湍流燃烧模型在燃气轮机燃烧室模拟中的运用与对比

利用Fluent商业软件,对燃气轮机燃烧室C16H29非预混燃烧流场进行数值模拟。针对燃烧室的额定工况,分别采用简单概率密度函数模型、涡耗散模型、涡耗散概念模型的2步反应和5步反应过程,对湍流燃烧流场进行对比数值分析,同时,考察燃烧室Thermal和Prompt NOx排放性能。通过比较发现,有吸热反应过程的EDC-5步模型所得流域内燃烧区温度较低;出口温度均匀性最好,最大不均匀度28%;NOx排放量最少。结果表明,该模型能够更合理地预测燃烧室的流场分布。

Application and Contrast of Turbulent-flow Combustion Models for Simulating a Gas Turbine Combustor

By using commercial software Fluent,numerically simulated was the C16H29 non-premixed combustion flow field of a gas turbine combustor. At the rated operating condition of the combustor,a contrast numerical analysis was conducted of the above flow field by adopting the two-step reaction process and five-step one of a simple probability density function (PDF) model,eddy dissipation (ED) model and eddy dissipation concept (EDC) model respectively. In the meantime,the Thermal and Prompt NOx emission performanc...