凹腔型亚燃冲压发动机燃烧效率研究

Research on combustion efficiency of cavity-type ramjet

通过开展亚燃冲压发动机直连式试验,研究了不同来流条件、不同余气系数时的燃烧性能.结果表明:燃烧效率受来流温度的影响较小,但随着余气系数增加,燃烧效率降低.总体而言,凹腔型燃烧室具有0.9左右的燃烧效率,初步达到了亚燃冲压发动机的实用化要求.

Direct-connected experiments were conducted to reveal combustion perform- ance of cavity-type ramjet under different incoming flow and excess air coefficients. Results show that the combustion efficiency decreases with excess air coefficient, but depends little on the temperature of the incoming flow. Generally speaking, 90% combustion efficiency of cavity-type combustor is sufficient enough to satisfy the requirement of ramjet.