通道中层流的局部加速与倾斜双排沟槽中异常传热增强之间的相互关系

IF 1 4区工程技术 Q4 MECHANICS

Fluid Dynamics Pub Date : 2024-11-07 DOI:10.1134/S0015462824603139

S. A. Isaev, O. O. Mil’man, N. I. Mikheev, D. V. Nikushchenko, N. S. Dushin, A. A. Klyus, E. A. Osiyuk

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引用次数: 0

摘要

在入口处流动均匀、雷诺数 Re 值从 1000 到 5500 不等的情况下，研究了在带有两排 26 个倾斜角度为 ±45° 的密集凹槽的通道中层流分离流动和传热的反常增强（AELSFHT）。当最大流速达到无量纲单位 1.8 的数量级，球形入口段上方的壁层变薄时，局部流动加速度得到验证。在这种情况下，当 Re = 2500 时，距离壁面 y = 0.005 处的纵向流速增加到 1.4。通道中心的局部加速度与 AELSFHT 之间的相互关系已经确定，在 Re = 5500 时，负加速度的最小值为 -25，通道结构区域的相对散热量达到 5.2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Interrelation between the Local Acceleration of Laminar Flow in a Channel and the Anomalous Heat Transfer Enhancement in Inclined Two-Row Grooves

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Interrelation between the Local Acceleration of Laminar Flow in a Channel and the Anomalous Heat Transfer Enhancement in Inclined Two-Row Grooves

The anomalous enhancement of laminar separation flow and heat transfer (AELSFHT) is studied in a channel with two rows of 26 densely packed grooves inclined at angles of ±45° in the case of uniform flow at the entry and the Reynolds number Re varying from 1000 to 5500. The local flow acceleration is validated, when the greatest flow velocity becomes of the order of 1.8 in dimensionless units and the wall layer becomes thinner above the spherical entry segments. In this case, the longitudinal velocity increases to a value of 1.4 at a distance y = 0.005 from the wall for Re = 2500. The interrelation between the local acceleration at the channel center and the AELSFHT is established, the minimum value of the negative acceleration amounting to –25 at Re = 5500 and the relative heat removal from the structured region of the channel reaching up to 5.2.

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来源期刊

Fluid Dynamics MECHANICS-PHYSICS, FLUIDS & PLASMAS

CiteScore

1.30

自引率

22.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Fluid Dynamics is an international peer reviewed journal that publishes theoretical, computational, and experimental research on aeromechanics, hydrodynamics, plasma dynamics, underground hydrodynamics, and biomechanics of continuous media. Special attention is given to new trends developing at the leading edge of science, such as theory and application of multi-phase flows, chemically reactive flows, liquid and gas flows in electromagnetic fields, new hydrodynamical methods of increasing oil output, new approaches to the description of turbulent flows, etc.