论文部分内容阅读
应用含组分守恒方程的质量平均Navier-Stokes方程和B-L代数湍流模型,数值模拟了带支板引射器的模型燃烧室内部的流场结构,对比研究了燃料注入角度对燃烧及发动机性能的影响。在计算过程中,对方程中的对流项采用了空间为二阶精度的AUSMPW格式,对扩散项采用了二阶中心差分离散。研究结果表明,燃料有角度注入改善了燃料的混合性能,强化了燃料的燃烧效率,提高了发动机燃烧室的动量增量。此外,燃烧室的性能研究需考虑燃烧效率、总压损失及动量增量等因素。
The mass-averaged Navier-Stokes equations and the BL algebraic turbulence model with component conservation equations were used to numerically simulate the flow field structure inside the model combustor with support plate ejector. The effects of fuel injection angle on combustion and engine performance influences. In the calculation process, the convection term in the equation adopts the AUSMPW format with the second-order spatial precision and the second-order central differential dispersion for the diffusion term. The results show that the fuel injected at an angle improves the fuel mixing performance, enhances the combustion efficiency of the fuel, and increases the momentum increment of the engine combustion chamber. In addition, the combustion chamber performance studies need to consider the combustion efficiency, total pressure loss and momentum increment and other factors.