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阵列射流冲击复合不同肋化表面的沸腾特性

张添 张畅 谢荣建 董德平

张添, 张畅, 谢荣建, 等 . 阵列射流冲击复合不同肋化表面的沸腾特性[J]. 北京航空航天大学学报, 2019, 45(10): 2035-2043. doi: 10.13700/j.bh.1001-5965.2019.0028
引用本文: 张添, 张畅, 谢荣建, 等 . 阵列射流冲击复合不同肋化表面的沸腾特性[J]. 北京航空航天大学学报, 2019, 45(10): 2035-2043. doi: 10.13700/j.bh.1001-5965.2019.0028
ZHANG Tian, ZHANG Chang, XIE Rongjian, et al. Boiling characteristics of array jet impingement with various pin-finned surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(10): 2035-2043. doi: 10.13700/j.bh.1001-5965.2019.0028(in Chinese)
Citation: ZHANG Tian, ZHANG Chang, XIE Rongjian, et al. Boiling characteristics of array jet impingement with various pin-finned surfaces[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(10): 2035-2043. doi: 10.13700/j.bh.1001-5965.2019.0028(in Chinese)

阵列射流冲击复合不同肋化表面的沸腾特性

doi: 10.13700/j.bh.1001-5965.2019.0028
详细信息
    作者简介:

    张添  女, 博士研究生。主要研究方向:用于高热流密度散热的先进热管理技术

    董德平  男, 博士, 研究员, 博士生导师。主要研究方向:空间载荷先进热管理技术

    通讯作者:

    董德平, E-mail: dongdeping@mail.sitp.ac.cn

  • 中图分类号: TK124

Boiling characteristics of array jet impingement with various pin-finned surfaces

More Information
  • 摘要:

    阵列射流冲击冷却技术可以有效地解决高热流密度器件的散热问题,为了验证受冲击表面强化传热结构对优化两相射流冷却性能的有效性,结合高速显微摄像手段,研究了不同肋化表面结构形态对受限式阵列射流冷却的流动、传热特性的影响。设计了2种含不同肋化表面形态:光滑切割针肋(0.6 mm×0.6 mm×1.0 mm)、外覆多孔烧结层的粗糙针肋(粒径为73~53 μm)。实验使用无水乙醇为工质,以光滑表面的射流冷却热沉为对照组,入口温度均为20℃,在固定工质流量7.5 mL/s下,随着加热热流密度由5 W/cm2增加至100 W/cm2时,热沉的换热系数均持续上升但增幅逐渐减小,未明显观察到沸腾相变的发生。对固定热流密度82.6 W/cm2、80.5 W/cm2改变工质流量(射流雷诺数)的实验工况,当工质流量由7.5 mL/s逐渐降低至1.0 mL/s时,可以非常明显地观测到射流腔内部工质由分层湍流逐步进入泡状流、弹状流及环状流,其分别对应起始沸腾区、核态沸腾区及膜态沸腾区。

     

  • 图 1  可视化复合阵列射流热沉结构示意图

    Figure 1.  Schematic diagram of visualized hybrid array jet heat sink structure

    图 2  肋化射流表面的基板尺寸示意图

    Figure 2.  Schematic diagram of baseplate dimension of pin-fined jet surface

    图 3  粗糙肋化表面实物图及SEM照片

    Figure 3.  Photographs and SEM images of porous coated pin-finned surface

    图 4  性能测试系统示意图

    Figure 4.  Schematic diagram of performance test system

    图 5  壁面过热度随热流密度的变化

    Figure 5.  Influence of heat flux on wall surface degree of superheat

    图 6  换热系数随热流密度的变化

    Figure 6.  Influence of heat flux on heat transfer coefficient

    图 7  换热系数随射流雷诺数的变化

    Figure 7.  Influence of jet Reynold number on heat transfer coefficient

    图 8  压力损失随射流雷诺数的变化

    Figure 8.  Influence of jet Reynold number on pressure loss

    图 9  Φ=82.6 W/cm2、流量qv减小的稳态工况气泡分布

    Figure 9.  Images of bubble distribution with decreasing flux qv and Φ=82.6 W/cm2 at steady-state conditions

    图 10  Φ=82.6 W/cm2qv=1.1 mL/s瞬态工况气泡分布

    Figure 10.  Images of bubble distributions with Φ=82.6 W/cm2 and qv=1.1 mL/s at transient conditions

    图 11  Φ=80.5 W/cm2、流量qv减小的稳态工况气泡分布

    Figure 11.  Images of bubble distribution with decreasing flux qv and Φ=80.5 W/cm2 at steady-state conditions

    图 12  Φ=80.5 W/cm2qv=5.8 mL/s瞬态工况气泡分布

    Figure 12.  Images of transient bubble distribution when Φ=80.5 W/cm2 and qv=5.8 mL/s at transient conditions

    图 13  Φ=80.5 W/cm2qv=1.5 mL/s瞬态工况气泡分布

    Figure 13.  Images of transient bubble distribution with Φ=80.5 W/cm2 and qv=1.5 mL/s at transient conditions

    表  1  阵列射流结构参数

    Table  1.   Array jet structure parameters

    mm
    参数 射流孔径 孔间距 孔板厚度 射流距离
    数值 0.5 6 3 3
    注:射流距离为射流孔板下表面至基板上表面(肋底部)。
    下载: 导出CSV

    表  2  实验不确定度

    Table  2.   Uncertainties of experiment

    %
    误差 参数 数值
    直接相对误差 T ±2
    TinTout ±0.75
    xDjet ±2
    qmqv ±0.2
    ρ ±0.6
    P ±0.25
    间接相对误差 Φ ±0.13
    Tw ±1
    ΔTm ±0.96
    h ±2.26
    Ujet ±0.2
    Re ±2.2
    ΔP ±0.25
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-01-22
  • 录用日期:  2019-02-16
  • 刊出日期:  2019-10-20

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