CAJ | 학술논문

燃气属于易燃易爆的危险性气体,当在室内有限空间发生泄漏时,会带来相当严重的后果。针对燃气泄漏扩散的特点,利用 Gambit建立室内燃气灶喷嘴处气体泄漏扩散的物理模型,并结合 CFD 流体动力学软件FLUENT模拟了燃气连续泄漏的扩散过程。对燃气在一定温度梯度、不同湿度条件下的扩散效果进行了对比,并监测了指定安装区域内不同安装点处的浓度,以期达到优化报警器安装位置的目的。结果表明,室内空气的相对湿度和安装位置是影响报警时间的关键因素；在相同安装点,当空气相对湿度增加15%时,报警时间延迟近6 s；在一定的空气相对湿度下,报警器距离泄漏口水平位置增加1 m,报警时间滞后4 s。
연기속우역연역폭적위험성기체,당재실내유한공간발생설루시,회대래상당엄중적후과。침대연기설루확산적특점,이용 Gambit건립실내연기조분취처기체설루확산적물리모형,병결합 CFD 류체동역학연건FLUENT모의료연기련속설루적확산과정。대연기재일정온도제도、불동습도조건하적확산효과진행료대비,병감측료지정안장구역내불동안장점처적농도,이기체도우화보경기안장위치적목적。결과표명,실내공기적상대습도화안장위치시영향보경시간적관건인소；재상동안장점,당공기상대습도증가15%시,보경시간연지근6 s；재일정적공기상대습도하,보경기거리설루구수평위치증가1 m,보경시간체후4 s。
Gas belongs to flammable and explosive hazardous gas.When the leakage of gas occurred in limited indoor space, the serious consequences would be produced.According to the characteristics of the gas leakage diffusion,firstly Gambit was established indoor gas stove nozzle dispersion physical model.Secondly CFD fluid dynamics software FLUENT was used to simulate the diffusion process of continuous leakage.Finally comparing the diffusion results under certain temperature gradient but different moisture conditions,and monitoring the specified installation area with variety of mounting points,the aim was to optimize the installation position of the alarm.The results show that the location of distance and relative humidity of indoor air were both the key factors on affecting the alarm time.For the same mounting points,relative air humidity increasing 1 5%would cause delaying the time of alarm nearly 6 s;under the same air relative humidity,each time the alarm was away from the leaking mouth increasing by 1 metre,alarm time would lag for 4 s.