Numerical and experimental investigation on snow accumulation on bogies of high-speed trains

高速列车转向架积雪的数值与试验研究

This paper reviews the current status of investigation on snow accumulation on the bogies of high-speed trains(HSTs) running in snowy region. First, the background of the snow issue occurring to the HST and the contra-measures for the snow issue proposed in the past decades are provided by reviewing previous studies. Next, the methodology for investigating the snow issue developed by High-Speed Train Research Center of Central South University is introduced, including the numerical simulation research platform and the experimental devices for two-phase flow wind tunnel tests. Then, effective anti-snow flow control schemes for guiding the underbody airflow and their impact on the motion and accretion of snow in the installation region of the bogies are presented. Finally, the remaining investigating challenge for the snow issue of HST and the future research with respect to the challenge are provided from an engineering application viewpoint.

本文综述了降雪区域高速列车转向架积雪问题研究的现状。首先,通过回顾前人研究,调研了高速列车积雪问题产生的背景和近几十年来提出的应对措施。其次,介绍了中南大学高速列车研究中心关于积雪结冰问题的研究方法,包括针对连续相和两相流风洞试验的数值模拟研究平台和实验装置。在此基础上,提出了引导车体底部气流的有效防积雪流动控制方案及其对转向架安装区域积雪运动和累积的影响。最后,从工程应用的角度,提出了高速铁路积雪结冰问题尚待解决的问题与挑战和展望。