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Experimental determination and analysis of the transverse pressure difference in a wire-wrapped rod bundle

机译：铁丝袋束横向压力差的实验测定与分析

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摘要

Wire-wrapped rod bundles are widely used in different applications for their enhanced heat transfer capability. The complex behavior of the flow in these rod bundles is strongly affected by the geometrical parameters, and flow regime. Experimental measurements of the transverse pressure difference (between adjacent faces) of a replica of a 61-rod wire-wrapped hexagonal bundle have been conducted under a wide range of Reynolds number (3,000-18,000), to study the effects of the wire azimuthal position for transition and turbulent flow regimes. As a result of the higher horizontal velocity, the transverse pressure difference was found to increase with the bundle Reynolds number. At higher Reynolds number, the maximum (positive) transverse pressure difference between two adjacent faces occurred when the wire is directed at the corner between these faces (θ = 0°), with the minimum (negative) occurring at a wire azimuthal location of θ = 120°. Pressure at adjacent walls equalizes at an angle 60° < θ < 120°, and near θ = -90°. For the lower Reynolds numbers investigated, a positive minimum pressure difference was observed at θ = 0°. The experimental results improved the understanding of the flow behavior in wire-wrapped bundles, and provided a unique set of data that can be used for validation of high-fidelity computational fluid dynamics codes.
机译：缠绕的杆束可广泛用于不同的应用，以增强传热能力。这些杆束中的流动的复杂行为受几何参数和流动制度的强烈影响。在多种雷诺数（3,000-18,000）下进行了61杆线包裹六边形束的复制品的横向压力差（相邻面之间）的实验测量，以研究电线方位角的影响用于过渡和湍流的流动制度。由于水平速度较高，发现横向压力差与束雷诺数增加。在较高的雷诺数时，当导线指向这些面（θ= 0°）之间的拐角时，发生两个相邻面之间的最大（正）横向压力差，其中在θ的电线方位角位置发生最小（负） = 120°。相邻壁处的压力在角度60°<θ<120°，近θ= -90°附近均衡。对于所研究的较低雷诺数，在θ= 0°观察到正的最小压力差。实验结果改善了对线包捆绑包中的流动行为的理解，并提供了一组独特的数据，可用于验证高保真计算流体动力学代码。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第5期|120958.1-120958.9|共9页
  • 作者

    Mason Childs; Rodolfo Vaghetto; Philip Jones; Nolan Goth; Yassin Hassan;

  • 作者单位

    Thermal Hydraulic Research Laboratory Department of Nuclear Engineering Texas A&M University College Station TX United States;

    Thermal Hydraulic Research Laboratory Department of Nuclear Engineering Texas A&M University College Station TX United States;

    Thermal Hydraulic Research Laboratory Department of Nuclear Engineering Texas A&M University College Station TX United States;

    Thermal Hydraulic Research Laboratory Department of Nuclear Engineering Texas A&M University College Station TX United States;

    Thermal Hydraulic Research Laboratory Department of Nuclear Engineering Texas A&M University College Station TX United States;

  • 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

    Transverse pressure difference; Wire-wrapped rod bundles; Reynolds number; Hexagonal duct;

    机译：横向压力差;缠绕杆束;雷诺数;六边形管道;

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