均匀流场中串列阶梯圆柱流致振动实验研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (14) : 278-286.

论文

均匀流场中串列阶梯圆柱流致振动实验研究

及春宁1，张妍1，殷彤1，赵亚伟1，袁德奎2，许栋1

作者信息 +

Experimental study on the flow-induced vibration of two tandem stepped cylinders in uniform flow

JI Chunning1, ZHANG Yan1, YIN Tong1, ZHAO Yawei1, YUAN Dekui2, XU Dong1

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文章历史 +

摘要

采用实验方法研究了均匀流场中雷诺数570～5000范围内串列阶梯圆柱的流致振动现象，阶梯圆柱的覆盖率为R=50%，直径比为D/d=1.5。实验过程中，上游圆柱固定，下游圆柱可沿横流向自由振动。考虑了s/D*=2、4、8、16四种间距比和上、下游阶梯圆柱同相布置和反相布置两种情况。结果表明：间距比对于串列阶梯圆柱间的相互作用有着明显的影响，间距比的变化会改变柱间流动模式，导致下游圆柱的振动特性发生改变。对于反相布置的情况，在小间隙比和高折合流速的条件下，下游阶梯圆柱发生尾流驰振，振幅随着折合流速的增加而显著增加。而当间距比s/D* ≥ 8后，外形相位的影响则可以忽略。

Abstract

Flow-induced vibration of two tandem stepped cylinders in uniform flow is investigated experimentally in the range of Reynolds number from 570 to 5000, with the coverage ratio of the stepped cylinders being R=50% and the spacing ratio being D/d =1.5. In the experiments, the upstream cylinder is fixed and the downstream cylinder vibrates freely in the cross-flow direction. Four spacing ratios of s/D* = 2, 4, 8 and 16 are investigated with the in-phase and out-of-phase arrangements of the upstream and downstream cylinders being considered. The results show that the spacing ratio has a significant effect on the interaction between the tandem stepped cylinders, and a change in spacing ratio alters the gap flow pattern between the cylinder which leads to the different vibration characteristics of the downstream cylinder. For the out-of-phase arrangement of the tandem cylinders, the downstream cylinder undergoes wake-induced vibration when the spacing ratio is small and the reduced velocity is high. That is, the amplitude increases significantly with the increasing reduced velocity. However, when the spacing ratio s/D* ≥ 8, the influence of the geometry shape phase is negligible.

导出引用

及春宁1，张妍1，殷彤1，赵亚伟1，袁德奎2，许栋1. 均匀流场中串列阶梯圆柱流致振动实验研究[J]. 振动与冲击, 2023, 42(14): 278-286

JI Chunning1, ZHANG Yan1, YIN Tong1, ZHAO Yawei1, YUAN Dekui2, XU Dong1. Experimental study on the flow-induced vibration of two tandem stepped cylinders in uniform flow[J]. Journal of Vibration and Shock, 2023, 42(14): 278-286

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