焦炭粉-氧气混合物爆燃向爆震转捩的数值模拟  

Numerical Simulation of Deflagration to Detonation Transition in Coke Powder-Oxygen Mixture

作　　者：高泰荫[1] 高越 栗自彬 李元明 张明新 张殿杰 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110006 [2]戴卡轮毂制造有限公司,河北秦皇岛066003

出　　处：《东北大学学报（自然科学版）》2000年第3期290-293,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目! (59776 0 2 4 )

摘　　要：根据化学反应和两相反应流体动力学理论 ,建立了焦炭粉 氧气混合物燃烧波在一维封闭空间内的爆燃爆震转捩现象的数学模型 ,运用坐标变换和MacCormack两步显式差分格式 ,成功地完成了过程的数值模拟·清楚地诠释了气固两相混合物中DDT现象的转变机制 :激波诱导、激波生成、激波加强及至稳态爆震·转变过程受初始温度场、压力场。The mathematical model of deflagration to detonation transition (DDT) for coke powder and oxygen mixture in one dimensional closed system was established on the basis of chemical reaction and two phase reaction fluid mechanics theory. Numerical simulation of the process was successfully made through coordinate transformation and two step display differential schemes. DDT mechanism in dust two phase mixture was clearly interpreted:induction period of shock wave,production period of shock wave,intension period of shock wave and steady detonation were verified. It′s revealed that the transition process is affected by initial states of temperature,pressure,dust concentration and particle size.

关 键 词：两相可燃混合物 爆燃爆震转捩 数值模拟 

分 类 号：O381[理学—流体力学]