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首页> 外文期刊>International Journal of Offshore and Polar Engineering >Experimental Investigation Into the Flow Around a Stationary and Yawed Cylinder Under Asymmetrical End Conditions
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Experimental Investigation Into the Flow Around a Stationary and Yawed Cylinder Under Asymmetrical End Conditions

机译：不对称端部条件下固定偏航缸周围流动的实验研究

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摘要

Experiments with stationary and yawed cylinders were carried out at a recirculating water channel facility and aimed to study the effects of the inclination in the force coefficients and in the vortex-shedding frequency. The cylinders were inclined at 0 (non-yawed case), 10, 20, 30, and 45 degrees. Force coefficients and the Strouhal number were evaluated by using the Independence Principle (IP), which states a dependence of the flow characteristics only on the component of velocity normal to the cylinder axis. The experimental results showed that when the cylinder was yawed at 45 degrees, there was no regular vortex-shedding regime. A new result is the fact that the lift force spectra, as well as the mean drag coefficient, are different if the cylinder is yawed in upstream or downstream orientation. This difference is associated with the asymmetrical end conditions of the cylinder.
机译：在循环水通道设备上进行了固定缸和偏航缸的实验，目的是研究倾斜对力系数和涡流脱落频率的影响。圆柱体以0（非偏航情况），10、20、30和45度倾斜。力系数和Strouhal数通过使用独立原理（IP）进行评估，该原理规定了流动特性仅依赖于垂直于圆柱轴的速度分量。实验结果表明，当圆柱体以45度偏航时，没有规则的涡流脱落机制。一个新的结果是，如果气缸在上游或下游方向偏航，则升力谱以及平均阻力系数都不同。这种差异与气缸的不对称最终条件有关。

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