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为提高燃气涡轮发动机性能,设计了涡轮叶间燃烧室模型,利用FLUENT软件的Realizable k-ε湍流模型、概率密度函数(PDF)燃烧模型、离散坐标(DO)辐射模型和离散相模型对燃烧室的流动及燃烧进行数值模拟.结果表明:燃烧室燃烧效率高达98.4%,绝对压力损失低至4.2%,气体温度提高700K左右;出口径向温度随无量纲高度呈线性分布;速度、温度、组分分布受高温燃气与主流的掺混程度控制;径向槽(RVC)对促进掺混及改善出口温度场有着积极的影响,其结构值得深入研究.与文献实验数据对比发现:选择的数学模型合理,计算方法可行,其结果可为涡轮叶间燃烧室设计提供参考.
In order to improve the performance of the gas turbine engine, a turbulent inter-leaf combustion chamber model was designed. The realizable k-ε turbulence model, the probability density function (PDF) combustion model, the DO radiation model and the discrete phase model of FLUENT software were used to simulate the combustion chamber The results show that the combustion efficiency of the combustion chamber is as high as 98.4%, the absolute pressure loss is as low as 4.2% and the gas temperature is increased by about 700K. The exit radial temperature is linear with the dimensionless height. The velocity, temperature, Its distribution is controlled by the blending degree of high-temperature gas and the mainstream. The radial groove (RVC) has a positive impact on the promotion of mixing and the improvement of outlet temperature field, and the structure is worth further study.Compared with the experimental data, it is found that the selected mathematical model Reasonable, the calculation method is feasible, the result can provide reference for the combustion chamber design between turbine blades.