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对超燃燃烧室的高速流动与燃烧的耦合流场进行了一维和三维数值模拟,揭示了其流场的本质和各个参数的关系。首先阐述了超燃燃烧室一维流动特性,然后分析了一维流动模型,获得了芯流面积的计算公式。将一维流动模型应用到实际超燃燃烧室中,与试验数据对比,误差小于5%,并且选出了最优模型。由于一维模型仅能模拟轴向的一维参数变化规律,不能充分反映超燃燃烧流场的详细参数分布,而且二维计算中燃料的喷注不能得到完全真实的模拟,因此为了能更为详细地获得流场各个参数,进行了三维NS方程数值模拟,在计算中考虑了中间一步反应模型,非绝热再附着段的计算结果误差小于2%,满足精度要求,获得了超燃燃烧室的流场全貌,弥补了一维分析模型的不足。
One-dimensional and three-dimensional numerical simulation of the coupled flow field of high-speed flow and combustion in the super-combustion chamber was carried out. The relationship between the flow field and the parameters was revealed. Firstly, the one-dimensional flow characteristics of the super-combustion combustor are expounded. Then the one-dimensional flow model is analyzed and the calculation formula of the core flow area is obtained. One-dimensional flow model is applied to the actual combustion chamber, compared with the experimental data, the error is less than 5%, and the optimal model is selected. Because one-dimensional model can only simulate the variation of axial one-dimensional parameters, it can not fully reflect the detailed parameter distribution of the super-combustion flow field, and the fuel injection in two-dimensional calculation can not be completely real simulation, so in order to be more The three-dimensional Navier-Stokes equations were numerically simulated and the intermediate one-step reaction model was taken into account. The calculated results of non-adiabatic reattachment were less than 2%, which satisfied the accuracy requirements. The whole flow field, make up for the lack of one-dimensional analysis model.