Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
A preliminary study on active flow control applied to crosswind stability of high-speed trains
Submission Author:
Alexandre Medina Correa , SP , Brazil
Co-Authors:
Francisco Souza, Carlos Duarte, Alexandre Medina Correa
Presenter: Francisco Souza
doi://10.26678/ABCM.COBEM2017.COB17-1463
Abstract
Unsteady Reynolds-Averaged Navier-Stokes (URANS) simulation is used for analyzing the applicability of active control techniques on improving crosswind stability of trains. The analysis is made for an idealized 1:25 high-speed train model for a Reynolds number of 3.7 x 105, based on the model height. The analysis is based on both momentum injection and suction techniques, the control velocity is set to 1% of the free-stream velocity. The analysis is made for different control locations where it is found that the control applied at the lee-side roof corner renders better results, reducing the lee-rail moment coefficient, mainly responsible for vehicle overturning in critical crosswind conditions.
Keywords
crosswind stability, train aerodynamics, URANS, active flow control
