε双方程湍流模型,采用数值模拟计算的方法分别对高速列车CRH1在不同侧风风速、不同风向角工况下的气动性能进行模拟。研究结果表明:对于不同横风风速,车辆的横向力、升力及倾覆力矩均随着横风风速的增大而增大,但其对应的气动力系数基本保持不变;对于不同风向角,车辆的横向力、升力及倾覆力矩均随着风向角的增大先增大,风向角为75 时,气动力增长率变缓,对应的气动力系数变化与之一致。
关键词: 列车空气动力学 CRH1 强侧风 气动性能 数值模拟
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Research on the aerodynamic performance of high speed train CRH1 under strong crosswind
Abstract:on the Basis of three-dimensional, steady, incompressible Navier-Stokes equation and k-epsilon double equations turbulent model to simulate the aerodynamic performance of high speed train CRH1 under different wind speed, yaw angle. The results show that: to different wind speeds, aerodynamic forces increase with wind speed increasing, but the corresponding coefficients are basically unchanged. To different yaw angles ,the aerodynamic forces increase with the yaw angles increasing, however, as the yaw angle reaches 75, the growth rate is very lower. and The corresponding aerodynamic coefficients change is consistent with the aerodynamic forces.
Keywords: train aerodynamics CRH1 strong crosswind aerodynamic performance numerical simulation
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