梁天水;孟子龙;于晶晶;耿丽红;钟委;

• 1:郑州大学化工与能源学院

摘要(Abstract)：

针对细水雾灭火技术在载人航天器安全中应用的可行性,通过理论分析研究了微重力环境下液滴滞止距离与初始速度、粒径的关系,并利用Fluent模拟研究了水雾喷嘴雾场结构。理论分析结果表明,初始速度一定,水雾粒径越小,其滞止距离也越短;初始速度越大,其滞止距离越长。粒径小于50μm时,初始速度对滞止距离影响不大。数值模拟结果表明,微重力下的雾场分布与常重力下有明显差异,水雾主要集中在喷嘴附近,而且水雾蒸发速率较慢,液滴存活时间长。对比理论分析和模拟结果,模拟的迁移距离要小于理论值,这是因为理论分析中忽略了液滴的蒸发。为解决液滴滞止的问题,建议微重力环境下采取气体载运水雾的方式。

关键词(KeyWords)： 安全工程;细水雾;微重力环境;滞止距离

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51404215);; 中国博士后科学基金项目(2014M550386);; 中国科学技术大学火灾科学国家重点实验室开放课题(HZ2012-KF01)

作者(Authors): 梁天水;孟子龙;于晶晶;耿丽红;钟委;

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