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呼和敖德, 孟向阳. 横向振动方柱波动升力实验研究[J]. 力学学报, 1991, 23(5): 525-532. DOI: 10.6052/0459-1879-1991-5-1995-872
引用本文: 呼和敖德, 孟向阳. 横向振动方柱波动升力实验研究[J]. 力学学报, 1991, 23(5): 525-532. DOI: 10.6052/0459-1879-1991-5-1995-872
AN EXPERIMENTAL STUDY OF FLUCTUATING LIFT ON A SQUARE-SECTION CYLINDER OSCILLATING TRANS-VERSELY IN A UNIFORM STREAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 1991, 23(5): 525-532. DOI: 10.6052/0459-1879-1991-5-1995-872
Citation: AN EXPERIMENTAL STUDY OF FLUCTUATING LIFT ON A SQUARE-SECTION CYLINDER OSCILLATING TRANS-VERSELY IN A UNIFORM STREAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 1991, 23(5): 525-532. DOI: 10.6052/0459-1879-1991-5-1995-872

横向振动方柱波动升力实验研究

AN EXPERIMENTAL STUDY OF FLUCTUATING LIFT ON A SQUARE-SECTION CYLINDER OSCILLATING TRANS-VERSELY IN A UNIFORM STREAM

  • 摘要: 本文对均匀流中静止方柱和横向强迫振动的方柱进行了实验研究。实验雷诺数范围为 3×10~3~10~4,振幅与柱截面宽度之比 A/D 达到0.7,实验折合速度范围为 4.5≤V_r≤12。文章重点研究了较高振幅振动柱的锁定现象、波动升力与柱位移之间的相位变化,讨论了方柱涡激振荡、驰振和气动稳定性问题。对流场进行的流动显示,清晰地显示出锁定区涡脱落过程、近尾迹流场随振动频率和振幅的演化规律,从而对振动柱波动升力与相位变化的物理机制获得进一步认识。

     

    Abstract: Experiments on a square-sertion cylinder fixed and forced to oscillate transversely in uniform stream were conducted in a water tank. The Reynolds number of the experiments is in the range 3·103 to 104, the amplitude to side length ratio A/D is up to 0.7 and the range of reduced velocity 4.5≤Vt≤12.This study aims at investigating the lock-in phenomenon, fluctuating lift and the phase shift between fluctuating lift and displacement of the oscillating cylinder. The problems on the aeroelastic instability rela...

     

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