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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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旋转状态下曲率对叶片气膜冷却特性的影响
, PP. 26-31
Keywords: 叶片,曲率,气膜冷却效果,旋转,数值模拟
Abstract:
采用sstk-ω紊流模型模拟旋转状态下4种曲率半径(r/d=30,r/d=75,r/d=120和r/d=∞)叶片的气膜冷却效果。分析讨论吹风比分别为0.5和1.5,旋转数分别为0.03768,0.07536及0.11304时,曲率和旋转数对叶片吸力面和压力面气膜冷却特性的影响。结果表明:旋转数一定时,曲率半径越小叶片的吸力面和压力面气膜轨迹偏转越明显;当曲率半径变大时,吸力面高nu区域面积增大,叶片表面传热效果增强;压力面高nu区域面积减小,叶片压力面气膜冷却效果减弱;旋转数的增大使得小曲率半径叶片吸力面表面传热减弱,大曲率半径叶片的压力面表面传热降低。
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