摘要
针对细水雾灭火在载人航天器安全中的应用,采用计算流体动力学(CFD)的方法进行了研究.在建立压力旋流喷嘴液膜式雾化模型及微重力场雾滴运动轨迹模型的基础上,利用计算流体动力学仿真软件FLUENT中的离散相模型(DPM)分析了微重力状态下细水雾雾场特性,包括微重力下细水雾的雾化图形、速度以及雾粒直径分布.仿真结果表明:微重力下细水雾雾场特性与常重力下有明显差异,雾场呈现弥散云团状分布,并且雾粒直径大于常重力下的雾粒直径,研究成果对航天细水雾灭火系统的研制奠定了一定的基础.
Computational fluid dynamics（CFD） method was implemented to study the fine water mist in the fire protection of manned spacecraft.The sheet atomization model of pressure-swirl atomizer and the motion model of mist particle were built.Discrete phase model（DPM） was used to simulate the characteristic of fine water mist field in microgravity.The atomization graph,velocity and the particle size distribution of fine water mist in microgravity was simulated.Results have shown that the characteristic of fine water mist field is obviously different between in normal and micro gravity.The latter one is a distributed and quiescent cloud of droplets,and particle size rise to a higher level.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第10期6-9,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
航天科技创新基金资助项目
921工程资助项目
关键词
航天安全
计算流体动力学
微重力
细水雾
雾场特性
离散相模型
aerospace safety
computation fluid dynamics
microgravity
water mist
mist field characteristic
discrete phase model（DPM）
