SST model with flow transition for the forced vibration of a three-dimensional circular cylinder

被引：0
|
作者：
Zhu Y. [1 ]
Zong Z. [2 ,3 ,4 ]
Jin G. [2 ]
机构：
[1] Marine Design and Research Institute of China, Shanghai
[2] School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian
[3] Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration, Shanghai
[4] State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 01期
关键词：
amplitude ratio; computational fluid dynamics; deep-sea riser; flow around a cylinder; forced oscillation; lift coefficient; shedding patterns;
D O I：
10.11990/jheu.202105077
中图分类号：
学科分类号：
摘要：
To study the relationship between the lift coefficient characteristics of a riser structure and the wake shedding mode under forced vibration, the SST model based on the two-equation transition is used to calculate the forced vibration of a rigid three-dimensional (3D) cylinder under a typical subcritical Reynolds number (Re = 105). The model uses the overlapping mesh technology and the single-degree-of-freedom motion equation to simulate the cylindrical motion and two-equation transition model to improve the accuracy of numerical calculation. The influence of the amplitude ratio of the lateral forced vibration and the frequency of dimensionless vibration on the load characteristics of the cylinder fluid is studied, and the correlation between the lift coefficient and the wake shedding mode is analyzed. The results demonstrate that the jump drop of the fluctuating lift coefficient in the 3D case is delayed compared with that of the two-dimensional (2D) one. There are a few differences between 3D and 2D situations. The lift does not exhibit the attenuation phenomenon commonly observed in the usual “2P” mode due to the influence of the distribution of the 3D axial vortex. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：23 / 31
页数：8
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