高速磁浮列车会车压力波数值计算研究  

Numerical study of the pressure load caused by high-speed passing maglev trains

作　　者：毕海权[1] 雷波[2] 张卫华[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]西南交通大学机械工程学院,四川成都610031

出　　处：《空气动力学学报》2006年第2期213-217,237,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(50375127);国家杰出青年基金(50525518);国家自然科学创新研究群体科学基金项目(50521503)

摘　　要：根据可压缩粘性流体的N-S方程和k-ε双方程湍流模型,运用移动网格技术,采用有限容积法对磁浮列车以500 km/h速度运行时的会车压力波进行了数值计算研究,计算结果与现车试验结果相差10%以内,表明了本文计算模型和方法的正确性;文中还研究了交会过程中列车周围的流场分布,结果表明:当列车交会时,两车之间的流场相互叠加,而两车之外的流场分布在整个交会过程中变化不大。The pressure load caused by high-speed passing maglev trains is an important aerodynamic problem, which has great effect on safety and comfort. But by now, it is impossible to test it by moving model. The field measurements were costly and unable to get enough test results. So numerical calculation becomes an important method in studying the pressure load caused by high-speed passing maglev trains. In this paper, the calculation model for pressure load is established fimtly based on the N-S equation of compressible viscous fluid and κ-ε turbulence model. Then the pressure load caused by the 500 km/h passing maglev trains is investigated using the finite volume method. Because the passing movement is a complicated process, the moving mesh technology is introduced. And through adding and removing the mesh, the calculation area is kept relatively fixed, which greatly save the computer resources. By comparing with the full-scale test results, the difference between the numerical calculation results and that of the test is less than 10%, which indicates that the calculation model and numerical method used above is proper. In order to investigate the flow filed around the maglev train during passing, velocity and pressure distributions around vehicles are also presented within 0.0144s after passing. The results show that the flow filed between the two mnglev trains act each other during passing, while the flow filed on the no passing side keep generally unchanged.

关 键 词：磁浮列车 会车压力波 数值计算 移动网格 

分 类 号：U237[交通运输工程—道路与铁道工程]