기존선 터널 출구 미기압파 저감을 위한 터널 후드의 수치 해석적 연구

초록

The Korean Tilting Train eXpress may produce a strong micro-pressure wave in tunnel exit because of large train/tunnel area ratio of conventional railways. This micro-pressure wave causes an impulsive noise which is a serious environmental noise pollution near tunnel exit. Tunnel hood can be the method of reducing the micro-pressure wave in tunnel exit. Therefore, parametric studies for tunnel hood are performed with respect to the hood length and size to investigate the effects of the tunnel hood. Also, axi-symmetric unsteady compressible flow solver was used to analyze train-tunnel relative motion. According to the result of numerical analysis, the maximum micro-pressure wave in tunnel exit is reduced by 56% throughout the hood establishment on conventional railways.

키워드