Search

This paper presents a the study on air curtain system of top and bottom bi-directional jet air discharge for blocking the spread of smoke in case of tunnel fire. The five kinds different air curtains of A, B, C, D, and E of models for various performance tested after manufactured. A results of the various performance test obtained the best efficiency from E model air curtain. And optimize the injection angle of the air curtain nozzle through the three-dimensional computational fluid dynamics (CFD) analysis and analyzed the effects of external pressure of tunnel. and also single factor design have been applied. At present, our attention is focused on the velocity distribution(flow width and flow position) of 1.5m on the ground in tunnel. Also, analyzed the influence of draft in the tunnel. Detailed effects of discharge angle of air curtain and velocity at nozzle exit are discussed. 1. 서 론 터널 방연 에어커튼이란 터널 내부에서 화재가 발생했을 때 운전자들이 안전하게 대피할 수 있는 피난공간을 확보하기 위해 고압 공기를 분사해 화재시 발생되는 유독성 연기를 차단하는 시설이다. 현재 전국 고속도로 상에 있는 500 ∼1,000m 터널 123개소 가운데 93개소의 터널에는 피난연결통로가 설치되지 않은 것으로 파악됐다.