为了评估燃烧加热器污染组分对超燃冲压发动机燃烧室燃烧性能的影响,采用CFD软件分别对纯净空气和污染空气来流条件下的燃烧室流场进行了数值模拟。对数值模拟方法进行了实验验证,数值模拟值与实验值吻合较好。数值模拟结果表明:实验气体中含H2O和CO2时,燃烧室壁面压力和燃烧效率降低;煤油燃烧加热器产生的污染组分对燃烧性能的影响小于氢氧燃烧加热器,采用煤油燃烧加热器的结果更接近纯净空气。

In order to evaluate the vitiation effect of combustion heaters on the performance of supersonic combustion, numerical simulations of the flow field of the scramjet combustor were carried out. The method has been certified by the experimental results and the simulation values are in good agreement with the experimental values. The results indicate that when H2O and CO2 are present in vitiated air, the wall pressure and the combustion efficiency decrease in the combustor. The vitiation effect on the per formance of supersonic combustion in the case of the kerosene heater is lower than that in the case of hydrogen oxygen combustion heater, and the results of the kerosene heater are closer to the pure air than that of the hydrogen-oxygen combustion heater.