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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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双向扩张型孔射流流量系数试验研究
, PP. 37-41
Keywords: 燃气轮机,气膜冷却,双向扩张孔,流量系数,吹风比,雷诺数,射流角度
Abstract:
为了探索双向扩张气膜孔的流阻特性,提高燃气轮机涡轮的气膜冷却效果，在吹风比分别为0.5，1.0，1.5，2.0和主流雷诺数分别为6500，10000和13500下,通过试验方法对不同射流角度和气膜孔出口宽度下孔的流量系数进行研究。结果表明:吹风比为0.5时，射流角度对气膜n流量系数的影响较小；吹风比为1.0,1.5,2.0时,射流角度从30°增大到60°,流量系数随之增大,最大增幅31％,射流角度从60°增大到90°,流量系数变化较小；气膜孔出口宽度与孔径比从1.5增大到2.5,吹风比为0.5时的流量系数变化较小；吹风比为1.0,1.5,2.0时,流量系数最大增幅为18％,并且增幅随着射流角度增大而减小；吹风比从0.5增大到2.0,流量系数最大增幅为107％；主流雷诺数对流量系数影响较小。
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