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首页> 外文期刊>Heat Transfer Engineering >Rewetting of Vertical Hot Surface during Round Water Jet Impingement Cooling
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Rewetting of Vertical Hot Surface during Round Water Jet Impingement Cooling

机译：圆形水射流冲击冷却过程中垂直热表面的再润湿

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摘要

A stainless steel vertical surface of 0.25 mm thickness at 800 ± 10℃ initial temperature was quenched by jet impingement technique. The rewetting phenomenon of the surface was investigated for the jet of 2.5 - 4.8 mm diameter and jet Reynolds number of 5000-24000. The observations are made from the stagnation point to the 24 mm downstream spatial locations, for both upside and downside directions. The quenching performance of the test surface was evaluated on the basis of different rewetting parameters i.e. rewetting temperature, wetting delay, and rewetting velocity. It has been observed that with the rise in jet Reynolds number and jet diameter, the surface rewetting performance increases. A correlation has also been proposed to determine the dimensionless rewetting velocity that predicts the experimental data within an error band of ±20 percent.
机译：通过喷射冲击技术淬火初始温度为800±10℃的0.25 mm厚度的不锈钢垂直表面。研究了直径为2.5-4.8 mm的射流和雷诺数为5000-24000的射流的表面再润湿现象。从停滞点到向上和向下方向的下游24 mm空间位置进行观测。基于不同的再润湿参数，即再润湿温度，润湿延迟和再润湿速度，来评估测试表面的淬火性能。已经观察到，随着射流雷诺数和射流直径的增加，表面再润湿性能提高。还提出了一种相关性，以确定无量纲的再润湿速度，该速度可在±20％的误差带内预测实验数据。

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  • 来源
    《Heat Transfer Engineering》 |2017年第15期|1209-1221|共13页
  • 作者

    Chitranjan Agrawal; Ravi Kumar; Akhilesh Gupta; Barun Chatterjee;

  • 作者单位

    Department of Mechanical Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, India;

    Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India;

    Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India;

    Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai, 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);
  • 原文格式 PDF
  • 正文语种 eng
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