摘要
对水喷淋作用时液滴与烟气层的相互作用过程进行分析,采用单位体积液滴拖曳力与烟气浮力的比值作为参数,建立了水喷淋作用时烟气层稳定性的判断方法.采用FDS(fire dynamicssimulator)进行模拟计算,对这一判据进行验证.结果表明,当该比值大于1时,烟气“拥塞”将发生;比值小于1时,烟气层将保持稳定.
The interaction of sprinkler spray and smoke was discussed. A new criterium based on the ratio of local spray dragging force to local smoke buoyancy was proposed to analyze the stability of smoke under sprinkler spray. Some numerical studies by FDS （fire dynamics simulator） were conducted to validate the applicability of the criteriurn. It can be concluded that when the ratio is greater than 1, the smoke layer will lose the stability and smoke logging will happen; when the ratio is smaller than 1, the smoke layer will remain stable.
基金
国家自然科学基金重点项目(50536030)资助
关键词
火灾烟气
稳定性
拖曳力
浮力
fire smoke
stability
dragging force
buoyancy
