Experimental investigation on the performance of a double-cylinder flow-induced vibration (FIV) energy converter
Experimental investigation on the performance of a double-cylinder flow-induced vibration (FIV) energy converter
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DOI：
10.1016/j.renene.2018.11.022
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发表时间：
2019-04
期刊：
影响因子：
8.7
通讯作者：
H. Arionfard;Y. Nishi
中科院分区：
文献类型：
--
作者：
H. Arionfard;Y. Nishi
本文对双圆柱流致振动（FIV）能量转换器的性能进行了实验研究。其主要目的是利用拖曳力和间隙流来增强振动。气缸可围绕枢轴自由旋转，并位于不同的配置中，包括两个气缸在下游，两个气缸在上游，每侧一个气缸和一个气缸在枢轴上。每种配置由两个气缸之间的差距比（G=间隙/气缸直径）和重心比（CG=重心/气缸直径）表示。将气缸定位在不同的位置可以激活各种振动机制，包括：涡激（VE），尾流诱导振动（WIV），驰振和间隙切换诱导振动（GSIV）。最有效的振动机制是：（1）GSIV（C G = 0和G= 0.9）（2）VE（C G= 0和G≥ 3.9）（3）阻力辅助振动（其中一个气缸位于枢轴点上，另一个位于上游侧），（4）WIV（其中一个气缸位于枢轴点上，另一个位于下游侧），（4）两个气缸均位于下游侧且无间隙，（5）两个气缸均位于上游侧且无间隙。
In this study, the performance of a double cylinder flow-induced vibration (FIV) energy converter is experimentally investigated. The central aim is to take advantage of drag force and gap flow to enhance the vibration. The cylinders are free to rotate around a pivot and located in different configurations including both cylinders on the downstream, both on the upstream, a cylinder on each side and one cylinder on the pivot. Each configuration is represented by the gap ratio between the two cylinder (G= gap/cylinder diameter) and center of gravity ratio (CG= gravity center/cylinder diameter). Locating the cylinders in different positions made it possible to activate a wide range of vibration mechanisms including: Vortex excitation (VE), wake–induced vibration (WIV), galloping and gap–switching–induced vibration (GSIV). The most efficient vibration mechanisms are:(1) GSIV for C G= 0 and G= 0.9 (2) VE where C G= 0 and G≥ 3.9 (3) drag–assisted vibration where one cylinder is on the pivot point and another one on the upstream side,(4) WIV where one cylinder is on the pivot point and another one on the downstream side,(4) both cylinders on the downstream side with no gap and (5) both cylinders on the upstream side with no gap.