壁面加热对湍流管道中发生的近壁逆流事件特征的影响

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-08-21 DOI:10.1134/S0021894424010139

I. V. Chuprov, V. A. Ivashchenko, R. I. Mullyadzhanov, D. I. Zaripov

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引用次数: 0

摘要

摘要直接数值模拟用于研究管道中各种冷却剂湍流时，壁面加热对近壁面反向流特性的影响。在被动标量近似和低马赫数近似中都考虑了温度场。根据平均流速和管道半高，得到了定性和定量结果，描述了在雷诺数（\mathrm{Re}= 3150\ ）下所有情况下发生近壁逆流的概率。结果表明，在所考虑的情况下，管壁加热会使近壁逆流形成的概率增加两倍或三倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

EFFECT OF WALL HEATING ON THE CHARACTERISTICS OF NEAR-WALL REVERSE FLOW EVENTS OCCURRING IN A TURBULENT DUCT

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EFFECT OF WALL HEATING ON THE CHARACTERISTICS OF NEAR-WALL REVERSE FLOW EVENTS OCCURRING IN A TURBULENT DUCT

Direct numerical simulation is used to study the effect of wall heating on the characteristics of a near-wall reverse flow during a turbulent stream of various coolants in a duct. A temperature field is considered both in a passive scalar approximation and in a low Mach number approximation. Qualitative and quantitative results are obtained that characterize the probability of occurrence of a near-wall reverse flow in all the cases considered at a Reynolds number \(\mathrm{Re}= 3150\) based on mean flow velocity and duct half-height. It is revealed that, in the cases considered, the wall heating causes a two- or a threefold increase in the probability of near-wall reverse flow formation .

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.