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首页> 外文期刊>ISIJ international >Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface
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Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface

机译：狭缝喷嘴在高温板上的传热特性

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摘要

Heat transfer mechanism of a slit jet impingement was thoroughly studied to improve capacity and uniformity of a hot steel strip/plate during its ultrafast cooling or quenching. The impact angle has a significant influence on the heat transfer characteristics of the stationary slit jet impinging process. Heat transfer capability and rewetting front propagation, which include such parameters as q_(max), t_(MHF), and T_(MHF), differ significantly between the upstream and downstream regions. Parallel flow and intense sputtering in the downstream region are apparent for the forward-moving inclined slit jet impingement cooling process. The antiparallel flow in the upstream region is thinner, and the sputtering is reduced and is relatively stable. As the plate moves forward, the wetting front expands and forms almost a straight line with synchronized and uniform heat transfer. The inclined angle increases from 0 to 45°, which significantly increases the heat transfer intensity and shortens the time to nucleate boiling stage as well as the width of the transitional boiling region. A higher moving velocity reduces and promotes q_(max) moving to the downstream region.
机译：彻底研究了狭缝喷射冲击的传热机理，以提高热轧钢带/钢板在超快冷却或淬火过程中的容量和均匀性。冲击角对固定的狭缝射流冲击过程的传热特性有重要影响。上游和下游区域之间的传热能力和再润湿前部传播（包括q_（max），t_（MHF）和T_（MHF）等参数）明显不同。对于向前移动的倾斜狭缝射流冲击冷却过程，在下游区域出现了平行流动和强烈溅射。上游区域中的反平行流更薄，并且溅射减少并且相对稳定。随着板的向前移动，润湿的前部会扩展并形成几乎一条直线，并且同步且均匀地传递热量。倾斜角从0增加到45°，这将显着增加传热强度并缩短沸腾阶段成核的时间以及过渡沸腾区域的宽度。较高的移动速度会降低并促进q_（max）移动到下游区域。

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  • 来源
    《ISIJ international》 |2019年第5期|900-907|共8页
  • 作者

    Bingxing WANG; Zhixue LIU; Bo ZHANG; Zhaodong WANG; Guodong WANG;

  • 作者单位

    The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819 China;

    The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819 China;

    The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819 China;

    The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819 China;

    The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819 China;

  • 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
  • 中图分类
  • 关键词

    ultra-fast cooling; heat transfer; slit jet impingement; boiling phenomenon;

    机译：超快速冷却;传播热量;狭缝喷射冲击沸腾现象;

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