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首页> 外文期刊>Journal of Fire Sciences >Flame Spread in Opposed Flow along the Ground Soaked with High-volatile Liquid Fuel
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Flame Spread in Opposed Flow along the Ground Soaked with High-volatile Liquid Fuel

机译：火焰在高流动性液体燃料浸透的地面对流中传播

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摘要

The flame spread in opposed flow through the layered flammable gas mixture along the ground soaked with high-volatile liquid fuel was studied experimentally. The effects of opposed flow velocity on the aspect of flame spread, the velocity of flame spread, the thickness of flammable gas layer and the preheated distance ahead of the flame leading edge were investigated experimentally. If the velocity of opposed flow at about 1 mm above the ground surface is over the flame spread velocity with no surrounding airflow, no flame spread occurs even when the ground temperature is highly above the flash point of the spilled liquid fuel. The velocity of opposed flow has a large effect on the preheat distance ahead of the flame leading edge also. With increase in the velocity of opposed flow, the maximum preheat distance decreases to the local minimum, and increases to the local maximum thereafter. This is due to the balance between the convective cooling by the flow and the heat conduction through the ground beneath the inclined flame in downstream.
机译：实验研究了相反的火焰在浸泡有高挥发性液体燃料的地面上沿层状可燃气体混合物反向流动的过程。实验研究了逆流速度对火焰蔓延，火焰蔓延速度，可燃气体层厚度以及火焰前缘预热距离的影响。如果在地面以上约1毫米处的逆流速度超过火焰蔓延速度而没有周围气流，则即使地面温度大大高于溢出的液体燃料的闪点，也不会发生火焰蔓延。逆流的速度对火焰前缘之前的预热距离也有很大影响。随着逆流速度的增加，最大预热距离减小到局部最小值，此后增大到局部最大值。这是由于流动的对流冷却与下游的倾斜火焰下方通过地面的热传导之间的平衡所致。

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