Numerical simulation of vortex induced vibration in heat exchanger tube bundle at low Reynolds number

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2017-12-28 DOI:10.3329/JNAME.V14I2.25894

Asif Khan, S. Khushnood, N. Saqib, I. Shahid

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引用次数: 1

Abstract

It is sound recognized that when the tube is forced to vibrate or is naturally excited to sufficient amplitudes by flow-induced forces, cyclones peeling phenomena arises at downstream of a tube which clues to vibration in the tube. Two-dimensional numerical recreation model for the computation of flow induced vibration of heat exchanger tube bundle imperiled to cross- flow is proficient in current research. Computational Fluid Dynamics (CFD) tool, GAMBIT (grid generation) and ANSYS FLUENT (fluid flow analysis) are operated during numerical investigations. k-epsilon model is used to solve the Navier Stokes equations. Lift coefficient graph derived from analysis is used to predict the vortex shedding frequency using Fast Fourier Transform (FFT). The results of flow rate, Strouhal number, Reduced velocity, Natural frequency of tube as found from the experimental data has been verified numerically for a Reynolds number range of 4.45 × 104

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低雷诺数下换热器管束涡激振动数值模拟

人们已经认识到，当管道被迫振动或被流体诱导力自然激发到足够的振幅时，旋风分离器剥离现象会在管道下游出现，这表明管道中存在振动。用二维数值重建模型计算有交叉流危险的换热器管束的流激振动是目前研究的热点。在数值研究过程中，使用了计算流体动力学（CFD）工具、GAMBIT（网格生成）和ANSYS FLUENT（流体流动分析）。ε模型用于求解Navier-Stokes方程。通过分析得出的升力系数图用于使用快速傅立叶变换（FFT）预测旋涡脱落频率。在雷诺数为4.45×104＜Re＜4.65×104的情况下，对实验数据中的流量、斯特劳哈尔数、降速和管固有频率的结果进行了数值验证。结果表明，实验结果和数值计算结果吻合较好。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.