哈尔滨工程大学学报2018，Vol.39Issue(2)：247-253,7.DOI:10.11990/jheu.201610018
低雷诺数下串列双圆柱涡激振动的数值模拟
Numerical study of flow-induced vibration of tandem circular cylinders at low Reynolds number
摘要
Abstract
In this paper, a finite difference method based on an in-house code, CIP-ZJU, is utilized to simulate two-dimensional flow past tandem circular cylinders at a low Reynolds Number(Re=150). The model is built on a Cartesian coordinate system,and the Navier-Stokes equation is solved using a CIP method,which has a three-order accuracy. The fluid-structure interactions are treated using an immersed boundary method, and different reduced velocity and spacing ratios are studied. The cylinders can vibrate only in a transverse direction, and the upstream cylinder is considered in two conditions:fixed or with elastically mounted vibration. The force on the cylinders,dy-namic response of the cylinders,and the vortex field are analyzed,and results show that the current model can ef-fectively predict VIV. It is found that the maximum vibration amplitudes of the upper cylinder and tandem circular cylinders are much larger than that of a single cylinder,while the drag force of the tandem circular cylinder is gen-erally smaller than that of a single cylinder. When the upper cylinder is fixed,the vibration frequency of the down-stream cylinder is not dominated by the Strouhal number, but the situation differs when the upper cylinder moves freely. At a reduced velocity of 4≤Ur≤5, the movement range of the downstream cylinder is limited within two vortexes shed from the upstream cylinder,which restrains vibration of the downstream volume.关键词
串列双圆柱/CIP方法/涡激振动/N-S方程/浸入边界法/数值模拟/雷诺数/涡旋脱落Key words
tandem cylinders/CIP method/flow induced vibration/N-S equation/immersed boundary method/numerical simulation/Reynolds number/vortex shedding柱形结构物的涡激振动(或涡激振动)是一种分类
数理科学引用本文复制引用
张大可,赵西增,胡子俊,王凯鹏..低雷诺数下串列双圆柱涡激振动的数值模拟[J].哈尔滨工程大学学报,2018,39(2):247-253,7.基金项目
国家自然科学基金项目(51479175,51679212) （51479175,51679212）
浙江省杰出青年基金项目(LR16E090002). （LR16E090002）
