透平中混合加载叶片成型设计研究  

Research on Profile Design of Front-and Rear-loaded Turbine Blades

作　　者：孙奇[1] 邓国梁[1] 钟主海[1] Sun Qi;Deng Guoliang;Zhong Zhuhai(Dongfang Turbine Co., Ltd., Deyang 618000, Sichuan Province, China)

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《发电设备》2020年第3期166-169,共4页Power Equipment

摘　　要：在叶片弯扭联合设计方法的基础上,提出了混合加载叶片成型,即在叶片二次流损失严重的端部区域使用后加载叶片成型,在二次流影响较弱的中部区域使用前加载叶片成型。结果表明:混合加载叶片子午面的压力呈C形分布,可控制径向二次流损失;合理匹配叶片安装角可进一步降低静、动叶片中的二次流损失。The profile of front-and rear-loaded turbine blade was proposed based on the design of twisted and bowed blade.That is to apply rear-loaded profile for the root and tip region,where the secondary flow loss is high,and to apply front-loaded profile for the area at middle height,where the secondary flow loss is low.Results show that the pressure distribution on the meridian surface of a front-and rear-loaded turbine blade presents the C pattern,which is capable of controlling the secondary flow loss in radial direction.The secondary flow loss in stator and rotor blade could be further reduced by setting a reasonable installation angle for the blade.

关 键 词：透平 混合加载叶片 叶片成型 二次流损失 型面损失 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]