基于流固耦合分析的轴流式止回阀的内部流动和振动特性

IF 2.3 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Guang Zhang, Run Hua Hu, De Sheng Chen, Zhe Lin
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引用次数: 0

摘要

轴流式止回阀主要用于调节管道内流体的单向流动,防止回流或逆流。这类止回阀的设计确保其在流体流动方向上开启,而在逆向流动时关闭,从而确保管道系统内的流体只能按预定方向流动。本文建立了轴流式止回阀的三维物理模型,其长度为 2050 毫米,高度为 2200 毫米,进出口直径为 1716 毫米。利用动态网格技术和用户自定义函数研究了不同压差下轴流式止回阀关闭过程中流场的动态特性。通过流体-结构耦合对轴流止回阀阀杆的振动进行了预测和分析。此外,还采用了流固耦合方法来预测和分析轴流式止回阀阀杆的振动。结果表明,随着进出口压差的增加,单向阀关闭所需的时间减少,导致阀瓣的速度加快。与此同时,流场对阀杆施加的流体力也会增加,从而产生更明显的振动。在这些振动中,前三种自然模式对阀杆的影响最大。为防止阀杆损坏,应努力将前三种模式对轴流式止回阀的影响降至最低。这项研究为在涉及轴流式止回阀的运行情况下防止阀杆损坏提供了宝贵的建议和支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Internal flow and vibration characteristics of axial flow check valves based on fluid-structure interaction analysis
Axial flow check valves are primarily employed to regulate the unidirectional flow of fluids within pipelines, preventing backflow or reverse flow. The design of this type of check valve ensures its opening in the direction of fluid flow and closing in the case of reverse flow, thereby ensuring that fluid within the pipeline system can only move in the predetermined direction. This paper establishes a three-dimensional physical model of the axial flow check valve with the length of 2050 mm, the height of 2200 mm and the inlet/outlet diameter of 1716 mm. Dynamic characteristics of the flow field during the closing process of axial flow check valve under different pressure difference were studied using dynamic mesh technology and User Defined Function. The vibration of the valve stem of the axial flow check valve was predicted and analyzed through fluid-structure coupling. Additionally, a fluid-structure coupled approach is employed to predict and analyze the vibration of the valve stem in axial flow check valves. The results indicate that with an increase in the pressure difference at the inlet and outlet, the time required for the check valve to close decreases, leading to an acceleration in the valve disc’s velocity. Simultaneously, the fluid forces exerted by the flow field on the valve stem the increase, resulting in more significant vibrations. Among these vibrations, the first three natural modes have the most substantial impact on the valve stem. To prevent damage to the valve stem, efforts should be made to minimize the influence of these first three modes on axial flow check valves. This study provides valuable recommendations and support for preventing damage to the valve stem in operational scenarios involving axial flow check valves.
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来源期刊
CiteScore
3.80
自引率
16.70%
发文量
370
审稿时长
6 months
期刊介绍: The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.
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