为研究不等直径双圆柱在风力振动发电领域的应用前景和能量俘获特征,该文在L/D=1.5条件下,对不等直径双圆柱流致振动响应和能量转换特性进行研究,其中上游圆柱固定,下游圆柱仅做横流向振动。研究结果表明：下游圆柱会呈现涡激振动与尾流驰振两种响应,且直径比对下游圆柱的振动响应、受力特性和锁定区范围都有影响。对于获能功率驰振响应为涡激振动的2倍,但对于能量转换效率在涡激振动区间可达约30%,但在驰振区间仅有10%。从分析结果来看,在低折合速度下,d/D=0.8时能量俘获优势较明显,但在高折合速度下,d/D=0.6时能量俘获优势更加显著。
Abstract
To investigate the application prospects and energy harvesting characteristics of two tandem cylinder with different diameter ratios in the field of wind vibration power generation,the vibration response and energy conversion characteristics of a two tandem cylinder system with different diameters are investigated under the condition of L/D=1.5, where the upstream cylinder is fixed and the downstream cylinder only vibrates in the transverse direction. The results indicate that the downstream cylinder exhibits both vortex-induced vibration and galloping vibration response, and the diameter ratio affects the vibration response and force characteristics of the downstream cylinder, which leads to the change of the lock-in velocity range. The galloping exhibits a harvesting power two times larger than the vortex-induced vibration. The energy conversion efficiency can be about 30% in the vortex-excited vibration region, but only 10% in galloping region. Based on these analysis results, the advantage of d/D=0.8 energy conservation is more notable at low reduced velocity, but at high reduced velocity, the advantage of d/D=0.6 energy conservation become more significant.
关键词
能量转换 /
计算流体力学 /
风能 /
流致振动 /
直径比 /
动力响应
Key words
energy conversion /
computational fluid dynamics /
wind energy /
flow-induced vibration /
diameter ratio /
dynamic response
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基金
河北省高校科学研究项目（QN2022144）
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