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首页> 外文期刊>Australian journal of water resources >Analysis of scour characteristics in presence of aerated crossing jets
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Analysis of scour characteristics in presence of aerated crossing jets

机译：充气交叉口存在时的冲刷特性分析

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Jets scour is a major topic in hydraulic engineering. It has to be carefully analysed in order to understand the mechanism and predict its geometry. The jets configuration has a deep influence on the scour features. In the present paper the analysis was conducted in presence of two symmetric crossing jets, varying the discharge, the air content, the tailwater level in the downstream stilling basin, the angle between the jets and the vertical distance of the jets crossing point from the water surface, for different vertical jets angle. It was proven that the presence of the air in the jets deeply affects the scour morphology. The scour geometry was analysed and compared with the respective obtained in black water conditions. Useful practical relationships are proposed to estimate the main scour hole dimensions. The analysis was also extended to non-dimensional profiles and it was proved that the effect of air content on them is negligible.
机译：喷射冲刷是水利工程中的一个主要主题。必须仔细分析它，以了解其机理并预测其几何形状。射流的配置对冲刷性能有深远的影响。在本文中，分析是在存在两个对称的交叉喷口的情况下进行的，它们改变了排放量，空气含量，下游静水池中的尾水位，喷口之间的角度以及喷口与水交叉点的垂直距离表面，用于不同的垂直喷射角度。事实证明，射流中空气的存在会严重影响冲刷的形态。分析了冲刷的几何形状，并将其与在黑水条件下获得的冲刷几何形状进行了比较。提出了有用的实用关系来估计主冲孔尺寸。该分析还扩展到无量纲剖面，并且证明了空气含量对其的影响可以忽略不计。

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