水平90°弯管流型动态演化振动特性机理研究

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2023-03-20 DOI:10.1115/1.4062152

Ze-jun Liang, Chun-yu Guo, Chun Yang

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引用次数: 0

摘要

流体流动引起的管道振动会导致管道疲劳损坏，严重危及管道运行安全。本文旨在阐明弯管内气液两相流引起的管道振动的动态变化规律，以及不同气液比对两相流型动态演化的影响。流体体积法和C-C算法分别捕捉流型特征并重构流型相空间，进一步探索了动态流型演化的复杂信息。根据最大李雅普诺夫指数分析了每种流型的混沌特性。基于时域和频域，探讨了与流型演变相对应的振动特征机制，并根据动量平衡方程，探讨了弯管的原始激振力。仿真结果表明，VOF方法能够很好地捕捉由相间不稳定机制发展起来的段塞流特性。相空间重构后，流型的动态演化机制复杂，段塞流的混沌特性较强。流型的演变与波浪高度的增加有关。液相的表观速度对流型形成机制比对气相的e更敏感。波的振幅强烈地取决于Vsg和Vsl。主激振力脉动与动量通量脉动之间存在很强的相关性。

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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Research On Mechanism of Dynamic Evolution Vibration Characteristics of Horizontal 90° Elbow Flow Pattern

Pipeline vibration induced by fluid flow can cause pipeline fatigue damage, which seriously endangers the safety of the operation. This paper aims to clarify the dynamic variation law of pipeline vibration induced by gas-liquid two-phase flow in the elbow and the influence of different gas-liquid ratios on the dynamic evolution of two-phase flow patterns. The volume of Fluid (VOF) method and C-C algorithm capture the flow pattern characteristics and reconstruct the flow pattern phase space respectively, further exploring the complex information of dynamic flow pattern evolution. The chaotic characteristics of each flow pattern are analyzed according to the maximum Lyapunov exponent. The vibration characteristic mechanism corresponding to the evolution of the flow pattern is explored based on the time and frequency domain, and the origin exciting force of the elbow is explored according to the momentum balance equation. The simulation results show that the VOF method can well capture the characteristics of slug flow developed by the interphase instability mechanism. After phase space reconstruction, the dynamic evolution mechanism of the flow pattern is complex and the chaotic characteristics of slug flow are strong. The flow pattern evolution is related to the increase in wave height. The superficial velocity of the liquid phase is more sensitive to the flow pattern formation mechanism than the gas phas'e. The amplitude of the wave strongly depends on the Vsg and Vsl. There is a strong correlation between the main exciting force pulsation and momentum flux pulsation.

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来源期刊

Journal of Pressure Vessel Technology-Transactions of the Asme 工程技术-工程：机械

CiteScore

2.10

自引率

10.00%

发文量

审稿时长

4.2 months

期刊介绍： The Journal of Pressure Vessel Technology is the premier publication for the highest-quality research and interpretive reports on the design, analysis, materials, fabrication, construction, inspection, operation, and failure prevention of pressure vessels, piping, pipelines, power and heating boilers, heat exchangers, reaction vessels, pumps, valves, and other pressure and temperature-bearing components, as well as the nondestructive evaluation of critical components in mechanical engineering applications. Not only does the Journal cover all topics dealing with the design and analysis of pressure vessels, piping, and components, but it also contains discussions of their related codes and standards. Applicable pressure technology areas of interest include: Dynamic and seismic analysis; Equipment qualification; Fabrication; Welding processes and integrity; Operation of vessels and piping; Fatigue and fracture prediction; Finite and boundary element methods; Fluid-structure interaction; High pressure engineering; Elevated temperature analysis and design; Inelastic analysis; Life extension; Lifeline earthquake engineering; PVP materials and their property databases; NDE; safety and reliability; Verification and qualification of software.