乙烯超燃燃烧室支板/多凹腔一体化组合数值分析  

Numerical Study on Supersonic Combustor Using Ethene with Strut and Multi-cavity Combination

作　　者：王应洋 李旭昌[1] 王宏宇[1] 吴振亚[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》2015年第3期107-112,共6页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：为探索多凹腔与交错尾部支板组合时对燃烧室性能的影响,运用有限体积法对乙烯喷注当量比0.6的燃烧室进行了数值模拟。通过对比不同长深比的凹腔串、并联对混合效率、燃烧效率、总压损失的影响,发现并联凹腔能通过更早的实现燃料与主流充分掺混从而提供更大的燃烧区;长深比为3.5的凹腔串、并联对提高燃烧效率效果不明显,长深比为8的凹腔串、并联能显著提高混合效率和燃烧效率,其中长深比为8的凹腔并联燃烧室性能较好。The numerical study based on the method of finite volume and equivalence ratio 0.6 has been carried out to investigate the influ- ence of patterns of staggered rear strut and multi-cavity. Mixing efficiency, combustion efficiency, and total pressure loss were compared. The analysis shows that the mixing and combustion are improved for cavities mounted in both tandem and parallel. Parallel cavity can enhance the combustion efficiency by a more appropriate fuel distribution. L/D = 3.5 doesn＇ t have good efficiency and can＇ t shorten cham- ber length. L/D = 8 has the higher combustion efficiency. Moreover, parallel cavity with L/D = 8 releases heat fast.

关 键 词：超音速燃烧 支板 多凹腔 结构组合 数值模拟 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]