摘要
为了获得煤油/氧气超音速射流场的参数分布,将航空煤油和高压氧气在燃烧室内混合,煤油被氧气雾化后形成混合液雾,将液雾点火并通过拉瓦尔喷管加速后喷出,形成高温的超音速射流。采用数值计算和试验测试相结合的方法对超音速射流的射流场开展研究。经过计算获得射流出口处轴心线上的速度和温度的分布规律;利用FLUENT仿真计算软件并结合边界条件,获得整个射流场的速度和温度的仿真计算结果。试验中,首先采用金属熔点法对射流场的温度分布进行验证实验,然后在射流中加入三氧化二铝粉末,采用Spray watch在线粒子测试仪测量距离出口不同距离处射流的速度和温度场的分布;测试时改变航空煤油和高压氧气的输入混合比,观察在不同的富氧度下射流场中各参数的变化。结果表明,射流出口的温度约为2 800K左右,速度约为2 150 m/s左右;当距离喷管出口的距离增大时,射流的温度和速度的分布呈抛物线形急剧下降;当混合液雾的富氧度增大时,射流流场中同一点的温度和速度值都随之降低。
The aviation kerosene and O2 were ignited in the chamber in order to obtain the distribution characteristics of the high velocity jet,which was accelerated and sprayed from the exit. The distribution characteristics of the temperature and velocity on the axis at the exit were obtained by calculation The distribution of the field was obtained by FLUENT numerical simulations. Measuring the temperature and velocity at different distances with particle tester and metal-melt method,the jet characteristics will change with the change of kerosene O2 ratio The results show that the temperature is about 2 800 K and the velocity is about 2 150 m/s at the exit. The temperature and velocity reduce with the distance increase What’s more,with the increase of oxygen-enriched degree,the temperature and velocity in the jet field reduce obviously.
作者
王德文
喻春明
孟东容
渠聚鑫
WANG Dewen;YU Chunming;MENG Dongrong;QU Juxin(Xijing University,Xi'an 710123,China)
出处
《弹箭与制导学报》
CSCD
北大核心
2018年第5期91-94,101,共5页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
西京学院基金项目(XJ170125)资助
关键词
航空煤油
氧气
射流
仿真计算
富氧度
aviation kerosene
O2
jet
numerical simulation
oxygen-enriched degree
作者简介
第一作者:王德文(1976-),男,辽宁大连人,副教授,博士,研究方向:C/C复合材料烧蚀性能以及高温热防护技术。
