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Numerical Investigation on the Heat Transfer and Flow Characteristics of a Leading Edge Impingement Cooling System for Low Pressure Turbine Vanes

机译：低压涡轮叶片前缘冲击冷却系统传热和流动特性的数值研究

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摘要

Deep insight on the flow physics driving the surface heat transfer phenomena in impingement cooling configurations is possible by the use of CFD simulations. Under the current work the main flow features affecting the heat transfer in a particular impingement cooling configuration used in a low pressure turbine vane were investigated by a numerical simulation. The particular impingement cooling system is representative of the one used for cooling the leading edge of a contra-rotating Power Turbine (PT) vane representative of a small turboshaft engine. Existing experimental results were used for code validation. Comparison of results is performed in terms of heat transfer surface distributions, impingement rows stagnation line local distributions and streamwise distributions along planes over the impingement stagnation points. The CFD results present local deviations in the heat transfer compared with experimental results although the surface averaged value is well matched. Additional flow features having a significant effect on the obtained surface heat transfer results were investigated . In particular the generation of impingement and ejection stagnation regions and their effect in the local maxima and minima observed on the surface heat transfer is analyzed.
机译：通过使用CFD模拟，可以深入了解在冲击冷却配置中驱动表面传热现象的流动物理学。在当前工作下，通过数值模拟研究了在低压涡轮叶片中使用的特定冲击冷却配置中影响传热的主要流动特征。特定的冲击冷却系统代表了一种用于冷却代表小型涡轮轴发动机的反向旋转动力涡轮（PT）叶片前缘的系统。现有的实验结果用于代码验证。根据传热表面分布，冲击行停滞线局部分布以及沿冲击停滞点沿平面的流向分布进行结果比较。尽管表面平均值很好地匹配，但CFD结果与实验结果相比在传热中存在局部偏差。研究了对获得的表面传热结果有重要影响的其他流动特性。特别地，分析了撞击和喷射停滞区域的产生及其在表面传热中观察到的局部最大值和最小值中的作用。

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  • 来源
    《Recent researches in mechanics》|2011年|p.25-32|共8页
  • 会议地点 Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR)
  • 作者

    Pedro de la Calzada; Jose Javier Alvarez;

  • 作者单位

    Industria de Turbopropulsores SA, FTP, 28830 San Fernando de Henares, Madrid, Spain Ocean Engineering and Naval Architecture School, UPM, Madrid, Spain;

    Industria de Turbopropulsores SA, ITP, 28830 San Fernando de Henares, Madrid, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械制造工艺;
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