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含多个矩形加热器通道内流动沸腾传热性能的介观数值方法研究

李迎雪 王浩原 娄钦

李迎雪,王浩原,娄钦. 含多个矩形加热器通道内流动沸腾传热性能的介观数值方法研究 [J]. 应用数学和力学,2022,43(7):1-13 doi: 10.21656/1000-0887.420325
引用本文: 李迎雪,王浩原,娄钦. 含多个矩形加热器通道内流动沸腾传热性能的介观数值方法研究 [J]. 应用数学和力学,2022,43(7):1-13 doi: 10.21656/1000-0887.420325
LI Yingxue, WANG Haoyuan, LOU Qin. Mesoscopic Numerical Study on Flow Boiling Heat Transfer Performance in Channels With Multiple Rectangular Heaters[J]. Applied Mathematics and Mechanics. doi: 10.21656/1000-0887.420325
Citation: LI Yingxue, WANG Haoyuan, LOU Qin. Mesoscopic Numerical Study on Flow Boiling Heat Transfer Performance in Channels With Multiple Rectangular Heaters[J]. Applied Mathematics and Mechanics. doi: 10.21656/1000-0887.420325

含多个矩形加热器通道内流动沸腾传热性能的介观数值方法研究

doi: 10.21656/1000-0887.420325
基金项目: 国家自然科学基金(51976128);上海市自然科学委员会项目(19ZR1435700)
详细信息
    作者简介:

    李迎雪(1997—),女,硕士(E-mail:18238646514@163.com)

    娄钦(1984—),女,副教授,博士,博士生导师 (通讯作者. E-mail:louqin560916@163.com

  • 中图分类号: O359 +.1

Mesoscopic Numerical Study on Flow Boiling Heat Transfer Performance in Channels With Multiple Rectangular Heaters

  • 摘要: 采用格子Boltzmann方法对恒定壁温条件下含多个矩形加热器通道内流动沸腾现象进行了数值研究。主要研究了加热器间距、加热器长度和加热器表面润湿性对气泡形态、生成气泡面积以及加热器表面热流密度大小的影响。结果表明,气泡生长速率随着加热器间距的增大而加快,较大的气泡面积促使成核气泡提前从加热器表面离开,加热器间距从250个格子增加到1000个格子时,对应的沸腾传热性能提高了12%。另一方面,加热器长度越长,气泡成核时间以及与加热器表面脱离的时间越早、沸腾传热性能越好,加热器长度从16个格子增加到22个格子时,其传热性能可以提高13%。此外, 亲水性表面的气泡成核时间晚于疏水性表面的气泡成核时间,与亲水性表面相比,疏水性表面在气泡脱离加热器之后存在残余气泡。且亲水性表面的平均热流密度和产生的气泡面积小于疏水性表面,当接触角从77°变化到120°时,其传热性能提高了26%。最后通过正交试验方案发现,加热器表面的润湿性对流动沸腾传热性能的影响最大,加热器长度对流动沸腾传热性能的影响最小。
  • 图  1  计算域示意图

    Figure  1.  Computational domain

    图  2  重力加速度g与气泡脱离直径d之间的关系

    Figure  2.  The relationship between the gravitational acceleration g and the bubble departure diameter d

    图  3  D=1000时计算域的密度分布

    Figure  3.  Density distribution at D=1000

    图  4  不同加热器间距时计算域的密度分布:(a)D=500;(b)D=333;(c)D=250

    Figure  4.  Density distribution with different heaters distance: (a)D=500; (b) D=333; (c) D=250

    图  5  不同加热器间距下的气泡面积变化

    Figure  5.  Bubble area with different heaters distance

    图  6  不同加热器间距下加热器表面平均热流密度的变化:(a)加热器表面空间平均热流密度随时间的变化;(b)加热器表面空间-时间平均热流密度

    Figure  6.  Heat flux on the heater surface with different heaters distance: (a) temporal variations of spatial average heat flux on the heater surface; (b) temporal and spatial average heat flux on the heater surface

    图  7  不同加热器长度时计算域的密度分布:(a)L=16;(b)L=18;(c)L=20;(d)L=22

    Figure  7.  Density distribution with different heater length: (a) L=16; (b) L=18; (c) L=20; (d) L=22

    图  8  不同加热器长度下的气泡面积变化

    Figure  8.  Bubble area with different heater length

    图  9  不同加热器长度下加热器表面平均热流密度的变化:(a)加热器表面空间平均热流密度随时间的变化;(b)加热器表面空间-时间平均热流密度

    Figure  9.  Heat flux on the heater surface with different heater length: (a) temporal variations of spatial average heat flux on the heater surface; (b) temporal and spatial average heat flux on the heater surface

    图  10  亲水性表面(θ=77°)时计算域的密度分布

    Figure  10.  Density distribution on hydrophilic surface(θ=77°)

    图  11  疏水性表面(θ=120°)时计算域的密度分布

    Figure  11.  Density distribution on hydrophobic surface(θ=120°)

    图  12  不同润湿性表面下加热器表面平均热流密度随时间的变化

    Figure  12.  Temporal variations of spatial average heat flux on the heater surface with different wettability surface

    图  13  不同润湿性表面下气泡面积的变化

    Figure  13.  Bubble area with different wettability surface

    表  1  网格无关性

    Table  1.   Grid independence

    mesh sizemean heat flux Qave
    Lx × Ly=500 × 1501.027 × 10−2
    Lx × Ly=1000 × 3001.179 × 10−2
    Lx × Ly=2000 × 6001.184 × 10−2
    下载: 导出CSV

    表  2  正交试验表及数据分析

    Table  2.   Orthogonal test table and data analysis

    test numberlength Ldistance Dcontact angle θtest index (mean heat flux) Qave
    118(①)333(①)77°(①)8.463 × 10−3
    218(①)500(②)90°(②)1.043 × 10−2
    318(①)1000(③)120°(③)1.264 × 10−2
    420(②)333(①)90°(②)1.032 × 10−2
    520(②)500(②)120°(③)1.273 × 10−2
    620(②)1000(③)77°(①)9.856 × 10−3
    722(③)333(①)120°(③)1.327 × 10−2
    822(③)500(②)77°(①)9.087 × 10−3
    922(③)1000(③)90°(②)1.116 × 10−2
    A1.051 × 10−21.069 × 10−29.135 × 10−3
    B1.097 × 10−21.075 × 10−21.064 × 10−2
    C1.117 × 10−21.122 × 10−21.288 × 10−2
    R6.611 × 10−45.353 × 10−43.748 × 10−3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-28
  • 修回日期:  2022-02-28
  • 网络出版日期:  2022-06-21

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