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大尺度连续泄漏航空煤油流淌火热辐射模型研究 认领

Study on thermal radiation model of large-scale continuously released jet fuel spill fire
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摘要 航空煤油储运过程中因泄漏引发的火灾爆炸事故导致严重危害,流淌火是油料燃烧和流淌的复杂过程。为保证航空煤油储运安全和机场消防的安全,对连续泄漏的航空煤油流淌火的热辐射进行研究。为此设计并搭建流淌火燃烧试验平台,以航空煤油为试验油料,选择水平表面0°(流淌试验为基准),改变坡度,开展大尺度连续泄漏航空煤油流淌火试验。测量燃油泄漏速率、泄漏时间以及流淌火的辐射热流等,分析不同泄漏速率下连续泄漏航空煤油的辐射热流密度,建立航空煤油流淌火固体火焰模型并研究坡度的影响。结果表明:可将矩形油槽内的航空煤油流淌火看作长方体固体火焰模型,估算出大尺度航空煤油流淌火的表面发射功率约为25.7 kW/m~2;流淌火的热辐射热流强度的实测值与经验值相吻合;对比坡度工况,水平工况下对于辐射热流强度的预测更准确。结合固体火焰辐射模型的计算结果和人体受热辐射的伤害判定标准,可以预测不同时刻溢油流淌火周围的安全距离。 Fire and explosion accidents caused by leakage during the storage and transportation of jet fuels will lead to serious harm and damage to facilities. Spill fire is a complex process of oil combustion and flow coupling. For the sake of ensuring the safety of jet fuel storage and transportation and fire safety in airports, the thermal radiation of continuously released jet fuel spill fire was studied. An experimental platform was designed and built for jet fuel spill fires. The jet fuel was selected as the fuel in the continuous spill fire, and the horizontal surface(with the slope angle 0°) was taken as the baseline case. Then the experiment on the large-scale continuously released jet fuel spill fire was performed with different substrate slopes. The radiant heat flux of spill fires was measured as well as the leakage rate, the leakage time, et al., and the thermal radiation intensity of continuous leakage of jet fuel with different leakage rates was analyzed. A solid flame model for continuous jet fuel spill fire was established and the effect of substrate slope on the thermal radiation was examined. The results show that the jet fuel spill fire in a rectangular oil tank can be regarded as a cuboid solid flame model. Based on this model, the surface emission power of the solid flame model is estimated to be about 25.7 kW/m~2. The thermal radiation intensity of the spill fire measured by the experiment agrees well with the empirical value. By comparing different conditions of jet fuel spill fire, it is found that the prediction of thermal radiation intensity with the substrate slope 0°is more accurate. The safe distance of spill fire at different leaking moments can be predicted on the basis of the calculation results of the solid flame radiation model and the injury criteria to human bodies caused by the thermal radiation.
作者 刘全义 吕志豪 智茂永 李志法 孙中正 LIU Quanyi;L Zhihao;ZHI Maoyong;LI Zhifa;SUN Zhongzheng(College of Civil Aviation Safety Engineering,Civil Aviation Flight University of China,Guanghan 618307,China)
出处 《中国石油大学学报:自然科学版》 EI CAS CSCD 北大核心 2020年第1期149-155,共7页 Journal of China University of Petroleum (Edition of Natural Science)
基金 国家重点研发计划项目(2018YFC0809500) 国家自然科学基金项目(U1633203,U1733126) 四川省科技计划项目(2018GZYZF0069) 中国民用航空飞行学院基金项目(J2018-36,X2018-22) 灭火救援技术公安部重点实验室开放课题(KF201807)。
关键词 民航安全 航空煤油流淌火 油槽坡度 固体火焰模型 热辐射模型 civil aviation safety jet fuel spill fire substrate slope solid flame model thermal radiation model
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