Numerical investigation and triple-parameters correlations development on the dynamic characteristics of a turbulent offset jet

IF 1.5 4区工程技术 Q3 MECHANICS

Journal of Turbulence Pub Date : 2020-12-29 DOI:10.1080/14685248.2020.1863416

M. Ajmi, N. Hnaien, Saloua Marzouk, Lioua Kolsi, Kaouther Ghachem, H. B. Aissia

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引用次数: 2

Abstract

ABSTRACT The present numerical study aims to numerically investigate the dynamic and turbulent characteristics of a two-dimensional and turbulent offset jet. Three different parameters were investigated: The Reynolds numbers (Re) which was varied from 10000 to 30000, wall inclination angle (α) that was from −20° to +20° and finally the offset ratio (OR) which extends from 3.25–13. Ansys Fluent was numerical CFD solver used in this present investigation. The simultaneous effects of the OR, Re and α were investigated in details. The velocity and pressure contours showed that these three parameters do not contribute equally in the development of such a flow. Also, the turbulent characteristics, such as the turbulence intensities and energies depicted how each parameter influences, separately, the turbulent flow production. Furthermore, different of tripled parameters correlations were developed. These correlations may be of help to more understand certain offset jet flow features more accurately and to predict their exact values.

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湍流偏置射流动力学特性的数值研究和三参数关联发展

摘要本数值研究旨在对二维湍流偏置射流的动力学和湍流特性进行数值研究。研究了三个不同的参数：雷诺数（Re）在10000到30000之间变化，壁倾角（α）在−20°到+20°之间变化，最后偏移比（OR）在3.25到13之间变化。Ansys Fluent是本研究中使用的CFD数值求解器。详细研究了OR、Re和α的同时作用。速度和压力等值线表明，这三个参数对这种流动的发展没有同等的贡献。此外，湍流特性，如湍流强度和能量，描述了每个参数如何单独影响湍流的产生。此外，还建立了不同的三倍参数相关性。这些相关性可能有助于更准确地理解某些偏移射流特征，并预测其确切值。

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

Journal of Turbulence 物理-力学

CiteScore

3.90

自引率

5.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Turbulence is a physical phenomenon occurring in most fluid flows, and is a major research topic at the cutting edge of science and technology. Journal of Turbulence ( JoT) is a digital forum for disseminating new theoretical, numerical and experimental knowledge aimed at understanding, predicting and controlling fluid turbulence. JoT provides a common venue for communicating advances of fundamental and applied character across the many disciplines in which turbulence plays a vital role. Examples include turbulence arising in engineering fluid dynamics (aerodynamics and hydrodynamics, particulate and multi-phase flows, acoustics, hydraulics, combustion, aeroelasticity, transitional flows, turbo-machinery, heat transfer), geophysical fluid dynamics (environmental flows, oceanography, meteorology), in physics (magnetohydrodynamics and fusion, astrophysics, cryogenic and quantum fluids), and mathematics (turbulence from PDE’s, model systems). The multimedia capabilities offered by this electronic journal (including free colour images and video movies), provide a unique opportunity for disseminating turbulence research in visually impressive ways.