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Three-Dimensional Study of Multiple-Jet Cross Flow Cooling System with Single Array of Heat Sources

机译：单列热源多喷流错流冷却系统的三维研究

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摘要

The objective of this study is to predict fluid flow and thermal characteristics associated with forced convection cooling of an array of heat sources mounted in a three-dimensional duct by impinging jets in the presence of cross flow. The equations governing fluid flow and heat transfer are solved using Streamline Upwind / Petrov - Galerkin based finite element method. The role of three dimensional flow structures, horseshoe vortex and counter rotating vortex pair in overall heat transfer distribution is examined. A parametric study is performed to analyze the performance of jets in cross flow for various Reynolds numbers (Re = 100,250,500) and velocity ratios (VR = 1.0,5.0,10.0). It is observed that with the increase in velocity ratio, the enhancement of heat transfer from heat sources occurs due to increase in the dominance of jet flow accompanied by an unfavorable reduction in heat transfer owing to the increase in size of horseshoe vortex. From numerical studies, it can be concluded that VR = 5.0 exhibits higher overall surface averaged Nusselt number (51.7% over VR = 1.0 and 44.1% over VR = 10.0 for Re = 500) compared to other velocity ratios considered in this study.
机译：这项研究的目的是通过在存在横流的情况下撞击射流，来预测与安装在三维管道中的一系列热源的强制对流冷却相关的流体流动和热特性。使用基于Streamline Upwind / Petrov-Galerkin的有限元方法求解控制流体流动和传热的方程。研究了三维流动结构，马蹄涡和反向旋涡对在整体传热分布中的作用。进行了参数研究，以分析各种雷诺数（Re = 100,250,500）和速度比（VR = 1.0,5.0,10.0）时射流在横流中的性能。可以看出，随着速度比的增加，由于射流的支配性增加而导致热源传热的增强，同时由于马蹄涡旋尺寸的增大不利于传热的减少。从数值研究可以得出结论，与本研究中考虑的其他速度比相比，VR = 5.0表现出更高的总体表面平均Nusselt值（VR = 1.0时为51.7％，Re = 500时为VR = 10.0时为44.1％）。

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  • 来源
    《Heat Transfer Engineering》 |2018年第4期|252-267|共16页
  • 作者

    Sai Rajesh Mahapatro; Karaiyan Arul Prakash;

  • 作者单位

    Fluid Mechanics Laboratory, Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, India;

    Fluid Mechanics Laboratory, Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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