汽轮机静叶尾部喷射除湿方法的数值研究  

Steam turbine stative blade tail spray dehumidification numerical investigation

作　　者：李意民[1] 王保明 周忠宁[1] 张国杰[1] 

机构地区：[1]中国矿业大学电力工程学院,江苏徐州221116 [2]华电郑州机械设计研究院有限公司,郑州450046

出　　处：《华电技术》2017年第11期1-4,32,共5页HUADIAN TECHNOLOGY

摘　　要：基于ICEMCFD软件,针对汽轮机末级流道的湿蒸汽问题,提出了一种可用于设计末级静叶除湿结构的数值方法。对第20级流道中相变过程进行数值模拟,并设计了不同宽度缝隙的尾部喷射除湿结构。流道中的自发凝结过程,能很好地结合经典成核理论和液滴生长模型进行阐述。另外,尾部喷射除湿结构能够有效除湿。在缝宽为0.4 mm时,达到最佳除湿效果。To solve the problem of steam turbine end stage runner wet steam,a numerical method for end stage static blade dehumidification structure design was introduced. The 20 th stage runner phase change process was simulated. Tail spray dehumidification structure with different width gap was designed. The condensation process in runner was explained by nucleation theory and droplet growth model. Otherwise,tail spray dehumidification structure is effective,and performance best when the gap is0. 4 mm wide.

关 键 词：汽轮机 静叶 湿蒸汽 凝结 除湿 液滴 ICEMCFD软件 数值模拟 

分 类 号：TK263.6[动力工程及工程热物理—动力机械及工程]