摘要
针对列车提速所引起的铁路噪声问题,尤其是在高速运行情况下占主导的气动噪声问题。通过对列车模型的气动噪声进行稳态数值模拟分析,探究列车不同速度运行时的表面压力分布情况,从而为列车的车身设计提供参考。在Lighthill声学理论的基础上,采用常用的k-ε模型以及SIMPLE算法进行计算,分别对CRH3列车在300km/h和350 km/h的运行速度下的稳态模拟结果进行分析,研究不同速度下列车头部各部分的流场特征。
Aiming at the problem of railway noise caused by the high train speed, especially the aerodynamic noise prob-lems, through the steady numerical simulation of pneumatic pressure in the front surface of CRH3, the study explores thesurface pressure distribution at different speed of the train, so as to provide reference for the design of train body. Based onLighthi11 acoustic theory, the k - e model and SIMPLE algorithm was adopted to calculate it. The results of the steady nu-merical simulation at the running speed of 300km/h and 350km/h were analyzed, and the flow field characteristics of eachpart of the train head under different velocity were examined.
出处
《现代机械》
2015年第4期25-28,共4页
Modern Machinery
基金
广东省自然科学基金资助项目(06029824)
