变几何喉道对超燃冲压发动机点火与燃烧性能的影响  

Variable geometry effects on the scramjet ignition and combustion

作　　者：潘余[1] 李大鹏[1] 刘卫东[1] 梁剑寒[1] 王振国[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《推进技术》2006年第3期225-229,共5页Journal of Propulsion Technology

基　　金：国家"八六三"高技术计划支助项目(2004AA723073)

摘　　要：为了研究变几何喉道对双模态超燃冲压发动机工作的影响,对可变几何喉道的双模态超燃冲压发动机在不同当量比时模态转换前后进行了比较,对几何喉道的大小对点火和燃烧性能的影响进行了试验研究。结果表明,可变几何喉道不但有利于超燃发动机点火和火焰稳定,提高发动机燃烧性能,而且可以快速的实现亚/超模态间的转换,但是几何喉道的大小直接会影响发动机点火和燃烧性能。To study the variable geometry effects on the dual mode scramjet operation, the mode translation with different ER（equivalence ratio） and the influence on the ignition ability and combustion efficiency of variable geometry dual mode scramjet were investigated by experimental method. The results revealed that the variable geometry can improve the ignition ability, flame holding ability and combustion efficiency and make the mode translation procedure quickly. However, it can also influence the ignition and flame holding process.

关 键 词：超音速冲压喷气发动机 模态转换^+ 变几何喉道^+ 点火 燃烧性能 

分 类 号：V235.213[航空宇航科学与技术—航空宇航推进理论与工程]