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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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离散隔板式迷宫叶顶冷却效率试验分析
, PP. 38-42
Keywords: 燃气轮机,动叶叶顶,迷宫结构,间隙高度,气膜冷却
Abstract:
为减小涡轮机动叶顶部间隙泄漏造成的气动损失、提高叶顶冷却效率,提出在凹槽叶顶离散排布小隔板迷宫。根据某涡轮机动叶结构,设计了迷宫叶顶气膜冷却效率试验台,通过稳态液晶技术测量了间隙叶高比分别为1.0%,2.0%,3.0%和吹风比分别为1.0,1.5,2.0时隔板迷宫叶顶和凹槽叶顶的气膜冷却效率。结果表明:2种叶顶结构的平均冷却效率均随着叶顶间隙高度的增加而减小;在某间隙高叶比和吹风比范围内,隔板迷宫叶顶冷却效率最多比凹槽叶顶冷却效率高出63%;隔板迷宫显著扩大了叶顶的冷却范围,提高了冷却效率,使冷却效率的分布更加均匀。
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