철도터널 통풍공의 내경변화에 따른 공기역학적 성능

초록

Purpose of the present is to investigate the aerodynamic performances of air-shafts with different inner diameters in a single track tunnel for reducing pressure fluctuations and micro pressure waves. Three configrations od air-shafts with different inner diameters were examined for comparison od aerodynamic performances. Experiments were performaned with a 1/61-scale moving model rig for the tunnel of 0.764km length and the train of 4 cars per 1 unit. The results showed the reduction effect of the maximum pressure fluctuations in tunnel and micro-pressure waves radiating towards the surroundings from the tunnel exit according to the increase of the diameter of 10 air-shafts spaced equally.