前加载和后加载叶片气动性能的数值研究  

Numerical Study on Aerodynamic Performance of Fore-and Aft-loaded Turbine Blades

作　　者：李军[1] 孙奇[2] 晏鑫[1] 孔祥林[2] 江生科[2] 王建录[2] 丰镇平[1] 

机构地区：[1]西安交通大学叶轮机械研究所,西安710049 [2]东方汽轮机有限公司产品开发处,德阳618001

出　　处：《动力工程》2007年第6期835-839,共5页Power Engineering

基　　金：国家自然科学基金资助项目(50506023);新世纪优秀人才支持计划资助项目(NCET-07-0669)

摘　　要：采用数值计算的方法对后加载和前加载叶片的气动性能进行了详细的分析,研究了无扭曲的叶片与弯曲叶片的压力系数分布以及负荷分布特性,分析了后加载和前加载叶栅内总压分布规律和总压损失沿叶高的变化情况。数值计算得到的后加载和前加载无扭曲的叶片中部压力系数分布与平面叶栅试验数据吻合良好,后加载弯曲叶片和前加载弯曲叶片的近叶顶、中部和近叶根处的压力系数分布与试验数据基本吻合。The aerodynamic performances of aft-loaded and fore-loaded blades are analyzed in detail by numerical calculation methods. Pressure coefficient and load distribution characteristics of straight and bowed blades have been studied. Rules of total pressure distribution and variation of total pressure loss along blade height in fore-loaded and in aft-loaded cascades, are analyzed. The pressure coefficients distribution at mid-height of untwisted fore-loaded and aft- loaded cascades, obtained by numerical calculation agrees well with experimental data of plane cascades. The pressure coefficients distribution, near blade tip, at mid-height and near blade root of the bowed aft-loaded and fore-loaded blades also basically agree with experimental data of annular turbine cascades.

关 键 词：能源与动力工程 汽轮机 叶栅 后加载叶片 前加载叶片 气动性能 数值模拟 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]