Effect of rotation on forced turbulent flow and heat transfer in a ribbed U-duct

IF 0.6 4区工程技术 Q4 ENGINEERING, AEROSPACE

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI:10.1134/S0869864324060015

V. V. Ris, A. M. Levchenya, S. A. Galaev, I. A. Ignatiev

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Abstract

The paper presents a method and simulation results for turbulent airflow and heat transfer in a U-shaped square duct with straight sections and with two ribbed opposite sides. For a flow with Reynolds number of 6·10⁴ and Prandtl number of 2.5, the numerical solution method was validated by comparing the simulated and experimental data on local heat and mass transfer in geometrically identical U-ducts; the ribs inclined to the duct axis by 45 and 60 deg. For one of these ducts with the rib inclination angle of 45 deg (at the same Reynolds number and Prandtl number of 0.71), the flow patterns and heat transfer were calculated for a stationary state and for a mode with rotation (with the rotation parameter values of 0.1 and 0.25). The rotation axis is perpendicular to the duct axis and parallel to the duct bending plane. The numerical data for the U-shaped duct are compared with the data for a fully developed (periodic) flow and heat transfer for a straight duct with ribbing. It is shown that for a U-duct, the effect of rotation has a positive influence on heat transfer enhancement.

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旋转对带肋u型管道内强迫湍流流动和换热的影响

本文介绍了一种u型直肋方形风管内紊流和换热的计算方法和模拟结果。对于雷诺数为6·104和普朗特数为2.5的流动，通过对几何形状相同的u型管内局部传热传质的模拟和实验数据的比较，验证了数值求解方法的有效性；肋向风管轴线倾斜45°和60°。对于其中一个肋倾角为45°的风管（在相同的雷诺数和普朗特数0.71下），计算了固定状态和旋转模式（旋转参数值为0.1和0.25）的流型和传热。旋转轴垂直于风管轴线，平行于风管弯曲面。将u形风管的数值数据与带肋的直管充分发展（周期）流动和换热的数值数据进行了比较。结果表明，对于u型管道，旋转效应对强化传热有积极的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermophysics and Aeromechanics THERMODYNAMICS-MECHANICS

CiteScore

0.90

自引率

40.00%

发文量

审稿时长

>12 weeks

期刊介绍： The journal Thermophysics and Aeromechanics publishes original reports, reviews, and discussions on the following topics: hydrogasdynamics, heat and mass transfer, turbulence, means and methods of aero- and thermophysical experiment, physics of low-temperature plasma, and physical and technical problems of energetics. These topics are the prior fields of investigation at the Institute of Thermophysics and the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), which are the founders of the journal along with SB RAS. This publication promotes an exchange of information between the researchers of Russia and the international scientific community.