Numerical Investigation of Aerodynamic Characteristics of High Speed Train

3rd International Conference on Mechanical, Automotive and Aerospace Engineering 2016

机械制造;无线电电子学;航空航天工程

Mohamed Ali, J.S.^1 ; Omar, Ashraf Ali^2 ; Ali, Muhammad 'Atif B.^1 ; Mohd Baseair, Abdul Rahman Bin^1

Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia (IIUM), P.O.Box 10, Kuala Lumpur

50728, Malaysia^1

Department of Aeronautical Engineering, Tripoli University, Libya^2

关键词: Aerodynamic characteristics;    Aerodynamic coefficients;    CFD analysis;    High speed train (HST);    Numerical investigations;    Rolling moment coefficient;    Rolling moments;    Yaw angles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/184/1/012015/pdf
DOI  :  10.1088/1757-899X/184/1/012015

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In this work, initially the effect of nose shape on the drag characteristics of a high speed train is studied. Then the influence of cross winds on the aerodynamics and hence the stability of such modern high speed trains is analyzed. CFD analysis was conducted using STAR-CCM+ on trains with different features and important aerodynamic coefficients such as the drag, side force and rolling moment coefficients have been calculated for yaw angles of crosswinds ranging from 0° to 90°. The results show that the modification on train nose shape can reduce the drag up to more than 50%. It was also found that, bogie faring only reduces small percentage of drag but significantly contributed to higher rolling moment and side force coefficient hence induced train instability.