高速列车车头曲面脉动压力的大涡模拟

被引:9
作者
肖友刚 [1 ]
张晓缝 [2 ]
康志成 [3 ]
机构
[1] 中南大学轨道交通安全教育部重点实验室
[2] 长沙环境保护职业技术学院
[3] 井冈山大学工学院
基金
湖南省自然科学基金;
关键词
高速列车; 车头曲面; 脉动压力; 大涡模拟;
D O I
10.15961/j.jsuese.2010.01.016
中图分类号
U270.1 [车辆理论及试验];
学科分类号
080204 ; 082304 ;
摘要
为了得出车头曲面脉动压力的分布规律,利用参数变换技术,生成了高速列车车头曲面的四边形贴体网格,进而生成了高速列车头部流场的六面体网格。对车头流线型曲面的脉动压力进行了大涡模拟,得出了脉动压力的分布特性:在流场中某点处产生的压力主要影响该处本地,而对其余点的影响作用则随着距离的增加而迅速减弱;脉动压力的频带很宽,无明显的主频率。各点脉动压力的频谱在低频时幅值较大,随着频率升高,幅值以负指数规律持续下降。脉动压力1/3倍频程频谱的主要能量集中在20~500Hz频率范围内,随着列车运行速度提高,频谱的主要能量范围有向高频移动的趋势。
引用
收藏
页码:227 / 232
页数:6
相关论文
共 11 条
[1]  
Wall pressure fluctuations induced by separated/reattached channel flow. Brungart,TA,Lauchle,GC,Deutsch,S,Riggs,ET. Journal of Sound and Vibration . 2002
[2]  
Numerical analysis of aerodynamic noise radiation from a high-speed train surface. Sassa T,Sato T,Yatsui S. Journal of Sound and Vibration . 2001
[3]  
Localization of aerodynamic noise sources of Shinkansen trains. K.Nagakura. Journal of Sound and Vibration . 2006
[4]  
Surface Gird Generation in a Parameter Space. Jamshid Samareh-Abolhassani and John E.E. Journal of Computational Physics . 1994
[5]  
Stability of the dual Navier-Stokes equations and efficient computation of mean output in turbu-lent flow using adaptive DNS/LES. Hoffman J,Johnson C. Computer Methods . 2006
[6]  
Predicting the wind noise from thepantograph cover of a train. Holmes B,Dias J. International Journal forNumerical Methods in Fluids . 1997
[7]  
Aerodynamic noise of high-speed railway cars. Moritoh Y,Zenda Y. Japanese Railway Engineering . 1994
[8]  
WALL PRESSURE FLUCTUATIONS OF TURBULENT FLOW OVER BACKWARD-FACING STEP WITH AND WITHOUT ENTRAINMENT: MICROPHONE ARRAY MEASUREMENT[J]. KE Feng, LIU Ying-zheng, WANG Wei-zhe,CHEN Han-ping School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China. Journal of Hydrodynamics(Ser.B). 2006(04)
[9]  
Localization of aerodynamic noise sources of Shinkansen trains[J] . K. Nagakura. &nbspJournal of Sound and Vibration . 2006 (3)
[10]   Numerical analysis of aerodynamic noise radiation from a high-speed train surface [J].
Sassa, T ;
Sato, T ;
Yatsui, S .
JOURNAL OF SOUND AND VIBRATION, 2001, 247 (03) :407-416