터널용 가역축류송풍기 S형 이중 원호익의 공력 및 기하학적특성 연구

The reversible axial Fan is installed or applied in 40~70m depth of underground subway, GTX, underground expressway, or road tunnel which has more than 4㎞ length with transverse ventilation system, in general. In this study, 'S' shaped blade with double circular arc, axial blade with NACA-65 series and symmetrical axial blade were tested and compared in considering of aerodynamic and geometric properties. The test method complied to the AMCA standard and the tests were conducted in laboratory accredited in AMCA International, Inc. As the test results, the axial fan which has newly designed 'S' shaped blade with double circular arc is better than reversible axial fan which is being sold in the domestic.