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首页> 外文期刊>International Journal of Heat and Mass Transfer >The effect of pulsating parameters on the spatiotemporal variation of flow and heat transfer characteristics in a ribbed channel of a gas turbine blade with the pulsating inlet flow
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The effect of pulsating parameters on the spatiotemporal variation of flow and heat transfer characteristics in a ribbed channel of a gas turbine blade with the pulsating inlet flow

机译：脉动入口流动脉动入口流动脉动通道脉冲和传热特性的脉动参数的影响

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摘要

This paper presents an investigation on the cooling performance in a ribbed channel with the pulsating inlet flow. The flow structures and heat transfer characteristics are simulated by solving the three-dimensional Unsteady Reynolds-Averaged Navier-Stokes equations (U-RANS) and the Shear Stress Transport (SST) turbulence model coupled with the γ-Re_θ transition. The influence of pulsating parameters in terms of pulsating amplitudes and frequencies on the cooling performance are evaluated at the Reynold number of 10000. The results obtained show that the coolant velocity variation corresponds to the inlet velocity variation, almost the sinusoidal curve shape. The heat transfer performance influenced by the turbulence intensity is also the sinusoidal curve shape and increases with increasing pulsating amplitudes and frequencies. The pressure loss penalty related to the flow characteristics is also the sinusoidal curve shape while the thermal performance indexes at four time frames (1T/4, 2T/4, 3T/4 and 4T/4) show the 90-degree phase difference with the sinusoidal curve. Additionally, the thermal performance increases with increasing pulsating amplitudes and frequencies.
机译：本文介绍了具有脉动入口流动的罗纹通道中的冷却性能的研究。通过求解三维非稳态雷诺平均天文（U-RAN）和与γ-re_θ转换耦合的剪切应力传输（SST）湍流模型来模拟流动结构和传热特性。在雷诺数10000中评估脉动参数对脉动幅度和频率的影响。获得的结果表明，冷却剂速度变化对应于入口速度变化，几乎是正弦曲线形状。受湍流强度影响的传热性能也是正弦曲线形状，随着脉动幅度和频率的增加而增加。与流动特性相关的压力损失也是正弦曲线形状，而四个时间框架（1T / 4，2T / 4，3T / 4和4T / 4）的热性能指标显示出90度相位差正弦曲线。另外，热性能随着脉动幅度和频率的增加而增加。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第6期|119609.1-119609.22|共22页
  • 作者

    Daren Zheng; Xinjun Wang; Qi Yuan;

  • 作者单位

    Institute of Turbomachinery Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment Xi'an Jiaotong University Xi'an 710049 China Department of Mechanical and Industrial Engineering University of Toronto Toronto ON M5S 3G8 Canada;

    Institute of Turbomachinery Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment Xi'an Jiaotong University Xi'an 710049 China;

    Institute of Turbomachinery Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment Xi'an Jiaotong University Xi'an 710049 China;

  • 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

    Internal cooling; Pulsating inlet flow; Spatiotemporal variation; Amplitude and frequency; Thermodynamics of gas turbines;

    机译：内部冷却;脉动入口流动;时尚变异;幅度和频率;燃气轮机的热力学;

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