Numerical study on the flow-induced rotation coupled with vortex-induced vibration of a cylinder with Savonius impeller structure

被引：0

作者：

Liu, Xinhan ^{[1
]}

Lou, Min ^{[1
]}

Wang, Yu ^{[1
]}

Li, Xiang ^{[2
]}

机构：

[1] School of Petroleum Engineering, China University of Petroleum (East China), Qingdao

[2] Kunming Shipborne Equipment Research and Test Center, China Shipbuilding Industry Corporation, Kunming

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 10期

关键词：

ellipticity; flow-induced rotate; Savonius impeller; vortex-induced vibration;

D O I：

10.13465/j.cnki.jvs.2024.10.012

中图分类号：

学科分类号：

摘要：

A novel cylindrical energy conversion device with Savonius impeller structure was numerically simulated, incorporating user-defined functions and the SST k-a> turbulence model to achieve the analog of fluid-structure coupling. The flow rotation and vibration response of the cylinder with Savonius impeller structure of different ellipticities were investigated. The mechanism of coupling between flow rotation and vortex-induced vibration was revealed. The results show that the impeller structure ellipticity is the key to influence the transverse flow displacement of the cylinder. For cylinders with the same ellipticity, the projected area is an important factor affecting the downstream displacement. At low reduction velocities, the cylinder rotates unsteadily, forming an asymmetric flow wake, and showing a P + S wake pattern. At high reduction velocities, the cylinder rotates steadily in the clockwise direction, and the rotational angular velocity fluctuates periodically. In an identical rotation period, cylinders with smaller impeller structure ellipticities exhibit larger absolute values of the cylinder' s instantaneous torque coefficient. © 2024 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：98 / 105

页数：7

共 24 条

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