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Numerical investigation of semiempirical relations representing the local Nusselt number magnitude of a pin fin heat sink

机译:半透明关系的数值研究,代表销翅片散热器的局部露出数量大小

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摘要

Heat transfer augmentation study using air jet impingement has recently attained great interest toward electronic packaging systems and material processing industries. The present study aims at developing a nondimensional semiempirical relation, which represents the cooling rate (N_u) in terms of different geometric and impinging parameters. The spacing of the fin (S/d_p) and the fin heights (H/d_p) are the geometric parameters, while the impinging Reynolds number (Re) and nozzle-target spacing (Z/d) are the impinging parameters. During the plot of the Nusselt profile, three vital secondary peaks are observed due to local turbulence of air over the heat sink. To incorporate this nonlinear behavior of the Nusselt profile in developing nondimensional empirical relations, the Nusselt profiles are divided into different regions of secondary rise and fall. Four different sets of the semiempirical relation using regression analysis are proposed for Z/d<6, H/d_p ≤ 4.8 with S/d_p≤ 1.58, S/dp_> 1.58 and for Z/d>6, H/d_p > 4.8 with S/d_p ≤ 1.58, S/d_p> 1.58. These empirical relations benefit the evaluation of the cooling rate (JVu) without any experimentation or simulation.
机译:使用空气喷射冲击的传热增强研究最近迈出了对电子包装系统和材料加工行业的兴趣。本研究旨在开发一种非潜能的半透镜关系,其代表不同几何和撞击参数方面的冷却速率(N_U)。鳍片(S / D_P)和鳍高度(H / D_P)的间距是几何参数,而撞击雷诺数(RE)和喷嘴 - 目标间隔(Z / D)是撞击参数。在露起曲线图中,由于散热器上的空气局部湍流,观察到三个重要的二次峰。为了纳入新的非线性行为,在发育非潜在的经验关系方面,纽带轮廓分为二次上升和下降的不同区域。用S /D_P≤1.58,S / DP_> 1.58和H / D_P> 4.8,提出了使用回归分析的四组使用回归分析的半透视关系。用S /D_P≤1.58,S / DP_> 1.58,H / D_P> 4.8 S /D_P≤1.58,S / D_P> 1.58。这些实证关系有利于在没有任何实验或模拟的情况下评估冷却速率(JVU)。

著录项

  • 来源
    《Heat transfer》 |2019年第5期|1857-1888|共32页
  • 作者单位

    Mechanical Engineering Department Mukesh Patel School of Technology Management & Engineering NMIMS University Mumbai Maharashtra India;

    Mechanical Engineering Department Veermata Jijabai Technological Institute Mumbai Maharashtra India;

    Mechanical Engineering Department International Islamic University of Malaysia Kuala Lumpur Malaysia;

    Mechanical Engineering Department Cracow University of Technology Krakow Poland;

    Mechanical Engineering Department Cracow University of Technology Krakow Poland;

    Mechanical Engineering Department Cracow University of Technology Krakow Poland;

    Mechanical Engineering Department Mukesh Patel School of Technology Management & Engineering NMIMS University Mumbai Maharashtra India;

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

    heat sinks; heat transfer; heat transfer enhancement; numerical simulation; Nusselt number; Reynolds number;

    机译:散热片;传播热量;传热增强;数值模拟;露房;Reynolds号码;

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