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首页> 外文期刊>Journal of Heat Transfer >An Experimental Investigation on Heat Transfer Characteristics of Hot Surface by Using CuO-Water Nanofluids in Circular Jet Impingement Cooling
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An Experimental Investigation on Heat Transfer Characteristics of Hot Surface by Using CuO-Water Nanofluids in Circular Jet Impingement Cooling

机译：CuO-水纳米流体在圆形射流冲击冷却中热表面传热特性的实验研究

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摘要

In the present study, an experimental investigation has been carried out to analyze the heat transfer characteristics of CuO-water nanofluids jet on a hot surface. A rectangular stainless steel foil (AISI-304, 0.15 mm thick) used as the test surface is electrically heated to obtain the required initial temperature (500 ℃). The distribution of surface heat flux on the target surface is evaluated from the recorded thermal images during transient cooling. The effect of nanoparticle concentration and Reynolds number of the nanofluids on the heat transfer characteristics is studied. Tests are performed for varied range of Reynolds number (5000 ≤Re≤ 12,000), two different CuO-water nanofluids concentration (Ф=0.15%, 0.6%) and two different nozzle to plate distance (l/d = 6, 12). The enhancement in Nusselt number for CuO-water nanofluids was found to be 14% and 90%, for nanofluids concentration of Ф = 0.15% and Ф = 0.60%, respectively, compared to pure water. The test surface characteristics after nanofluids jet impingement are studied using scanning electron microscope (SEM). Based on the investigation, a correlation among various parameters, namely, Reynolds number (Re), Prandtl number (Pr), nozzle to plate distance (l/d), and Nusselt number (Nu), is presented.
机译：在本研究中，已经进行了实验研究以分析在热表面上喷射的CuO-水纳米流体的传热特性。将用作测试表面的矩形不锈钢箔（AISI-304，厚度为0.15 mm）电加热以获得所需的初始温度（500℃）。根据瞬态冷却期间记录的热图像评估目标表面上表面热通量的分布。研究了纳米粒子的浓度和纳米流体的雷诺数对传热特性的影响。对雷诺数（5000≤Re≤12,000）的变化范围，两种不同的CuO-水纳米流体浓度（Ф= 0.15％，0.6％）和两种不同的喷嘴到平板距离（l / d = 6、12）进行测试。发现与纯水相比，CuO-水纳米流体的纳塞尔数增加分别为Ф= 0.15％和Ф= 0.60％，分别为14％和90％。使用扫描电子显微镜（SEM）研究了纳米流体射流撞击后的测试表面特性。基于调查，提出了雷诺数（Re），普朗特数（Pr），喷嘴到印版距离（l / d）和努塞尔特数（Nu）等各种参数之间的相关性。

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  • 来源
    《Journal of Heat Transfer》 |2018年第1期|012401.1-012401.10|共10页
  • 作者

    Mayank Modak; Sandesh S. Chougule; Santosh K. Sahu;

  • 作者单位

    Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore 453552, Madhya Pradesh, India;

    Department of Mechanical--Mechatronics Engineering, The LNM Institute of Information Technology, Rupa Ki Nangal, Post-Sumel, Jaipur 302031, Rajasthan, India;

    Mem. ASME Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore 453552, Madhya Pradesh, India;

  • 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

    jet impingement; nanofluids; CuO-water; thermal imaging technique; Nusselt number;

    机译：射流冲击纳米流体铜水热成像技术;努塞尔数;

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