CAJ | 학술논문

为了研究微重力环境下细水雾灭火机理，利用FDS软件对细水雾雾化特征进行了仿真分析，结果表明：微重力环境有利于细水雾的形成和雾场的扩大，但由于没有重力场的作用而使得雾动量下降，导致雾滴穿透火焰的能力下降。通过对载人航天器密封舱内细水雾灭火的仿真计算，获得了火灾场特征位置处的温度及氧浓度（指体积分数）随时间变化规律，分析表明细水雾灭火不仅可以降低火焰的温度，而且还可通过稀释火灾场的氧浓度对火灾起到很好地抑制作用。
위료연구미중력배경하세수무멸화궤리，이용FDS연건대세수무무화특정진행료방진분석，결과표명：미중력배경유리우세수무적형성화무장적확대，단유우몰유중력장적작용이사득무동량하강，도치무적천투화염적능력하강。통과대재인항천기밀봉창내세수무멸화적방진계산，획득료화재장특정위치처적온도급양농도（지체적분수）수시간변화규률，분석표명세수무멸화불부가이강저화염적온도，이차환가통과희석화재장적양농도대화재기도흔호지억제작용。
A simulation model of water mist is established to study the fire extinguishment mechanism in case of a fire under the micro-gravity environment. Atomizing characteristics of the water mist are investigated under different gravity environments by the FDS. It is found that the spray momentum is reduced under the micro-gravity environment, but the scope of protection is increased. Numerical simulations of the fire being suppressed by the water mist in a typical manned spacecraft are carried out, and the temperature and the oxygen concentration against time are obtained. It turns out that the water mist can suppress the fire by flame cooling and oxygen dilution effectively.