Internal Cooling Passage Heat Transfer Near the Entrance to a Film Cooling Hole: Experimental and Computational Results
Internal Cooling Passage Heat Transfer Near the Entrance to a Film Cooling Hole: Experimental and Computational Results
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薄膜冷却孔入口附近的内部冷却通道传热：实验和计算结果
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
P. Ireland
中科院分区：
文献类型：
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作者：
A. Byerley;T. V. Jones;P. Ireland
在大型 (100X) 模型中使用瞬态液晶技术在单个薄膜冷却孔的入口附近进行了详细的传热测量。孔倾斜角和流量提取率在代表实际发动机状况的范围内变化。发现局部传热值超过完全发展的湍流通道流相关水平的 6 倍。最大传热强化区域出现在孔入口的下游。进行计算和实验流动诊断以研究导致观察到的传热分布的机制。上游边界层的去除和涡对产生的下洗被发现是重要的现象。版权所有 © 1992 ASME
Detailed heat transfer measurements were made near the entrance to a single film cooling hole using a transient liquid crystal technique in a large scale (100X) model. The hole inclination angle and flow extraction rate were varied across a range representative of actual engine conditions. Local values of heat transfer were found to exceed 6 times the levels associated with fully developed, turbulent channel flow. The region of maximum heat transfer enhancement occurred downstream of the hole entrance. Computational and experimental flow diagnostics were performed to investigate the mechanisms responsible for the observed heat transfer distributions. The removal of the upstream boundary layer and the downwash created by a vortex pair were found to be important phenomena.Copyright © 1992 by ASME