叶片出口安放角对油涡轮性能的影响  

Relationship Between Outlet Angle of Blade and Performance of Oil Turbine

作　　者：苟秋琴[1] 赖喜德[1] 宋冬梅[1] 

机构地区：[1]西华大学,四川成都610039

出　　处：《流体机械》2013年第11期20-25,共6页Fluid Machinery

基　　金：四川省教育厅成果转化培育项目(11ZZ002);"流体及动力机械"省部共建教育部重点实验室项目(SBZDPY-11-7);西华大学研究生创新基金(Ycjj201125)

摘　　要：根据油涡轮各部件的基本结构与工作原理,推导出油涡轮中能量转换与几何参数之间的关系方程,分析了油涡轮有效轴功率随叶片出口安放角β2的变化规律。本文结合1000MW汽轮机组配套油涡轮研发,借助CFD软件对叶片出口安放角β2分别为22.5°,18°,13.5°和10°4种设计方案的油涡轮进行多工况数值模拟。理论分析和多工况数值模拟都表明:在一定范围内随着叶片出口安放角减小,油涡轮的有效轴功率会随之增大,且"n-N T"曲线更平坦,不仅能够满足油涡轮的调节特性要求,而且还具有较好的稳定性。由此证明文中分析方法可以为完善油涡轮的设计理论奠定一些基础。According to basic structure and operating principle of oil turbine components,the relation equation between energy conversion and geometric parameters of oil turbine were established. And the variation law of effective shaft power of oil turbine with outlet angle of blade was presented. Combining with the research of oil turbine of 1000 MW steam turbine unit,the multi-operation conditions numerical simulation was performed by CFD software when the outlet angle of blade is 22. 5°,18°,13. 5° and10° respectively. The result of theoretical analysis and numerical simulation indicates that as the outlet angle of blade decrease in a certain range,the oil turbine effective shaft power will increase,and the＂n-N T＂curve is more flat. It can not only meet the design requirements but also have better stability. It is shown that the analysis methods with presented equations can laid some foundation for improving the design of the oil turbine.

关 键 词：汽轮机机组 油涡轮 叶片出口安放角 性能参数 

分 类 号：TH137.51[机械工程—机械制造及自动化] TP271[自动化与计算机技术—检测技术与自动化装置]