百万千瓦级汽轮机低压排汽缸气动特性的仿真分析  

Simulation Analysis of Aerodynamic Characteristics in a Million Kilowatt Level of Steam Turbine Low Pressure Exhaust Hood

作　　者：孙建国[1] 朱东保[2] 冯喆[3] 杨春宇[1] 万杰 

机构地区：[1]华能北方联合电力达拉特发电厂,内蒙古达拉特014300 [2]武汉第二船舶设计研究所,武汉430205 [3]中国船舶重工集团公司第七○三研究所,哈尔滨150030 [4]南京遒涯信息技术有限公司,南京211505

出　　处：《机械工程师》2016年第4期193-196,共4页Mechanical Engineer

基　　金：南京2014年“321引进计划”人选项目

摘　　要：以百万千瓦等级汽轮机的低压排汽缸为研究对象,运用CFX仿真分析软件,采用排汽缸单独计算与结合末级动叶联合计算两种方法,以及不同进出口边界条件组合形式,对比研究不同计算条件下的排汽缸气动特性。通过多种计算方案的对比分析,采用结合末级动叶进行联合计算的方法更符合低压排汽缸的实际气动特征,为后续的低压排汽缸优化改进工作提供有效的仿真分析基础。This paper studies the aerodynamic characteristics of a million kilowatt level of the steam turbine low pressure exhaust hood under the different boundary conditions using CFX simulation analysis software. There are two calculation methods that include exhaust hood calculated separately and the joint calculation combined with the final stage rotor.Through comparison and analysis of a variety of scheme calculation, the joint calculation method based on last stage rotor is more accord with the actual aerodynamic characteristics. The results can provide effective basis of simulation analysis for subsequent low-pressure exhaust hood optimization improvement.

关 键 词：排汽缸 仿真分析 总压损失 气动特性 

分 类 号：TK263.1[动力工程及工程热物理—动力机械及工程]