乙烯超燃燃烧室菱形孔射流的数值优化

发布时间：2018-01-22 20:42

  本文关键词： 超燃燃烧室 菱形孔 掺混增强 数值模拟　出处：《弹箭与制导学报》2016年03期 　论文类型：期刊论文

【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。
[Abstract]:In order to analyze the effect of different aspect ratio and deflection angle of diamond hole on the flow characteristics of the combustion chamber under the same area. Numerical simulation of supersonic flow field of low hydrodynamic injection is carried out. The results show that, of the six configurations calculated, the aspect to width ratio of 5 configuration is the best, and the penetration ability and mixing characteristics of the fuel are the strongest. However, the total pressure loss on the symmetric surface becomes larger. Among the three deflection angle configurations calculated, the fuel mixing characteristics and the fuel penetration ability of the 30 掳configuration are the strongest, but the uplift capacity of the fuel is weak at the far flow field, and the height of the plume mass center decreases.
【作者单位】： 空军工程大学防空反导学院;
【基金】：航空科学基金(20130196004)资助
【分类号】：V235.21
【正文快照】： 0引言超燃冲压发动机作为高超声速发动机最为理想的动力装置之一,其技术是目前各国研究的关键技术[1_2]。由于超声速入口气流速度较快,掺混气体在燃烧室停留时间非常短,超燃燃烧室内的燃料掺混成为燃烧室研究的难点[3。壁面射流由于结构简单、总压损失小被很多研究者青睐。，

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