Numerical Study on Reduction in Aerodynamic Drag and Noise of High-Speed Pantograph  

作　　者：Deng Qin Xing Du Tian Li Jiye Zhang 

机构地区：[1]State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu,610031,China [2]School of Electrical Engineering,Southwest Jiaotong University,Chengdu,610031,China

出　　处：《Computer Modeling in Engineering & Sciences》2024年第5期2155-2173,共19页工程与科学中的计算机建模（英文）

基　　金：supported by National Natural Science Foundation of China(12372049);Science and Technology Program of China National Accreditation Service for Confor-mity Assessment(2022CNAS15);Sichuan Science and Technology Program(2023JDRC0062);Independent Project of State Key Laboratory of Rail Transit Vehicle System(2023TPL-T06).

摘　　要：Reducing the aerodynamic drag and noise levels of high-speed pantographs is important for promoting environmentally friendly,energy efficient and rapid advances in train technology.Using computational fluid dynamics theory and the K-FWH acoustic equation,a numerical simulation is conducted to investigate the aerodynamic characteristics of high-speed pantographs.A component optimization method is proposed as a possible solution to the problemof aerodynamic drag and noise in high-speed pantographs.The results of the study indicate that the panhead,base and insulator are the main contributors to aerodynamic drag and noise in high-speed pantographs.Therefore,a gradual optimization process is implemented to improve the most significant components that cause aerodynamic drag and noise.By optimizing the cross-sectional shape of the strips and insulators,the drag and noise caused by airflow separation and vortex shedding can be reduced.The aerodynamic drag of insulator with circular cross section and strips with rectangular cross section is the largest.Ellipsifying insulators and optimizing the chamfer angle and height of the windward surface of the strips can improve the aerodynamic performance of the pantograph.In addition,the streamlined fairing attached to the base can eliminate the complex flow and shield the radiated noise.In contrast to the original pantograph design,the improved pantograph shows a 21.1%reduction in aerodynamic drag and a 1.65 dBA reduction in aerodynamic noise.

关 键 词：High-speed pantograph aerodynamic drag aerodynamic noise REDUCTION optimizing 

分 类 号：O24[理学—计算数学]