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Numerical investigation of flow unsteadiness and heat transfer on suction surface of rotating airfoils within a gas turbine cascade

机译：燃气轮机叶栅内旋转翼型吸力面流动不稳定性和传热的数值研究

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The effects of the periodical turbulence and pressure fluctuation on suction surface heat transfer over airfoils of a row of rotor blades with a certain type have been investigated numerically in this paper. The calculation is performed using model with the numerical results of pressure fluctuation and heat transfer performance over 4 sample points being analyzed and compared with existing experimental data. It shows that the static pressure change has significant impact on heat transfer performance of the fore suction surface, especially in the active region of the shock waves formed from the trailing edge of upstream nuzzles. While, for the rear suction surface, the flow turbulence contributes more to the heat transfer change over the surface, due to the reduced pressure oscillation through this region. Phase shifted phenomenon across the surface can be observed for both pressure and heat transfer parameters, which should be a result of turbulence migration and wake passing across the airfoil.
机译：数值研究了周期性湍流和压力波动对某类转子叶片行翼型吸力表面传热的影响。使用模型进行计算，分析了4个采样点的压力波动和传热性能的数值结果，并将其与现有实验数据进行比较。结果表明，静压的变化对前吸气面的传热性能有重要影响，特别是在上游上游小嘴的后缘形成的冲击波的有效区域。同时，对于后部吸入表面，由于通过该区域的压力波动减小，湍流对表面上的传热变化贡献更大。对于压力和传热参数，都可以观察到整个表面的相移现象，这应该是湍流迁移和尾流穿过翼型的结果。

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