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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effect of free-stream turbulence on turbine blade heat transfer and pressure coefficients in low Reynolds number flows
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Effect of free-stream turbulence on turbine blade heat transfer and pressure coefficients in low Reynolds number flows

机译：低雷诺数流中自由流湍流对涡轮叶片传热和压力系数的影响

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摘要

The effect of free-stream turbulence on heat transfer and pressure coefficients of a turbine blade was investigated in low Reynolds number flows. Cascade inlet Reynolds number based on blade chord length was varied from 15,700 to 105,000 and turbulence intensity was varied from 0.68% to 15.31%. This study documents the effect of increasing Reynolds number and free-stream turbulence in suppressing separation, promoting boundary layer transition, and enhancing heat transfer on blade surfaces. This may be the first documentation of both the pressure coefficient and Nusselt number distributions on the surfaces of a turbine blade at such low Reynolds numbers. The experimental data are useful for calibrating computational fluid dynamics (CFD) and direct numerical simulation (DNS) codes for predicting turbine blade heat transfer and flow behaviors.
机译：在低雷诺数流中，研究了自由流湍流对涡轮叶片的传热和压力系数的影响。基于叶片弦长的叶栅进气雷诺数从15,700到105,000不等，湍流强度从0.68％到15.31％不等。这项研究记录了增加雷诺数和自由流湍流在抑制分离，促进边界层过渡以及增强叶片表面传热方面的作用。这可能是在如此低的雷诺数下涡轮叶片表面压力系数和努塞尔数分布的第一篇文献。实验数据可用于校准计算流体动力学（CFD）和直接数值模拟（DNS）代码，以预测涡轮机叶片的传热和流动行为。

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