提出了后燃烧室及在后燃烧室引入旁路气流的概念，目的是提高含硼固体燃料冲压发动机的燃烧效率。分析了理论模型，并进行了数字计算，对压力、流量、混合比、进气温度、后燃烧室长度等的影响进行了研究，认为上述方法可以得到较好的燃烧效率。 The concept of the afterburner and the bypass gas flow introduced into the afterburner is proposed to improve the combustion efficiency of the boron-containing solid fuel ramjet. The theoretical model was analyzed, and the numerical calculation was carried out. The effects of pressure, flow rate, mixing ratio, inlet air temperature and afterburner length were studied. It is concluded that the above method can achieve better combustion efficiency.