摘要
以超音速燃烧冲压发动机设计为背景,采用有限体积法,以乙烯为燃料对交错尾部支板和开式凹腔的组合方式及位置进行数值研究。通过组合方式的研究发现,横向组合的凹腔内回流区卷吸作用强于纵向组合;凹腔远离交错尾部支板能促进燃烧火焰扩散,燃烧效率更高,总压损失更小。通过对组合位置的研究,总结出组合位置对燃烧室性能的影响规律,发现凹腔与支板横向组合,凹腔距支板尾缘距离为0.15 m时,总压恢复系数达到最大,燃烧效率也较高。该项研究可为超燃燃烧室设计提供参考。
The numerical study on patterns and positions of combinations of staggered rear strut and open cavity was carried out based on the design of scramjet engine with ethene as fuel and the method of finite volume.The findings of the study on the combination patterns are as follows： in horizontal combinations,entrainment in the concave cavity recirculation zone is more powerful than that in vertical combinations.The spread of burning flames can be enhanced in the case that cavity is far away from staggered rear strut,so the burning efficiency is improved and the loss of the total pressure is lower.Through the study on the combination positions,the regulations of the influence of combination positions on the combustion chamber＇s performance were summarized,and in horizontal combination,when the distance between cavity and strut is 0.15 m,total pressure recovery coefficient is the largest and combustion efficiency is high.The study can be available for reference in design of supersonic combustion chamber.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2012年第5期602-607,共6页
Journal of Solid Rocket Technology
基金
高超声速冲压发动机技术重点实验室开放基金资助项目
中央高校基本科研业务费重大项目培育计划(HEUCFZ1205)
关键词
超音速燃烧
支板
凹腔
结构组合
数值模拟
supersonic combustion
strut
cavity
structure combination
numerical simulation
