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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Assessment of vortex generator shapes for enhancing thermohydraulic performance of fluid flow in a channel equipped with perforated chevron plate-fin
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Assessment of vortex generator shapes for enhancing thermohydraulic performance of fluid flow in a channel equipped with perforated chevron plate-fin

机译：涡旋发生器形状的评估，提高配备有穿孔雪佛龙板翅片的通道中流体流动的热液流性能

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Purpose - The purpose of this paper is to investigate thermohydraulic characteristics of turbulent flow of water (4,000 = Re = 10,000) in a rectangular channel equipped with perforated chevron plat-fin (PCPF) with different vortex generators (VGs) shapes. Design/methodology/approach - First, three general shapes of VGs including rectangular, triangular and half circle, are compared to each other. Then, the various shapes of rectangular VGs, (horizontal, vertical and square) and triangular VGs, (forward, backward and symmetric) are evaluated. To comprehensively evaluate the thermohydraulic performance of the PCPF with various VG shapes, the relationship between the Colbum factor and the friction factor (j/f) is presented, then a performance index (η) is applied using these factors. Findings - Results show that the enhanced models of the PCPF, which are equipped with VGs, have higher values of j/f ratio and 77 as compared with the reference model (R). Further, the half-circle VG with the lowest pressure drop values (about 2.4% and 4.9%, averagely as compared with the S and ST vortex generators), shows the highest thermohydraulic performance among the proposed shapes. The maximum of performance index of 1.14 is found for the HC vortex generator at Re = 4,000. It is also found that the square and forward triangular VGs, have the best thermohydraulic performance among the rectangular and triangular VGs respectively and the highest performance index of 1.13 and 1.11 are reported for these VGs. Originality/value - The thermohydraulic performance of the PCPF with different vortex generators VGs shapes have been investigated.
机译：目的 - 本文的目的是研究在具有不同涡流发生器（VGS）的形状配有穿孔字形高原翅片（PCPF）的矩形通道的水的湍流（4000 = RE = 10,000）的热工水力特性。设计/方法/方法 - 首先，VG的三个一般形状，包括矩形，三角形和半圆形，是相互比较。然后，矩形的VG，（水平，垂直和方形）和三角形的VG的各种形状，（向前，向后和对称）进行评估。综合评价各种VG形状PCPF的热工性能，所述Colbum因子和摩擦系数（J / F）之间的关系被呈现，然后施加一个性能指数（η），使用这些因素。结果 - 结果表明，与参考模型（R）相比，PCPF的增强模式，配备具有VG，具有焦耳/ f比值较高值和77。另外，半圆VG具有最低的压力降的值（约2.4％和4.9％，平均为与S和ST涡流发生器相比），示出了所提出的形状中具有最高热工性能。的1.14性能指数的最大发现在RE = 4000的HC涡流发生器。它也发现，方形和三角形前进的VG，分别有长方形和三角形的VG中最好的热工性能和1.13和1.11的最高性能指标都报道了这些VG的。独创性/价值 - 用不同的涡流发生器VG的形状PCPF的热工性能进行了研究。

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