Techno Press
You logged in as Techno Press

Wind and Structures
  Volume 18, Number 5, May 2014, pages 529-548
DOI: http://dx.doi.org/10.12989/was.2014.18.5.529
 


Numerical calculations of aerodynamic performance for ATM train at crosswind conditions
Mohammad Ali Rezvani and Masoud Mohebbi

 
Abstract
    This article presents the unsteady aerodynamic performance of crosswind stability obtained numerically for the ATM train. Results of numerical investigations of airflow past a train under different yawing conditions are summarized. Variations of occurrence flow angle from parallel to normal with respect to the direction of forward train motion resulted in the development of different flow patterns. The numerical simulation addresses the ability to resolve the flow field around the train subjected to relatively large yaw angles with three-dimensional Reynolds-averaged Navier-Stokes equations (RANS). k-eturbulence model solved on a multi-block structured grid using a finite volume method. The massively separated flow for the higher yaw angles on the leeward side of the train justifies the use of RANS, where the results show good agreement with verification results. A method of solution is presented that can predict all aerodynamic coefficients and the wind characteristic curve at variety of angles at different speed.
 
Key Words
    high speed train; aerodynamic performance; crosswind condition; numerical simulation
 
Address
Mohammad Ali Rezvani and Masoud Mohebbi : School of Railway Engineering, Iran University of Science and Technology,
Tehran, Iran, 16846-13114
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2021 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com