Influence of Axial Flow Field Parameter Fluctuations on Performance of Scramjet Combustor
When air-breathing aircraft is flying over a wide area,the upflow of the combustor central axis will change greatly,and the flow field parameters will fluctuate along the axis. Therefore,it is necessary to carry out a study on the influence of axis flow field parameter fluctuation on combustion chamber performance,so as to provide relevant theoretical support for the com-bustion chamber of air-breathing aircraft in wide-area flight design. Based on the N-S gas-phase control model,combined with combustion model,turbulence model,burning rate model and mass transfer model,a numerical simulation model of flow com-bustion in solid fuel scramjet combustor is established. Through this model,the influence of the upflow field parameter fluctua-tion of the central axis on the combustor performance is carried out. The results show that for a optimized combustor configura-tion,different inlet air flow rates will cause the Mach number of the combustor to oscillate along the flow direction. The greater the oscillation amplitude,the greater the total pressure loss. Too high or too low inlet air flow rate will both result in Mach num-ber oscillation in the combustor. However,selecting a suitable inlet air flow rate can significantly reduce the Mach number os-cillation of combustor flow. Therefore,for different combustor configurations,appropriate inlet air flow should be designed to reduce the Mach number oscillation of the flow field in the combustor,reducing the flow loss and improving the working per-formance of the combustor.
solid fuelscramjetnumerical simulationflow and combustioncombustor
万方数据
维普
