LES of Airflow Distribution for CRH₂ Electric Motor Train Units

Abstract:

In the premise of parallel computing, large eddy simulation (LES) model was adopted to set up math formers for the characteristics of airflow origination in CRH₂ Electric Motor Train Units(EMU) in this paper. The Smagorinsky-Lilly dynamic sub-grid model was adopted for fitting local turbulent structure and confirming benchmark model coefficient. Amended balance layer model was used to the wall functions. The temperature and velocity fields in the compartments were numerically simulated. Furthermore, area discretization adopted finite volume method. The results showed, adopting the method of enlarging calculation region, the instantaneous and continuity of turbulence were reflected truly and accurately. The analysis provided a reference for LES of airflow organization in high-speed train. It was also a new reference for the evaluation of comfort environment in the train.

• Periodical: Applied Mechanics and Materials (Volumes 687-691)
• Pages: 109-112
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.687-691.109
• Online since: November 2014
• Authors: Zhong Zan Wang, Zhao Hui Qi, Hui Tian
• Keywords: Airflow Distribution, CRH₂ Electric Motor Train Units, Large Eddy Simulation (LES), Parallel Computing, Turbulent Organization

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