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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical study on the effect of jet nozzle aspect ratio and jet angle on swirl cooling in a model of a turbine blade leading edge cooling passage
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Numerical study on the effect of jet nozzle aspect ratio and jet angle on swirl cooling in a model of a turbine blade leading edge cooling passage

机译：涡轮叶片前缘冷却通道模型中喷嘴长径比和喷嘴角度对涡流冷却影响的数值研究

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摘要

In this paper, a numerical simulation is performed to predict swirl cooling of an internal leading edge cooling passage model for a gas turbine blade. The swirling cooling performance and its effectiveness are investigated for cases of two rectangular section inlets that cause flow to impinge tangentially on the internal surface of the circular cooling passage. The effects of aspect ratio of the jet nozzle, jet angle and Reynolds numbers on the local and average flows and heat transfer are investigated. The results indicate that the pressure loss and global area weighted average Nusselt number on the swirl chamber increases with increases of Reynolds number, and increases with decreases of the jet nozzle aspect ratio. A correlation of the area weighted average Nusselt number over a range of parameters is suggested. The distribution of Nusselt number over the swirl chamber shows that the thermal stresses will be lowest with a 60° jet nozzle angle.
机译：在本文中，进行了数值模拟以预测燃气轮机叶片的内部前缘冷却通道模型的旋流冷却。对于两个矩形截面入口的情况，研究了涡旋冷却性能及其有效性，这些入口导致流量切向冲击圆形冷却通道的内表面。研究了喷嘴的长宽比，喷嘴角度和雷诺数对局部和平均流量以及传热的影响。结果表明，旋流室上的压力损失和全局面积加权平均Nusselt数随雷诺数的增加而增加，随喷嘴长径比的减小而增加。建议将区域加权平均努塞尔数与一系列参数相关联。 Nusselt数在旋流室内的分布表明，当喷嘴角度为60°时，热应力最低。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2015年第11期|986-1000|共15页
  • 作者

    Zhao Liu; Jun Li; Zhenping Feng; Terrence Simon;

  • 作者单位

    Institute of Turbomachinery, School of Energy & Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China,Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA;

    Institute of Turbomachinery, School of Energy & Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    Institute of Turbomachinery, School of Energy & Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Numerical simulation; Jet nozzle angle; Jet nozzle aspect ratio; Swirl cooling; Blade leading edge;

    机译：数值模拟喷嘴角度;喷嘴长宽比;旋流冷却;刀片前缘;

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