Effects of Froude, Reynolds, and Weber numbers on an air-entraining vortex
Effects of Froude, Reynolds, and Weber numbers on an air-entraining vortex
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DOI：
10.1080/00221686.2013.879541
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发表时间：
2014-05
影响因子：
2.3
通讯作者：
K. Taştan;N. Yıldırım
中科院分区：
文献类型：
--
作者：
K. Taştan;N. Yıldırım
本研究强调了在进水口结构处垂直涡临界淹没的缩尺模型中使用运动学和动力学相似性的必要性。结合已发表的实验数据，采用了基于流动连续性原理的半理论方法。本文的研究表明，只需要运动学相似就可以建立临界潜水深度与进水口直径之比的模型。对于进口流速与临界球面流速之比相同的进水口，无论水流和几何条件如何，临界沉没度与进水口直径之比都是相同的。新的发现是，只要CSSS的进气速度与进水口直径之比保持不变，就不需要动力相似来预测临界下沉与进水口直径之比。
The present study highlights the need for using both the kinematic and dynamic similarities in scaled models of the critical submergence of vertical vortices at intake structures. A semi-theoretical approach, which is based on the principle of flow continuity, is used in combination with published experimental data. The present study shows that only the kinematic similarity is needed to model the ratio of the critical submergence to the diameter of the intake. For intakes that have an identical ratio of the intake velocity to the velocity at the critical spherical sink surface (CSSS), the ratio of the critical submergence to the diameter of the intake is identical regardless of the flow and the geometrical conditions. The new finding is that dynamic similarity is not required for the prediction of the ratio of the critical submergence to the intake diameter, provided that the ratio of the intake velocity to the velocity at the CSSS is kept the same.