Study of the effects of the high-speed railway tunnel air shaft of aerodynamic effect

Abstract：The paper adopt three-dimensional compressible unsteady flow model, straggling three-dimensional Navier-stokes equation by finite volume method.The near wall functions is applied to deal with the wall of tunnels.The numerical procedure is based on preconditioned second-order accurate backward difference in time.Numerical Simulate the pressure change introduced by the high-speed train passing through a single-line tunnel with a shaft.Analysis the effects which the different shaft parameter to the change of the pressure.Initially draw the conclusion of the best shaft parameter.The numerical simulate laid the groundwork for future aerodynamic study on the method of alleviate the micro-pressure wave.

Keyword：tunnel;high-speed train;finite volume method;air shaft;micro-pressure wave;