基于计算流体力学和计算结构动力学方法，对气液两相流诱导水平U型管振动进行数值仿真研究。对比分析气液两相流典型流型，重点研究了段塞流工况下流体动态激励特性和管道振动响应特性。结果表明：段塞流是振动最强烈的流型；在气相折算速度不变的情况下，随着液相折算速度的增大，段塞速度和段塞频率增大，段塞长度减小；水平U型管两弯头的振动响应基本对称；段塞频率、流体激励力、管道模态以及振动响应之间相互关联。本研究可为气液两相流流固耦合振动数值仿真提供参考。
Based on computational fluid dynamics (CFD) and computational structural dynamics (CSD), the vibration of horizontal U-tube induced by gas-liquid two-phase flow was numerically simulated. The typical flow patterns of gas-liquid two-phase flow were analyzed, and the fluid dynamic excitation characteristics and pipeline vibration response characteristics under slug flow condition were emphatically studied. The results show that slug flow is the flow pattern with the strongest vibration. The slug velocity and frequency increase and the slug length decreases with the superficial water velocity when the superficial gas velocity is constant. The slug frequency, fluid excitation force, pipe mode and vibration response are interrelated. This study can provide reference for numerical simulation of fluid solid coupling vibration of gas-liquid two-phase flow.
2023,45(21): 54-59 收稿日期：2022-10-3
DOI：10.3404/j.issn.1672-7649.2023.21.010
分类号：U661.44
基金项目：国家自然科学基金资助项目（51779143）；上海交通大学深蓝计划（SL2020ZD201）
作者简介：李琳依（1998-），女，硕士研究生，研究方向为船体结构强度与振动、流固耦合
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