Air Diffusion and Velocity Characteristics of Self-Aerated Developing Region in Flat Chute Flows

Self-aerated flows in flat chutes are encountered downstream of the bottom outlet, spillways with a small slope and storm waterways. In present study, development self-aeration chute flow is described new experiments performed long pressure outlet for different discharge rates. The distribution air concentration, time mean velocity fluctuation direction self-aerated developing region—where bubbles do not diffuse next to channel bottom—were measured analyzed. region from free surface was about 27.16% 51.85% water depth study. analysis results revealed that maximum distance bubble diffusion increased along direction. This indicates flow, process relatively long. Cross-section velocities region, this trend much more remarkable area near surface. fluctuations cross-sections flattened flow. Higher corresponded presence stronger turbulence, which enhanced