수도권광역급행철도 A 라인 GTX 차량의 기밀도 요구성능 연구

초록

GTX passenger train is planning to operated as an intercity mass transit railway system with maximum running speed of 180km/h (maximum design speed 200km/h) in the deep underground tunnel network(A line is about 74.8km). High speed train maintains the air-tightness to shut off HVAC system from the pressure transients in tunnel. However, GTX operation environment need continuous ventilation to control indoor air quality of passenger car and thus some difficulty is expected to preserve air-tightness performance. With a careful consideration of the real operation environment of GTX A line, pressure transients in tunnel and passenger car is predicted using advanced CFD technology and the required air-tightness of car is predicted as 3 second and 6 second respectively in the single track and double track tunnel to prevent passenger’s aural discomfort. The result of this study is expected as useful information to develop various solutions improving air-tightness of GTX passenger car.