含铝汽油/空气多相爆轰机理仿真计算  

Numerical simulation for mechanism of multi-phase detonation of aluminized gasoline and air

作　　者：胡洪波[1] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《南京理工大学学报》2014年第4期445-450,共6页Journal of Nanjing University of Science and Technology

基　　金：高等学校博士学科点专项科研基金(20093219110037);江苏省普通高校研究生科研创新计划(CXLX11_0249)

摘　　要：为了探究含铝汽油/空气多相爆轰的作用机理,建立了气、液、固多相流动与燃烧的数学物理模型,并采用守恒元与求解元计算方法对其进行了数值模拟。基于数值计算结果,分析了含铝汽油燃料的燃烧转爆轰过程,比较了不同液滴初始半径和铝质量分数下含铝汽油的爆轰参数。计算结果表明,含铝汽油液滴初始半径越小,形成稳定爆轰所需距离越短,爆轰过程中累积的铝粉体积分数越大;当液滴初始半径大于约100μm时,不能形成自持传播的爆轰波;随着铝质量分数增加,形成稳定爆轰所需距离更长,爆轰压力、温度和速度均增大,但增幅减小。研究结果对含铝液体燃料推进剂特性研究和应用具有重要意义。In order to understand the mechanism of multi-phase detonation of aluminized gasoline and air,a mathematical physics model of flow and combustion with gas,liquid and solid is established, and solved numerically by conservation element and solution element（ CE/SE） method. According to the calculated results, the deflagration to detonation progress of aluminized gasoline and air is analyzed, and the influences of initial liquid radius and aluminum concentration on detonation parameters are compared. The results show that the initial liquid radius is smaller, the distance of stable detonation formation is shorter,and the aluminum volume fraction accumulated is greater. The detonation wave can’t propagate self-sustaining if the initial liquid is greater than about 100 μm. The distance of stable detonation formation and volume fraction accumulated during detonation process＆amp;nbsp;increase with the increase of the aluminum concentration. The detonation pressure,temperature and velocity increase with the increase of the aluminum concentration, but the amplifications are decreased. The research results have some significant references for the characteristic study and application exploration of liquid fuels containing aluminum.

关 键 词：爆轰 多相流 铝粉 含铝汽油空气 燃烧 守恒元与求解元 数值计算 

分 类 号：O389[理学—流体力学]