Strong interactions between free-surface aeration and turbulence in an open channel flow

摘要

High-velocity free-surface flows may be characterised by strong free-surface aeration. In turn the entrained air bubbles are expected to interact with the flow, turbulence. An experimental study was conducted in supercritical open channel flows down a cascade. Measurements included time-averaged air-water flow properties, air and water chord sizes, and interfacial areas. High levels of turbulence were associated consistently with large air-water interfacial areas, Altogether the study contributes to a better understanding of the basic interfacial processes in re-aeration cascades. (C) 2003 Elsevier Science Inc. All rights reserved. [References: 22]