輪軸回転を考慮した鉄道車両の台車部流れのLES

抄録

The underbody flow of a running railway car is one of the factors of fluid noise and snow accretion. The underbody flow forms a complicated flow field. It is important to reproduce the running condition to investigate its flow filed. In this study, we performed large-eddy simulation of the flow around bogie part of the railway car to investigate the influence of the wheelsets rotation. As a result, it was shown that the flow on the wheelset surface was dragged by the rotating wheelsets and the flow was induced in the bogie part. On the other hand, it was shown that the influence of the rotation of the wheelsets on the flow around the bogie part was small because the width of the wheel and the diamiter of the axel were small.