利用下游附加的分流板，减少流经并排气缸的流体力

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2023-03-04 DOI:10.1007/s40571-023-00565-2

Ali Ahmed, Shams Ul Islam, Abdul Quayam Khan, Abdul Wahid

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引用次数: 3

摘要

通过二维数值模拟研究了低雷诺数(Re = 150)下带分流板的三方柱体尾部减阻和抑制旋涡脱落的特性。数值计算采用晶格玻尔兹曼方法进行。研究了不同气缸间距值和不同分离器板长度的情况。正如我们所观察到的，在非常小的间隔内，漩涡是完全混沌的。分离器板在抑制脱落和减少对物体的阻力方面是至关重要的。长度大于2的分流板在低间距值下完全控制射流相互作用。对于较小的间距和所选的最大分板长度，CDmean的最大百分比减小。此外，系统的研究表明，分流板除了显著降低阻力外，还能显著抑制波动升力。

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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Reduction of fluid forces for flow past side-by-side cylinders using downstream attached splitter plates

A two-dimensional numerical simulation is performed to investigate the drag reduction and vortex shedding suppression behind three square cylinders with attached splitter plates in the downstream region at a low Reynolds number (Re = 150). Numerical calculations are carried out using the lattice Boltzmann method. The study is carried out for various values of gap spacing between the cylinders and different splitter plate lengths. The vortices are completely chaotic at very small spacing, as observed. The splitter plates are critical in suppressing shedding and reducing drag on the objects. The splitter plates with lengths greater than two fully control the jet interaction at low spacing values. There is maximum percentage reduction in C_Dmean for small spacing and the selected largest splitter plate length. Furthermore, systematic investigation reveals that splitter plates significantly suppress the fluctuating lift in addition to drastically reducing the drag.

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来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.