两种透平叶栅三维流动的计算分析  

THREE DIMENSIONAL TURBULENT FLOW CALCULATIONS FOR TWO TYPES OF TURBINE CASCADE

作　　者：朱斌[1] 徐星仲[2] 蒋洪德[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080 [2]北京航空航天大学404教研室,北京100083

出　　处：《工程热物理学报》1998年第6期687-691,共5页Journal of Engineering Thermophysics

基　　金：国家攀登B计划;国家自然科学基金

摘　　要：本文以数值手段分析研究两种不同叶片造型的三维环形叶棚内的定常粘性流动及损失情况，数值方法采用三维可压缩粘性流动压力校正其法求解N－S方程及k－ε双方程湍流模型．新一代透平叶片型线设计与传统叶片型线的差别在于叶片型线的后部加载特性．本文通过计算分析了这种后加载叶片与传统加教叶片应用于汽轮机时对控制三级叶栅损失与二次流发展的作用．A pressure based numerical method for three-dimensional compressible turbulent flowcalculations was adopted to investigate viscous flows inside two types of turbine cascades.The conventional one is called pre-loaded blade, while our newly designed one is called aft-loaded blade. The present calculations show that secondary flow losses in aft-loaded turbinecascades can be controlled and greatly reduced as compared with those in conventional pre-loaded ones. The calculations also show there is significant artificial viscosity by using coarsegrid of 81 ×31 × 31, therefore finer grid system should be adopted in order to get more accurateresults.

关 键 词：后加载叶片 叶栅损失 数值计算 动力机械 

分 类 号：TK05[动力工程及工程热物理] TK123