双背压汽轮机不等长末级叶片低压缸效率计算方法研究  

Research on Calculation Method for Efficiency of Low Pressure Cylinder with Unequal Length Last Stage Blades in Double Back Pressure Steam Turbines

作　　者：蒋寻寒 邵飞 祝海义[2] 陈开峰 宋勇 吴仲 徐钟宇 赫广迅[2] JIANG Xun-han;SHAO Fei;ZHU Hai-yi;CHEN Kai-feng;SONG Yong;WU Zhong;XU Zhong-yu;HE Guang-xun(Datang East China Electric Power Test&Research Institute,Hefei 230088,China;Harbin Turbine Company Limitdd,Harbin 150046,China)

机构地区：[1]中国大唐集团科学技术研究总院有限公司华东电力试验研究院,合肥230088 [2]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《汽轮机技术》2023年第5期346-348,366,共4页Turbine Technology

摘　　要：在某些背压条件下,双背压汽轮机的2座低压缸采用不同长度的末级叶片,可以获得更好的宽负荷节能效果。但是,在汽轮机热力性能验收试验中,无法使用传统方法计算低压缸效率。基于汽轮机工质质量平衡与能量平衡,提出了新的不等长末级叶片低压缸的效率计算方法,该方法可应用于新设计条件下低压缸效率计算。Under certain back pressure conditions,the two low-pressure cylinders of a dual back pressure steam turbine use different lengths of final stage blades,which can achieve better wide load energy-saving effects.However,in the thermal performance acceptance test of steam turbines,traditional methods cannot be used to calculate the efficiency of low-pressure cylinders.This article proposes a new efficiency calculation method for low-pressure cylinders with unequal length last stage blades based on the mass balance and energy balance of steam turbine working fluids.This method can be applied to the efficiency calculation of low pressure cylinders under new design conditions.

关 键 词：汽轮机 节能 双背压 低压缸 不等长末级叶片 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]