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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effects of oxide layer on Leidenfrost temperature during spray cooling of steel at high temperatures
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Effects of oxide layer on Leidenfrost temperature during spray cooling of steel at high temperatures

机译：高温钢水喷雾冷却过程中氧化层对莱顿弗罗斯特温度的影响

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摘要

Spray cooling is a common cooling method used in many high-temperature metal processes. Using a combined numerical and experimental approach, the influence of the oxide layer on the Leidenfrost temperature during spray cooling of surfaces at high temperatures was investigated. The heat transfer from a metal surface covered by an oxide layer is described using the concept of the effective heat transfer coefficient and this concept is extended to the Leidenfrost temperature. The effective Leidenfrost temperature is introduced. The prediction of the effective Leidenfrost temperature is compared with the numerical simulation and with the experiment, which was conducted on an austenitic stainless steel plate with varied oxide layer thicknesses. The test plate with the oxide layers was heated to 1000 ℃ and then cooled using flat jet nozzles. The present study confirms that the use of water in the spray cooling of hot surfaces can create a situation where the oxide layer not only serves as insulation but can also increase the cooling intensity for short time period, mainly by a shift of the Leidenfrost temperature.
机译：喷雾冷却是许多高温金属工艺中常用的冷却方法。使用数值和实验相结合的方法，研究了在高温表面喷雾冷却过程中氧化层对莱顿弗罗斯特温度的影响。使用有效传热系数的概念描述了从被氧化物层覆盖的金属表面传热，并且该概念扩展到莱顿弗罗斯特温度。引入有效的莱顿弗罗斯特温度。将有效莱顿弗罗斯特温度的预测与数值模拟和实验进行了比较，该实验是在具有不同氧化物层厚度的奥氏体不锈钢板上进行的。将带有氧化物层的测试板加热到1000℃，然后使用平板喷嘴冷却。本研究证实，在热表面的喷雾冷却中使用水会造成氧化层不仅用作绝缘层，而且还可能在短时间内增加冷却强度的情况，主要是通过莱顿弗罗斯特温度的变化。

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  • 来源
  • 作者

    M. Chabicovsky; M. Hnizdil; A.A. Tseng; M. Raudensky;

  • 作者单位

    Brno University of Technology, Faculty of Mechanical Engineering, Technicka 2896/2, 616 69 Brno, Czech Republic;

    Brno University of Technology, Faculty of Mechanical Engineering, Technicka 2896/2, 616 69 Brno, Czech Republic;

    School for Engineering of Matter, Transport and Energy, Arizona State University, 501 E. Tyler Mall, ECG 301, Tempe, AZ 85287 6106, United States;

    Brno University of Technology, Faculty of Mechanical Engineering, Technicka 2896/2, 616 69 Brno, Czech Republic;

  • 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

    Leidenfrost temperature; Spray cooling; Heat flux; High temperature; Oxide layer; Scale; Steel making;

    机译：莱顿弗罗斯特温度;喷雾冷却;热通量;高温;氧化层规模;炼钢;

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