中南大学学报（自然科学版）2024，Vol.55Issue(5)：1665-1677,13.DOI:10.11817/j.issn.1672-7207.2024.05.001
运动边界对高寒动车组转向架区域风雪运动的影响
Influence of moving boundary conditions on the motion characteristics of wind and snow in the bogie regions of alpine high-speed trains
摘要
Abstract
The unsteady Reynolds-averaged Navier-stokes(URANS)method based on the Realizable k-εturbulence model and the discrete phase model(DPM)were employed to investigate the influence of motion boundaries on the aerodynamic characteristics and snow distribution in the steering gear area of high-speed trains.The results show that the movement of the ground effectively mitigates the flow kinetic energy attenuation effect underneath the steering gear,which significantly increases the flow velocity distribution in the steering gear zone 2 and affects the vertical velocity distribution of snow particles.This leads to a 33.6%reduction in the snow mass on the surface of steering gear 1 and a 20.1%increase in the snow mass on the surface of steering gear 2.The rotation of the train wheelsets does not impact the snow distribution on the bottom surface of the steering gear,but it causes a significant increase in the vertical velocity of snow particles around the rear end plate,and thereby increases the snow distribution on the upper surface of the steering gear.Compared to rotating wheelsets,stationary wheelsets reduce the snow masses on the traction motor,gearbox,frame and rear end plate surfaces by 1.5%,2.9%,3.4%and 6.4%,respectively,resulting in an overall 3.2%decrease in the total snow mass on the surface of steering gear 2.Therefore,in the numerical simulation and wind tunnel experiments of snow accumulation in the steering gear area of high-speed trains,it is essential to achieve the relative motion between the steering gear,ground,and wheelsets as accurately as possible.关键词
高速列车/转向架区域/风雪流/运动边界/数值模拟Key words
high-speed train/bogie region/wind and snow flow/moving boundary/numerical simulation分类
交通工程引用本文复制引用
王家斌,刘浩源,刘操,商雯斐,张琰,高广军..运动边界对高寒动车组转向架区域风雪运动的影响[J].中南大学学报（自然科学版）,2024,55(5):1665-1677,13.基金项目
国家自然科学基金资助项目(52202429) （52202429）
湖南省自然科学基金资助项目(2023JJ40747) （2023JJ40747）
中国空气动力研究与发展中心结冰与防除冰重点实验室开放课题(IADL20220106)(Project(52202429)supported by the National Natural Science Foundation of China （IADL20220106）
Project(2023JJ40747)supported by the Natural Science Foundation of Hunan Province （2023JJ40747）
Project(IADL20220106)supported by the Key Laboratory of Icing and Anti/Deicing of CARDC) （IADL20220106）
