汽轮机变工况下级内叶栅损失数值计算与分析  

Analysis and Numerical Calculation of Cascade Loss in Turbine under Off Design Conditions

作　　者：王雷 曲优 WANG Lei;QU You(Shenyang Institute of Engineering,Shenyang 110136,China)

机构地区：[1]沈阳工程学院能源与动力学院,沈阳110136

出　　处：《汽轮机技术》2022年第4期259-261,278,共4页Turbine Technology

摘　　要：针对某300MW机组汽轮机中压缸,用有限元数值模拟方法研究了变工况下级内叶栅损失变化规律,分析了进汽参数变化对级内流场的影响,得到了不同工况下级压力分布图、叶栅流场流线图和平均压力变化曲线,并采用多变过程函数值量化不同负荷下的叶栅损失,得到了不同工况下叶栅损失的变化曲线,同时将结果与级详细热力计算得到的叶栅损失相比较,两者计算结果基本一致,结论可为汽轮机在非设计工况下运行时分析级内叶栅损失变化规律提供参考依据。This paper analyzes the change of pressure in the flow field of the cascade flow field,and USES the variable process function to quantified the loss of the blade grid in different conditions,and the loss of the blade grid loss in different working conditions is obtained,and the results of the corresponding loss are compared with the corresponding loss in the level of the detailed heat calculation,and the results of the two calculation are consistent,and the conclusion is that the turbine is provided the reference basis for the loss of the turbine in the non-design condition.

关 键 词：汽轮机 变工况 叶栅损失 数值模拟 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]