Two Dimensional Numerical Simulation of the Influence of Flow Index on Two-phase Detonation of Gel Fuel/Air

摘要：

　　The process of two-phase detonation was studied on gel fuel and air mixture,and the impact of flow index(n)was obtained on detonation.Two-phase detonation governing equations were established according to the nature of gel fuels and the characteristics of two-phase detonation flow field.The governing equations were solved by the method of conservation element and solution element(the CE/SE method).In this paper,the detonation of gasoline-based gel fuel in 2.0 meters detonation tube was simulated.The results indicate that the deflagration to detonation transition(DDT)distance is impacted by flow index(n)significantly.The DDT distance is 339mm,485mm and 647mm for the flow index n=0.1,0.25 and 0.4,respectively.As the flow index(n)increases,the distance of deflagration to detonation transition becomes longer.Along with detonation wave sweeping through the droplets of gel fuel,the droplets experience three stages: the shock-induced stage,the reaction accelerating stage and the complete reaction stage.Each stage is affected by flow index(n),especially for the reaction accelerating stage.With the flow index(n)increasing,the time required for complete evaporation and peeling of fuel droplets increases.The calculation results for further investigating the effect of the flow index(n)on the detonation,exploring the way to shorten the DDT distance and increasing the pulse detonation engine thrust are of important significance.

关键词： Flow Index Deflagration to Detonation Evaporation Peeling Conservation Element and Solution Element Method

作者: Jianlu YANG Chunsheng WENG

作者单位: National Key Laboratory of Transient Physics,Nanjing University of Science & Technology,Nanjing 210094,P.R.China

会议类型: 国际会议

会议名称: The 5th International Conference on Mechanical Engineering and Mechanics(第五届国际机械工程与力学会议)

会议地点: 江苏扬州

会议语种:英文

页码: 69-74

在线出版日期: 2014-08-21（万方平台首次上网日期，不代表论文的发表时间）