본 연구는 성능적인 피난안전설계에 있어서 스프링클러를 응용한 설계를 위하여 스모크로깅현상에 대한 연기층 하강기류에 대해 고찰하였다. 이를 위해 PIV(particle image velocimetry)장비를 이용하여, 국내 스프링클러 헤드별 분무액적특성을 실험적으로 고찰하고, 화원의 크기 및 스프링클러 헤드의 종류에 따른 연기층의 하강기류를 분석하였다. 그 결과, 평균입경, 입자속도, 살수분포에 관한 데이터를 얻었으며, 살수량과 입경과의 관계를 얻었다. 또한 하강기류에 관하여, 하강기류속도가 0.6 m/s이 되면 연기층이 하부층으로 이동하는 것을 확인하였으며, 100 kW 이상의 화원크기가 존재하여야 안정적인 하강기류가 발생하는 것을 확인하였다.
This study contemplated the descending air current from the smoke layers related to the smoke logging phenomenon in the sprinkler applied design for effective evacuation safety design. To do this, using the PIV(Particle Image Velocimetry) device, the property of watering spray for each sprinkler head types available in Korea were experimented and the descending air current from smoke layers for each size of fire source or the type of sprinkler head was analyzed. As a result, database on the average particle diameter, particle velocity and distribution of sprinkling was obtained and the relationship between the water amount and particle diameter was obtained. Also, in relation to descending air current, the movement of smoke layer to the bottom at the descending air current velocity of 0.6m/s was observed and stable descending air current was observed in existence of fire source over 100kW in size.
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