一个端部开口短管气体爆燃外场火焰传播模型  

A model of gaseous deflagration flame propagation outside the open end of a short duct

作　　者：杜扬 齐圣 李国庆 王世茂 李阳超 DU Yang;QI Sheng;LI Guoqing;WANG Shimao;LI Yangchao(Department of Oil,Army Logistics University of PLA, Chongqing 401331,China;Chongqing Key Laboratory of Fire and Explosion Safety, Army Logistics University of PLA,Chongqing 401331,China)

机构地区：[1]中国人民解放军陆军勤务学院油料系,重庆401331 [2]中国人民解放军陆军勤务学院火灾爆炸与安全防护重庆市重点实验室,重庆401331

出　　处：《爆炸与冲击》2018年第5期1057-1063,共7页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51276195);重庆市研究生创新项目(CYB15127)

摘　　要：针对端部开口短管气体爆燃火焰传播问题,通过借鉴Clanet等和Bychkov等提出的火焰传播模型,在假设绝热、不可压缩的条件下,得到了可燃气体分布与火焰锋面传播的数学模型。以汽油蒸气为实验工质,在全透明实验管道上进行了爆燃实验。通过高速摄影及纹影图像,对所提出的模型进行了验证。结果表明,该模型能够较准确地预测长径比4∶1至10∶1的端部开口短管气体爆燃外场可燃气体界面与火焰锋面位置。上述成果在可燃气防爆安全领域具有一定应用价值。Aiming at the flame propagation problem of gas deflagration in a short tube with one end closed and the other end open,by referring to the flame propagation model proposed by Clanet,et al and Bychkov,et al,and under the condition of adiabatic and incompressible assumption,a mathematical model of flammable gas distribution and flame front propagation was obtained.By using gasoline vapor as experimental working substance,deflagration experiment was carried out based on a fully transparent experimental pipeline.The proposed model was validated by high-speed photography and schlieren images.Results show that under the condition of length-diameter ratios 4∶1 to 10∶1,this model can predict accurately the flammable gas interface position and flame front position in the flow field outside the open end.Above results extend the original theory to outside field calculation,and have certain application value in flammable gas explosion protection and safety design.

关 键 词：汽油蒸气 爆燃 火焰锋面 开口管道 

分 类 号：O381[理学—流体力学]