新型纽扣式涡喷发动机燃烧室数值模拟

为了给超微型燃烧室提供数据参考，对设计的某微型燃烧室的稳态燃烧过程进行数值模拟。采用三维建模，入口参数采用等熵数值计算，考虑了湍流化学反应、热辐射等情况，不仅得到燃烧室稳态工作时的速度场、温度场及各组分浓度分布，而且分析了燃料/空气的流动与回流、燃烧效率以及总压恢复系数的情况，并与实验数据进行对比。计算结果可以较为准确地反映燃烧室的实际燃烧情况。结果表明，燃烧室出口速度约为65m/s，出口温度约1000K，仿真与实验数据契合度高，燃烧室结构设计合理。 

Simulation Calculation of Combustion Chamber for Button Turbojet Engine

To provide reference data for ultra-micro combustor, a new type button turbojet engine was designed and simulated in the combustion''s steady-state process. The boundary condition of inlet was calculated with isentropic numerical calculation taking into account turbulent chemical reaction, heat radiation, and so on, to get the combustion chamber''s steady-state of the velocity, temperature and component concentration distribution, to analyze the fuel/air flow and backflow, combustion efficiency and total pressure recovery coefficient, and to compare with the experimental data. The calculation results can accurately reflect the actual combustion. The results show that, when combustion chamber exit velocity is about 65m/s, outlet temperature is around 1000K, the simulation and experimental data are more similar, combustion chamber structure design is reasonable.