北京交通大学学报2023，Vol.47Issue(5)：82-90,9.DOI:10.11860/j.issn.1673-0291.20220014
不同侧滑角下列车侧壁和空调外形对列车气动性能的影响
Impact of changes in sidewall and air conditioner profiles on train aerodynamic performance under different yaw angles
摘要
Abstract
To determine the optimal body shape for a specific power-distributed high-speed train,this paper employes a three-dimensional incompressible Unsteady Reynolds Averaged Navier-Stokes(URANS)method and the Shear Stress Transport(SST)k-w turbulence model.Three train body and air conditioner profiles are considered:a flat wall with a high air conditioner,a bulging wall with a high air conditioner,and bulging wall with a low air conditioner.This paper analyzes the train's aerody-namic coefficients and the average pressure on windows and air conditioner under eight different operat-ing conditions with yaw angles of 0°,20°,40°,45°,55°,60°,70°,and 90° at a combined wind speed of 60 m/s.The results show that at yaw angles less than 20°,there is minimal impact on the train's aerodynamic performance based on different sidewall and air conditioner profiles.As the yaw angle in-creases,the aerodynamic performance of the flat wall with high air conditioner profile deteriorates in comparison to the bulging wall with high air conditioner and bulging wall with low air conditioner pro-files.For instance,at a yaw angle of 55°for the lead car,the side force coefficient,lift coefficient,and rolling moment coefficient of the bulging wall with high air conditioner profile are reduced by 23.3%,3.4%,and 27.3%,respectively,compared to the flat wall with high air conditioning profile.Further-more,regarding the leeward side window pressure,both the bulging wall with high air conditioner and bulging wall with low air conditioner profiles experience approximately a 59%reduction compared to the flat wall with high air conditioner profile.Overall,the bulging wall with low air conditioner profile exhibits the best aerodynamic performance.关键词
侧风/列车气动特性/车身外形/空调/计算流体力学Key words
crosswind/train aerodynamic performance/body profile/air conditioner/computational fluid dynamics分类
交通工程引用本文复制引用
于淼,耿亚彬,陈争卫..不同侧滑角下列车侧壁和空调外形对列车气动性能的影响[J].北京交通大学学报,2023,47(5):82-90,9.基金项目
国家自然科学基金(52202426) （52202426）
国家重点研发计划(2017YFB1201304) （2017YFB1201304）
广东省基础与应用基础研究基金(2021B1515130006)National Natural Science Foundation of China(52202426) （2021B1515130006）
National Key R&D Plan(2017YFB1201304) （2017YFB1201304）
Guangdong Ba-sic and Applied Basic Research Fund(2021B1515130006) （2021B1515130006）
