Numerical simulation on the flow around an oscillating twodimensinoal rectangular cylinder based on the immersed boundary method
YANG Qing1， CAO Shuyang2， ZHOU Junwen3
1. Changzhou Key Lab of Construction Engineering Structure and Material Properties, Changzhou Institute of Technology, Changzhou 213032, China;
2. State Key Laboratory of Disaster Reduction in Civil Engineering，Tongji University，Shanghai 20092，China
Abstract：The immersed boundary method (IBM) was adopted to compile a program to compute the moving boundary on a stable grid. The numerical simulation on the flow around a forced transversal sinusoidal oscillating rectangular cylinder (Re=UD/v=103, constant oscillating amplitude, side ratio B/D=1，3，5) was carried out to investigate the influence of side ratio on the aerodynamic characteristics of the cylinder. The results indicate that the length of lockin region changes with the varying of side ratio. When the side ratio B/D=3, the synchronization zone is classified into two stages. The fluid flow near the surface in the direction consisting with the direction of cylinder displacement is suppressed by the motion of rectangular cylinder, which is a common flow feature near border， in all the three side ratio cases. When the side ratio B/D=3~5, the curve characteristic of mean pressure distribution appears on the lateral surface of rectangular cylinder because of the flow reattachment. The negative surface pressure on the leading corner will become larger at high oscillating frequency. The mean drag coefficient in the three cases (B/D=1, 3, 5) all reaches its peak value near the natural vortex frequency under stable condition.
收稿日期: 2016-12-20
出版日期: 2018-07-15
引用本文:
杨青1，曹曙阳2，周军文3. 基于浸入边界算法的振动二维矩形柱绕流模拟研究[J]. 振动与冲击, 2018, 37(14): 254-261.
YANG Qing1， CAO Shuyang2， ZHOU Junwen3. Numerical simulation on the flow around an oscillating twodimensinoal rectangular cylinder based on the immersed boundary method. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(14): 254-261.
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