CAJ | 학술논문

以某62 m 高封闭式中庭为对象，建立了火灾排烟盐水模型实验台，用盐水和清水密度差导致的水流运动模拟实际建筑中热烟气与冷空气之间密度差导致的热羽流的运动。利用 FDS 软件对实际火灾时烟气的运动情况进行了模拟。模拟结果和实验结果的比较表明，盐水实验虽然忽略了探测器达到探测阈值的时间延迟及竖壁冷对流的影响，但对热分层高度和达到稳定时间的预测偏差很小。在1 MW 火灾规模下，利用盐水实验方法对该封闭中庭火灾烟气运动规律和排烟系统设置进行评价分析是可行的。
이모62 m 고봉폐식중정위대상，건립료화재배연염수모형실험태，용염수화청수밀도차도치적수류운동모의실제건축중열연기여랭공기지간밀도차도치적열우류적운동。이용 FDS 연건대실제화재시연기적운동정황진행료모의。모의결과화실험결과적비교표명，염수실험수연홀략료탐측기체도탐측역치적시간연지급수벽랭대류적영향，단대열분층고도화체도은정시간적예측편차흔소。재1 MW 화재규모하，이용염수실험방법대해봉폐중정화재연기운동규률화배연계통설치진행평개분석시가행적。
Establishes a salt-bath experimental system to study the indoor fire-smoke movement in a 62 meter high enclosed atrium.Smoke movement driven by the thermal plume by the density difference between thermal smoke and cold air in the prototype building is modeled by water flow movement by the density difference between brine water and fresh water in the scaled model.Simulates the smoke movement in actual fire situation with the FDS software.The comparison of the simulation and the experiment results shows that though the salt-bath experiment ignores the effect of both the time lag by the smoke detector and the cooling convection along the atrium wall,the prediction deviations of thermal stratification height and the time to stabilization state are small.For a fire with the intensity of 1 MW,it is practicable to apply the salt-bath experimental method to predict the fire-smoke movement characteristics in the enclosed atrium and estimate the performance of the exhaust system.