论文部分内容阅读
基于CFD(computational fluid dynamics)技术,分别采用有限速率/涡耗散(finite-rate/eddy-dis-sipation)、涡耗散(eddy-dissipation)和涡耗散概念(EDC)燃烧模型,对一种曲面齿冠状混合器作用下的加力燃烧室进行数值计算.计算结果表明:曲面齿冠状混合器下游产生明显的流向涡对,流向涡的存在可以增强内外涵冷热气流掺混;与直面齿冠状混合器相比,曲面齿冠状混合器下游流向涡强度大于直面齿冠状混合器,其混合效率高于直面齿冠状混合器;加力燃烧室内氧气和二氧化碳质量分数分布结构表明了涡耗散模型的计算更为合理;计算结果可为加力燃烧室混合器选型和燃烧数值模拟提供依据.
Based on CFD (computational fluid dynamics), finite-rate / eddy-dis-sipation, eddy-dissipation and eddy dissipation concept (EDC) The results show that there are obvious vortex vortex pairs downstream of the crown-tooth mixer, and the existence of flow vortices can enhance the mixing of cold and hot air flow between inner and outer culverts. Compared with the crowned combustor, the eddy current downstream of the curved crowned combustor is greater than that of the straight crowned combustor, and its mixing efficiency is higher than that of the straight crowned combustor. The oxygen and carbon dioxide mass fraction distribution in the afterburner shows that the eddy dissipation The calculation of the model is more reasonable; the calculation result can provide the basis for the selection and combustion numerical simulation of the afterburner mixer.