叶顶汽封漏汽对汽轮机排汽缸气动性能的影响  

Influence of Blade Tip Steam Seal Leak on Turbine Exhaust Hood Aerodynamic Performance

作　　者：杨明[1] 刘云锋[1] 周佳慧[1] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《汽轮机技术》2015年第1期6-8,共3页Turbine Technology

摘　　要：利用CFD方法对某汽轮机的末级叶片、叶顶汽封和排汽缸进行了整圈耦合计算,考虑了筋板和撑管对流场的影响,较真实地对低压排汽缸进行了数值模拟,结果表明末级动叶片叶顶汽封漏汽对排汽缸气动性能有较大影响,为以后的排汽缸气动设计及优化工作提供了新思路。By using CFD methods ,the steam turbine last stage blades ,blade tip seal and the turbine exhaust hood were full circle coupling calculation ,considering the effect of the ribs and the support pipe .The more true for low pressure exhaust hood was numerical simulated .The results showed that last stage blade tip steam seal leak has great influence on the aerodynamic performance of the exhaust hood and provides a new idea for the future exhaust hood aerodynamic design and optimization.

关 键 词：汽轮机排汽缸 气动性能 数值模拟 叶顶汽封 

分 类 号：TK263.2[动力工程及工程热物理—动力机械及工程]