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首页> 外文期刊>International Journal of Heat and Mass Transfer >Rewetting of a hot horizontal surface through mist jet impingement cooling
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Rewetting of a hot horizontal surface through mist jet impingement cooling

机译：通过雾状喷射冲击冷却对热的水平表面进行重新润湿

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摘要

An experimental investigation has been carried out to study the rewetting behaviour of a hot horizontal stainless steel surface during the mist jet impingement cooling. The experiments have been performed to study the rewetting behaviour for three different initial surface temperatures viz. 255, 355, 565 ℃. An axis-symmetric nozzle has been used to develop the mist jet of constant flow rate. The variation in surface temperature has been acquired up to 20 mm downstream spatial locations away from the stagnation point. It has been observed that unlike liquid jet impingement cooling the rise in surface initial temperature increases the rewetting temperature and the wetting delay increase with rise in the initial surface temperature but the rewetting velocity reduces. Further, the maximum surface heat flux is the highest at 20 mm spatial location for 565 ℃ initial surface temperature. Whereas, at the stagnation point, the maximum surface heat flux is not affected by the change in surface initial temperature.
机译：已经进行了实验研究以研究热的水平不锈钢表面在雾状喷射撞击冷却期间的再润湿行为。已经进行了实验以研究三种不同初始表面温度的再润湿行为。 255、355、565℃。已经使用轴对称喷嘴来产生恒定流速的雾状喷嘴。在距停滞点最多20毫米的下游空间位置，已经获得了表面温度的变化。已经观察到，与液体喷射冲击冷却不同，表面初始温度的升高增加了再润湿温度，并且润湿延迟随着初始表面温度的升高而增加，但是再润湿速度降低了。此外，对于565℃的初始表面温度，最大表面热通量在20 mm空间位置处最高。而在停滞点，最大表面热通量不受表面初始温度变化的影响。

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  • 作者

    Chitranjan Agrawal; Oisin F. Lyons; Ravi Kumar; Akhilesh Gupta; Darina B. Murray;

  • 作者单位

    Department of Mechanical and industrial Engineering, Indian Institute of Technology Roorkee. Roorkee, Uttrakhand 267447, India;

    Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, Ireland;

    Department of Mechanical and industrial Engineering, Indian Institute of Technology Roorkee. Roorkee, Uttrakhand 267447, India;

    Department of Mechanical and industrial Engineering, Indian Institute of Technology Roorkee. Roorkee, Uttrakhand 267447, India;

    Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, Ireland;

  • 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

    Heat flux; Mist jet; Rewetting; Stagnation point; Transient cooling;

    机译：热通量;雾喷射重新润湿;停滞点;瞬态冷却;

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