乙烯超燃燃烧室菱形孔射流的数值优化  

Numerical Optimization on Supersonic Combustion using Ethylene with Diamond-shaped Orifices

作　　者：张涵[1] 吴达[1] 王应洋 王旭东[1] 

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《弹箭与制导学报》2016年第3期60-64,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：航空科学基金(20130196004)资助

摘　　要：为分析相同面积条件下菱形孔的不同长宽比、不同偏转角度对超燃燃烧室中的流动特性影响,对低动压喷射的超声速流场进行了数值模拟。研究结果表明:在计算的6种长宽比构型中,长宽比为5构型燃料穿透能力和掺混特性最强,但此时对称面上总压损失变大;在计算的3种偏转角构型中,偏转角度为30°构型的燃料掺混特性和燃料的穿透能力最强,但此构型在远流场处抬升能力变弱,羽流质量中心高度出现下降。Based on investigation of influence of diamond-shaped orifices with different length-width ratio and various deflection angle on cold flow characteristics of supersonic combustion, numerical simulation was done for evaluating several patterns for mixing enhancement. It is found that the diamond-shaped orifice whose length-width ratio is 5 behaves the best in mixing efficiency and fuel penetration among these different models, but this kind of diamond-shaped orifice heightens total pressure loss. With increase of deflection angle of injector, penetration height of the fuel and mixing efficiency firstly increase and then decrease. The model with 30 degree deflection angle of injector has the best characteristics, but the distance between the flow field and the injector is longer, the effect on increasing penetration height of the fuel is weaker.

关 键 词：超燃燃烧室 菱形孔 掺混增强 数值模拟 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]