摘要
采用加入AGS转捩模型的Spalart-Allmaras湍流模型对低雷诺数条件下某涡轮转子内部流场特性进行了数值模拟。分析了雷诺数下降对涡轮内部流场特性的影响,探讨了雷诺数下降对涡轮气动性能的影响特点。计算结果表明,雷诺数下降使涡轮转子叶片吸力面附面层显著增厚,叶片尾缘气流局部分离,并进而严重影响涡轮的气动性能和稳定性。
The numerical simulation for inner flow field of a turbine rotor at low Reynolds number was made by using the Spalart-Allmaras turbulence model integrated with AGS transition model.The influences of the Reynolds number decrement on the turbine flow field and turbine performance were analyzed.The results show that the thickness of the boundary layer on the blade suction surface is remarkably increased and flow separation appears at blade trail due to the Reynolds number decrement.Thus the performance and stability of the turbine are seriously influenced.
出处
《燃气涡轮试验与研究》
2010年第3期5-9,共5页
Gas Turbine Experiment and Research
关键词
涡轮转子
低雷诺数
湍流模型
性能
turbine rotor
low Reynolds number
turbulence model
performance
