Numerical simulation of snow accumulation in bogie area of high-speed trains in CFD-DEM method

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-01 DOI:10.1016/j.jweia.2024.106000

Lan Zhang , YuZhe Ma , Jiye Zhang , Tian Li

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引用次数: 0

Abstract

When operating in cold weathers, high-speed trains may find snow and ice building up in their bogie areas, thus deteriorating the vehicle's dynamic performance. Based on the Unsteady Reynolds-Averaged Navier-Stokes equation (URANS) in combination with the Discrete Element Method (DEM), this study simulated the motion of snow particles in the bogie area for 1 s, with the Johnson-Kendall-Roberts (JKR) contact model deployed to calculate the force of the snow particles on the wall and identify whether they would adhere to the wall. In addition, this study explored the following two aspects' influence on the movement of snow particles and the snow accumulation in the bogie area: the elastic modulus of snow particles, and the surface energy of interfaces between snow particles and the wall. It is found in this study that increased elastic modulus of snow particles can effectively prevent snow particles from entering the bogie area. According to the simulation results, when the elastic modulus of snow particles is increased from 0.1Mpa to 1Mpa and 10Mpa, the snow particles entering the bogie area would be reduced by 15.6% and 30.4%, and the snow particles adhering to the bogie area by 44.3% and 48.1%, respectively. Furthermore, when the interfacial surface energy between snow particles and the wall is decreased from 0.13J/m² to 0.075J/m² and 0.02J/m², the adhesion on the bogie would be diminished by 50.4% and 73.8%, and the adhesion on the bogie cavity wall by 28.5% and 32.4%, respectively.

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高速列车转向架区域积雪的CFD-DEM数值模拟

在寒冷天气下运行时，高速列车可能会在转向架区域发现积雪和冰，从而恶化车辆的动力性能。本研究基于非定常reynolds -平均Navier-Stokes方程（URANS），结合离散元法（DEM），模拟了转向架区域1 s内雪粒的运动，采用Johnson-Kendall-Roberts （JKR）接触模型，计算雪粒在转向架壁上的作用力，并确定其是否会粘附在壁上。此外，本研究还探讨了以下两个方面对转向架区域雪粒运动和积雪堆积的影响：雪粒的弹性模量和雪粒与壁面界面的表面能。本研究发现，增大雪粒弹性模量可以有效防止雪粒进入转向架区域。仿真结果表明，当雪粒的弹性模量从0.1Mpa增加到1Mpa和10Mpa时，进入转向架区域的雪粒减少15.6%和30.4%，附着在转向架区域的雪粒分别减少44.3%和48.1%。当雪粒与转向架壁面界面能从0.13J/m2降低到0.075J/m2和0.02J/m2时，转向架壁面黏附力分别降低50.4%和73.8%，转向架空腔壁面黏附力分别降低28.5%和32.4%。

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.