汽轮机高压进汽室气动分析及结构改进  

Aerodynamic Analysis and Structure Improvement of HP Steam Turbine Inlet

作　　者：平艳 钟主海[1] 江生科[1] PING Yan;ZHONG Zhuhai;JIANG Shengke(Dongfang Turbine Co.,Ltd.,Deyang Sichuan,618000)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2022年第4期10-15,共6页Dongfang Turbine

摘　　要：高压进汽室的气动性能直接影响汽轮机的整体效率,文章对不同耦合汽轮机高压首级叶片的进汽腔室结构进行数值对比分析,介绍了进汽腔室结构改变所带来的对进汽室气动性能的变化。本文的研究对象为某型号超临界高压进汽室,气流从进汽管进入进汽腔室并且最后进入主流叶片流道。采用商业CFD软件进行数值模拟,分析进汽室内部流场的流动损失特性并结合相应截面的流线图,对比不同进汽腔室结构对流动损失的影响。计算结果表明:在高压进汽腔室中分面处增加倒角、在中分面处增加薄板结构等措施将明显提高整个高压进汽腔室的气动性能,并有效提高进入叶片排的气流均匀性,进而改善耦合首级的气动性能。The aerodynamic performances of HP Steam Turbine Inlet directly affect the overall efficiency of steam turbine.in this paper,numerical analysis for single cylinder and whole circle of stator and single channel of rotor of HP first stage coupling with air chamber has been done,the change of aerodynamic performances of HP steam turbine inlet because of different structures of air chamber has been introduced.CFD simulation results show that:doing corner rounding or adding the structure of thin plate have a significant impact on flow field in HP Steam Turbine Inlet,and the two structures of air chamber obviously improved aerodynamic performance of HP Steam Turbine Inlet.And,the aerodynamic performance of HP first stage will be polished up because of the homogeneity of airflow entering the stators.

关 键 词：高压进汽腔室 叶片耦合 气动性能 薄板 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]