Influence of ground effect on flow field structure and aerodynamic noise of high-speed trains
作者机构：Key Laboratory of Intelligent Manufacturing and Service Performance Optimization of Laser and Grinding in Mechanical IndustryHunan Institute of Science and TechnologyYueyang414000China Key Laboratory of Traffic Safety on Track(Central South University)Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha410075China
出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)
年 卷 期：2024年第25卷第2期
页 面：147-160页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）]
基 金：This work is supported by the National Natural Science Foundation of China(No.52272363) the Foundation of the Key Laboratory of Aerodynamic Noise Control(No.ANCL20200302),China
主 题：High-speed train Aero-acoustics Flow field structure Large eddy simulation Moving ground condition Rotating wheel
摘 要：The simulation of the ground effect has always been a technical difficulty in wind tunnel tests of high-speed *** this paper,large eddy simulation and the curl acoustic integral equation were used to simulate the flow-acoustic field results of high-speed trains under four ground simulation systems(GSSs):“moving ground+rotating wheel,“stationary ground+rotating wheel,“moving ground+stationary wheel,and“stationary ground+stationary wheel.By comparing the fluid-acoustic field results of the four GSSs,the influence laws of different GSSs on the flow field structure,aero-acoustic source,and far-field radiation noise characteristics were investigated,providing guidance for the acoustic wind tunnel testing of high-speed *** calculation results of the aerodynamic noise of a 350 km/h high-speed train show that the moving ground and rotating wheel affect mainly the aero-acoustic performance under the train *** influence of the rotating wheel on the equivalent sound source power of the whole vehicle was not more than 5%,but that of the moving ground slip was more than 15%.The average influence of the rotating wheel on the sound pressure level radiated by the whole vehicle was 0.3 dBA,while that of the moving ground was 1.8 dBA.
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