The experimental results indicate that screens with a certain porosity placed vertically in the supercritical flow direction could dissipate a considerable amount of flow energy. Unlike the former studies which have been carried out in the fixed-bed flumes, this study investigates the energy dissipation through the screen in the movable bed at the downstream of the screen. The experiments have been carried out by the screens with 40% and 50% porosities, single and double arrangements of screens and three different bed particle sizes. The supercritical Froude number varied in the range of 5–18. According to the results, double screens with 40% porosity have the highest energy dissipation. Also, the single screens with 50% porosity have the minimum bed scour for a constant amount of energy dissipation. The theoretical multivariate equations were derived based on dimensional analysis, and the related coefficients were obtained by using experimental results.

中文翻译：

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活动床渠道中屏风消能器的实验研究

实验结果表明，在超临界流动方向上垂直放置具有一定孔隙度的筛网可以耗散大量的流动能量。与之前在固定床水槽中进行的研究不同，本研究调查了通过筛网下游活动床中筛网的能量耗散。实验是通过具有 40% 和 50% 孔隙率的筛网、单排和双排筛网以及三种不同的床粒度来进行的。超临界弗劳德数在 5-18 的范围内变化。根据结果​​，具有 40% 孔隙率的双屏具有最高的能量耗散。此外，具有 50% 孔隙率的单个筛网具有最小的床冲刷量，以实现恒定的能量耗散量。