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首页> 外文期刊>Heat Transfer Engineering >Influence of Geometrical Parameters of Open-Cell Aluminum Foam on Thermohydraulic Performance
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Influence of Geometrical Parameters of Open-Cell Aluminum Foam on Thermohydraulic Performance

机译：开孔铝泡沫的几何参数对热工水力性能的影响

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摘要

The influence of the geometry of open-cell aluminum foam on the thermohydraulic behavior in channel flow is investigated. The mean cell diameter and the strut cross-sectional surface area are chosen as geometrical parameters, ranging respectively between 1.2 and 5.2 mm and between 0.0125 and 0.17 mm~2. The flow arrangement and the operating conditions are fixed. A numerical model is implemented in a commercial solver, based on volume averaging theory. The model is validated against experimental data. The porous properties, which take the sub-REV scaled physics into account, are written as a function of both geometrical parameters. The thermohydraulic characteristics of 16 well-chosen foams are used to build a surrogate model. An ordinary Kriging model is used for this, indicating that the root mean square error of interpolated results is lower than 0.6 and 3% for, respectively, heat transfer and total pressure. The resulting heat transfer and total pressure difference are nondimensionalized by dividing them by the results obtained from an empty channel. The relative increment of the pressure drop is an order of magnitude higher than the increment observed for heat transfer. Consequently, the applied performance evaluation criterion (defined as the ratio of dimensionless heat transfer versus total pressure) is mainly influenced by the hydraulic performance. For the given application, a clear optimum is found. The proposed method allows performing the parameter study with acceptable computational cost with a sufficient level of detail from an engineering perspective.
机译：研究了开孔泡沫铝的几何形状对通道流动中热工液压行为的影响。选择平均孔直径和支杆横截面面积作为几何参数，分别在1.2至5.2mm之间和0.0125至0.17mm〜2之间。流量安排和运行条件是固定的。基于体积平均理论，在商业求解器中实现了数值模型。该模型已针对实验数据进行了验证。考虑到亚REV比例缩放的物理性质的多孔性被写入为两个几何参数的函数。 16种精心选择的泡沫的热工水力特性用于建立替代模型。为此，使用了普通的克里格模型，表明插值结果的均方根误差对于传热和总压分别小于0.6％和3％。通过将它们除以从空通道获得的结果，可以对传热和总压差进行无量纲化处理。压降的相对增量比对于传热观察到的增量高一个数量级。因此，所应用的性能评估标准（定义为无因次传热与总压力之比）主要受液压性能影响。对于给定的应用，找到了明确的最佳选择。所提出的方法允许以可接受的计算成本以足够的细节水平从工程学角度执行参数研究。

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  • 来源
    《Heat Transfer Engineering》 |2013年第15期|1202-1215|共14页
  • 作者

    PETER DE JAEGER; CHRISTOPHE TJOEN; HENK HUISSEUNE; BERND AMEEL; SVEN DE SCHAMPHELEIRE; MICHEL DE PAEPE;

  • 作者单位

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium,NV Bekaert SA, Zwevegem, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Ghent, Belgium;

  • 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);
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  • 正文语种 eng
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