Air-water flow measurements in a flat slope pooled stepped waterway

作者：Felder S; Chanson H^*

来源：Canadian Journal of Civil Engineering, 2013, 40(4): 361-372.

DOI：10.1139/cjce-2012-0464

• air-water flows
• turbulence
• stepped spillways
• pooled steps
• flow instabilities
• physical modelling
• turbulent energy dissipation

Air-water flows on stepped spillways were investigated experimentally in the last decades with a focus on steep slope chutes equipped with flat horizontal steps. Detailed air-water flow properties were recorded herein with three stepped geometries down a slope of theta = 8.9 degrees with: flat horizontal steps, pooled steps, and a combination of flat and pooled steps. The data included the distributions of basic air-water flow properties, as well as the energy dissipation and flow resistance data deduced from the air-water flow measurements. The results on the flat slope showed that the pooled stepped design enabled a greater rate of energy dissipation, but the pooled stepped geometries were affected by some flow instabilities and unsteady flow processes for a range of flow rates.

• 出版日期2013-4