Measurement of Heat Transfer Coefficient Distributions and Flow Field in a Model of a Turbine Blade Cooling Passage With Tangential Injection
Measurement of Heat Transfer Coefficient Distributions and Flow Field in a Model of a Turbine Blade Cooling Passage With Tangential Injection
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DOI：
10.1115/gt2006-90352
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
J. P. C. W. Ling;P. Ireland;N. Harvey
中科院分区：
文献类型：
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作者：
J. P. C. W. Ling;P. Ireland;N. Harvey
在涡轮机翼型的某些区域中，冷却系统设计者需要利用提供高传热系数的对流系统来冷却叶片。本文研究了一种适用于叶片前缘的切向喷射环形冷却通道。传热系数的测量采用传统的瞬态传热，液晶技术。将结果与Hedlund等人[1]进行的稳态实验的数据进行比较。冷却系统的性能进行了详细的比较，从早期的切向喷射实验的平均数据和局部传热系数预期从正常的冲击系统。通过数值计算和近壁速度测量，研究了涡流场。流动结构的研究导致了对高传热系数的流动机制的理解。涡流场也进行了研究，使用计算流体动力学和热线风速仪。后者的近壁测量与壁面定律和科尔本类比相结合，以验证流动和传热测量。© 2006 ASME
In certain regions of turbine aerofoils, cooling system designers need to cool the blades with convection systems that provide high heat transfer coefficients. The present research has investigated a circular cooling passage with tangential injection suitable for a blade leading edge. The heat transfer coefficients are measured using the conventional transient heat transfer, liquid crystal technique. The results are compared to the data from steady state experiments performed by Hedlund et al. [1]. The cooling system performance is compared in detail to average data from earlier tangential injection experiments and to local heat transfer coefficient expected from a normal impingement system. The vortex flow field was also studied by numerical prediction and near-wall velocity measurements. The investigation of the flow structure has led to understanding of flow mechanisms responsible for the high heat transfer coefficient. The vortex flow field was also investigated using computational fluid dynamics and with hot wire anemometry. The latter near wall measurements were combined with the law of the wall and Colburn analogy to validate the flow and heat transfer measurements.© 2006 ASME