Experimental study on flow past a rotationally oscillating cylinder
Experimental study on flow past a rotationally oscillating cylinder
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旋转振荡圆柱体流过的实验研究
DOI：
10.1007/s13344-017-0056-8
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发表时间：
2012-11
影响因子：
1.6
通讯作者：
Tan Soon Keat
中科院分区：
文献类型：
--
作者：
Gao Yangyang;Yin Changshan;Yang Kang;Zhao Xizeng;Tan Soon Keat
A series of experiments was carried out to study the flow behaviour behind a rotationally oscillating cylinder at a low Reynolds number (Re=300) placed in a recirculation water channel. A stepper motor was used to rotate the cylinder clockwise- and- counterclockwise about its longitudinal axis at selected frequencies. The particle image velocimetry (PIV) technique was used to capture the flow field behind a rotationally oscillating cylinder. Instantaneous and timeaveraged flow fields such as the vorticity contours, streamline topologies and velocity distributions were analyzed. The effects of four rotation angle and frequency ratiosFr(Fr=fn/fv, the ratio of the forcing frequencyfnto the natural vortex shedding frequencyfv) on the wake in the lee of a rotationally oscillating cylinder were also examined. The significant wake modification was observed when the cylinder undergoes clockwise-and-counterclockwise motion with amplitude of π, especially in the range of 0.6≤Fr≤1.0.
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影响因子：
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通讯作者：
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影响因子：
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