横风作用下燃气罐车泄漏射流火行为特征研究  

Fire Behavior Characteristics of Leakage Jet Fire of Tank Under Crosswinds

作　　者：彭新宇 唐飞[2] Peng Xinyu;Tang Fei(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《燃烧科学与技术》2023年第3期365-371,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52076066);安徽省杰出青年基金资助项目(2208085J34);中国科学院率先行动人才计划;中国科学技术大学学术领军人才培养计划

摘　　要：为探究燃气罐车泄漏射流火的火灾特性,本文通过缩尺寸实验台开展实验,研究了横风风速、泄漏流量以及泄漏孔径对射流火行为及罐体表面温度变化特征的影响.研究表明:横风风速越大,火焰高度越低,最大降幅超过0.4 m.此外,横风会加剧罐体表面受到的火焰热反馈效果,进而引发罐体表面最大温度的进一步升高;最后,从火羽流热浮力以及环境风诱导惯性力的耦合角度出发,分析了横风对射流火火焰几何特征的影响机制;并根据火焰及烟气对罐体表面的辐射、对流传热作用,建立了横风作用下气罐车泄漏射流火的最大温度模型.In order to explore the characteristics of the leakage fire in the gas tank truck,this paper carried out experiments on the reduced size test platform,and studied the influence of cross-wind speed,leakage flow rate and leakage diameter on the jet fire behavior and the characteristics of tank surface temperature change.It is found that the flame height of gas tank leakage will decrease with the increasing velocity of crosswind.The spacing be-tween maximum and minimum of flame height is more than 0.4 m in experiments.Besides,crosswind will en-hance the effect from the thermal feedback of jet flame on the tank surface,which will further lead to the increas-ing measured maximum temperature on tank surface.Based on the coupling effect between the thermal buoyancy of jet plume and the inertial force induced by crosswind,the influence mechanism of crosswind on the geometrical characteristics of gas leakage jet flame was analyzed.In terms of maximum temperature on tank surface,considering the radiation and convection effect from fire and hot flue gas,a new model for maximum tank surface temperature was established.

关 键 词：燃气泄漏 射流火 火焰高度 最大温度 横风 

分 类 号：TK16[动力工程及工程热物理—热能工程]