湖南大学学报（自然科学版）2025，Vol.52Issue(6)：1-13,13.DOI:10.16339/j.cnki.hdxbzkb.2025171
城际动车组永磁直驱转向架区域积雪仿真研究
Simulation Study of Snow Accumulation on Permanent Magnet Direct-drive Bogies Region for Intercity EMU
摘要
Abstract
To investigate the issue of snow accumulation and icing in the region of the permanent magnet direct-drive(PMD)bogie of an intercity EMU(electric multiple unit),this study employs a full-scale three-car model of a specific intercity EMU.Using the Realizable k-ε turbulence model with the unsteady Reynolds-averaged Navier-Stokes(URANS)method and the discrete phase model(DPM),the snow and wind movement characteristics in the PMD bogie region and the conventional bogie region were simulated under conditions of-30℃ambient temperature and an operating speed of 160 km/h.The research results show that,compared to the conventional bogie,the PMD bogie exhibits a less complex flow field structure with smoother airflow.Although the total snow accumulation in the PMD bogie region is higher,after accounting for the snow adhered to the motor,the overall snow accumulation is reduced by 23.83%,and the snow accumulation on the brake calipers is reduced by 78.368%.Thus,it can be concluded that a significant portion of the snow in the PMD bogie area adheres to the surface of the permanent magnet direct-drive motor,with relatively little snow accumulation on other components,especially the brake calipers.Considering that the heat generated by the motor during operation can melt the snow on its surface,the snow accumulations on the motor surface.Based on these properties,the direct-drive configuration of the intercity EMU bogie offers a notable advantage in mitigating snow accumulation and icing issues.关键词
城际动车组/永磁直驱/转向架/积雪/数值模拟Key words
intercity EMU/permanent magnet direct-drive/bogie/snow accumulation/numerical simulation分类
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姜琛,何龙凤,李岩松,龙金兰,王家斌,刘明杨..城际动车组永磁直驱转向架区域积雪仿真研究[J].湖南大学学报（自然科学版）,2025,52(6):1-13,13.基金项目
国家重点研发计划资助项目(2020YFA0710901),National Key Research and Development Program of China(2020YFA 0710901) （2020YFA0710901）
国家自然科学基金资助项目(12372204),National Natural Science Foundation of China(12372204) （12372204）
湖南省自然科学基金资助项目(2023JJ30643),Natural Science Foundation of Hunan Province(2023JJ30643) （2023JJ30643）
