大功率百万汽轮机侧齿汽封气动性能数值研究  

Numerical Study on Aerodynamic Performance of Side Gear Seal of High Power Turbine

作　　者：刘秋霞 平艳 白昆仑 王姗 江生科[1] LIU Qiuxia;PING Yan;BAI Kunlun;WANG Shan;JIANG Shengke(Dongfang Turbine Co.,Ltd.,618000,DeYang,SiChuan,China)

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：《东方电气评论》2024年第1期49-53,共5页Dongfang Electric Review

摘　　要：以典型大功率百万汽轮机组的叶顶汽封为对象,利用数值方法研究侧齿结构位置、数量和尺寸在额定工况下对密封效果的影响,并与传统城墙齿汽封对比,达到漏汽最小的最佳适用效果。结果表明:城墙齿汽封的侧齿结构通过划分腔室使主流产生大漩涡,进而抬升主流,阻碍蒸汽向前流动;对于大功率百万汽轮机,与城墙齿汽封相比,侧齿的数量、位置和尺寸均存在较佳值,使防泄漏效果最优,泄漏量相对减少7.5%。Based on the tip seal of typical high power turbine,the influence of the structure of side seal,position,quantity and size on the sealing effect and get the best applicable effect under rated working conditions are studied by CFX numerical.The results show that the side seal structure added to the wall seal is to raise the main stream by making the main stream produce a large vortex structure through its divided chamber,which hinders forward flow of some fluids;For the high power turbine,compared with the wall seal,there are optimal values for the position,quantity,and size of the side seal,the anti leakage effect is better,and the leakage is relatively reduced by 7.5%.

关 键 词：汽轮机 数值模拟 侧齿汽封 泄漏量 

分 类 号：TM621[电气工程—电力系统及自动化]