水平开口对受限腔室内的火灾参数的影响
首发时间:2015-08-03
摘要:本文研究了水平开口对受限腔室内的火灾参数的影响。实验中采用了五种不同直径的油盘和六种不同大小开口,同时测量了质量损失、氧气浓度、腔室内的温度以及腔室上部和下部的压力差。研究结果表明,质量损失速率会随着水平开口增大,熄火时刻的氧气浓度在大开口情况下保持恒定。开口大小还会影响腔室内的烟气层界面,且平均温升速率随着开口的增加呈现二项式分布。此外,腔室内的压力差随着油盘尺寸地增加而增加。
关键词: 平开口 受限腔室 质量损失速率 氧气浓度 温度分布
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Effect of horizontal opening on the fire parameters in the confined compartment
Abstract:This paper involves an experimental study of horizontal opening effect on the fire parameters in a confined compartment. Five pan diameters and six horizontal opening sizes were adopted and measurements included mass loss, oxygen concentration, temperature in the compartment and pressure difference at the top and bottom of compartment. Results show that the mass loss rate rises with the horizontal opening, and the oxygen concentration at extinction time keeps stable under larger openings. Then, the opening size affects the smoke layer interfaces in the compartment, and the average temperature rise rate presents a quadratic relationship with the increasing horizontal opening. Moreover, the pressure difference in the compartment rises with the increasing pool size.
Keywords: khorizontal opening confined compartment mass loss rate oxygen concentration temperature profile
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No.4650905941029143****
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