Numerical Simulations of the Wind Tunnel Tests on the Aerodynamic Characteristics of Trains in the Crosswind

摘要

To evaluate the running safety of railway vehicles exposed to strong winds, it is necessary to estimate the aerodynamic forces acting on trains. Numerous wind tunnel tests have already been conducted for this purpose. Meanwhile, computational simulations have been applied to engineering problems using high-performance computers in recent years. This report describes computational fluid dynamic simulations (RANS on unstructured grids and LES on Cartesian grids) that were carried out to reproduce wind tunnel tests. It compares the aerodynamic force coefficients obtained through simulations to those obtained in wind tunnel tests.