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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Modification of the modal characteristics of a square cylinder wake obstructed by a multi-scale array of obstacles
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Modification of the modal characteristics of a square cylinder wake obstructed by a multi-scale array of obstacles

机译:多尺度障碍物阻塞的方圆柱醒来的模态特性的修改

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Highlights?An experiment was undertaken to investigate the wake of square cylinder confined by smaller multi-scale cylinders.?A Proper Orthogonal Decomposition (POD) was undertaken on the experimental data.?The POD shows that when confined the turbulent length scales associated to the cylinder are modified.?The POD also shows rearranging the surrounding multi-scale cylinders changes the turbulent properties of the wake.AbstractAn experimental study was undertaken to investigate the changes on the turbulent wake of a confined square cylinder, caused by the introduction of three multi-scale arrays of obstacles. The arrays were introduced upstream, downstream and around the square cylinder, using the same obstacles in all cases. The results show that changes on the confinement caused by the introduced elements produce an increase of the shedding frequencies and on the energy contribution of the leading modes obtained b
机译:<![cdata [ 亮点 进行了一个实验,以研究由较小的多尺寸圆柱体限制的方形气缸唤醒。 在实验数据上进行了适当的正交分解(POD)。 POD显示,当局限于修改与汽缸相关联的湍流长度。 POD还显示重新排列周围的多尺度滚筒改变唤醒的湍流属性。 抽象< / ce:章节标题> 进行实验研究以调查变化在狭窄方圆柱的湍流之后,引进了三个多尺度障碍物阵列引起的。阵列在方形圆筒上游,下游和围绕方圆柱,在所有情况下使用相同的障碍物。结果表明,引入的元件引起的限制的变化会产生脱落频率的增加,并且在获得的前导模式的能量贡献上

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