油罐火灾中邻近罐罐壁冷却温度变化规律研究

Study on the cooling temperature variation of tank surfaces subjected to tank fire

利用温度分布均匀的钢板模拟邻近油罐壁,并进行了冷却实验,分析邻近油罐罐壁在不同冷却水流量及辐射热作用下冷却时温度随时间变化的规律。实验结果表明,同一供水流量冷却条件下,辐射热越大,水的吸收能力越弱,反射能力越强,稳定平衡温度越低;供水强度越大,冷却速率越快,但在达到一定值时,效果差异很小;冷却条件下,罐壁最终达到高于环境温度的稳定温度,且辐射热和供水强度大小对稳定温度有影响。

Utilizing the steel plate with symmetrical temperature to simulate the tank surface subjected to tank fire,cooling experiments are carried out to analyze the rules tank surface temperature changing with time under different water flow rate and radiate heat.Results indicate that with the same water flow rate,the absorbency of the water decreases with the radiate heat increasing,while its capability of reflecting increase,and the stable temperature gets lower;the bigger the flow rate of the water,the faster the cooling rate,while the difference is small when the flow rate reaches some level;the temperature of the tank surface ultimately reaches a steady temperature higher than environment temperature,and the temperature changes with the influence of thermal radiation and the intensity of water supply.