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为了获得气氧/甲烷与气氢/气氧两种推进剂组合燃烧特性的异同,将氢/氧气-气喷注器的设计经验用于气氧/甲烷气-气喷注器设计,在同一燃烧室中针对气氧/甲烷与气氢/气氧同轴剪切喷注器燃烧特性开展了数值仿真与试验研究。结果表明:在喷注器设计参数相似的情况下,气氧/甲烷喷注器尺寸与气氢/气氧喷注器尺寸相当;在相同的燃烧室设计压力、结构尺寸,以及两种推进剂组合均完全燃烧的情况下,要产生相同的推力,气氧/甲烷(混合比3.5)推进剂流量约为氢/氧(混合比6.0)推进剂流量的1.27倍,气氧/甲烷燃烧所需燃烧室特征长度约为氢/氧燃烧室特征长度的1.48倍,气氧/甲烷燃烧室壁面热载约为氢/氧燃烧室壁面热载的一半。
In order to obtain the similarities and differences between the combustion characteristics of a gas / oxygen / methane / gas / hydrogen / oxygen combination, the hydrogen / oxygen-gas injector design experience was used in the design of the gas / oxygen / In the combustion chamber, the numerical simulation and experimental research on the combustion characteristics of the gas-oxygen / methane and gas-hydrogen / oxygen-oxygen coaxial shear injector was carried out. The results show that the size of the gas / oxygen injector is comparable to that of the gas / oxygen injector when the design parameters of the injector are similar. In the same design pressure of the combustion chamber, the size of the structure, When the combination is completely burned, the same thrust is produced. The gas / oxygen (mixture ratio 3.5) propellant flow is approximately 1.27 times the hydrogen / oxygen (mixture ratio 6.0) propellant flow rate, and the gas / The characteristic length of the combustion chamber is about 1.48 times the characteristic length of the hydrogen / oxygen combustion chamber, and the wall surface heat load of the gas oxygen / methane combustion chamber is about half that of the hydrogen / oxygen combustion chamber wall surface.