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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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1000mw机组汽轮机末级叶片除湿缝结构设计与优化
, PP. 43-48
Keywords: 1000mw机组,汽轮机,末级叶片,空心静叶,除湿,缝隙结构,数值模拟
Abstract:
以某1000mw机组汽轮机末级叶片为对象,采用cfx软件对该汽轮机末两级叶栅内凝结流动及水滴沉积过程进行了数值模拟,计算分析了除湿缝的缝隙位置、角度、宽度及数目对除湿效率、二次水滴去除率和级效率的影响。结果表明:为保证末级叶片同时具有较好的除湿性能、级效率和静叶刚度,除湿缝结构应设计在相对叶高60%以上,且在压力面和吸力面相对叶宽80.6%和29.2%处;除湿缝角度选取45°,除湿缝宽度采用1.0mm;若不考虑空心静叶的强度问题,单段除湿缝的综合性能更优;当开缝面积相同时,双缝除湿缝的各项性能均更优;当开缝宽度相同时,单缝除湿缝的综合性能更优。
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