Abstract: The basic of scramjet propulsion,steady combustion is one of the key technologies in liquid hydrocarbon fueled scramjet.Experimental investigations on the flame stability were conducted using direct-connected test model combustor.Various fuel injection modes and strut-cavity flameholder schemes were investigated in the test.Results showed that the kerosene was ignited successfully and stable combustion was sustained at low flight Mach number(Ma0=4~5) conditions.

Key words: Scramjet;Strut;Cavity;Flame stability

摘要： 液态碳氢燃料点火、稳焰技术是超燃冲压发动机的关键技术之一,是发动机获得推力性能的先决条件。采用直连试验手段,对支板凹槽组合稳焰技术进行了研究,比较了不同燃料喷注方式和不同支板凹槽组合方式对点火、稳定燃烧的影响。结果表明支板喷射与支板凹槽组合稳焰的燃烧组织方式,可以实现在低飞行马赫数范围(Ma0=4～5)液体碳氢燃料的可靠点火与稳定燃烧,并获得较好的燃烧性能。

关键词: 超燃冲压发动机;支板;凹槽;稳定燃烧