Air Entrainment and Pressure Fields over Stepped Spillway in Skimming Flow Regime

       The 6th Asia-Pacific Power and Energy Engineering Conference (APPEEC 2014)——This talk deals with some aspects of the air entrainment process along the chute of spillway and study of pressure fluctuations. The experimental study has been carried out using stepped spillway model located in the campus of Gov-ernment College of Engineering, Amravati (India). It is observed that air concentration is increases with discharge as well as with number of step. Air concentration is increases along the length of spillway. It is also observed that the bot-tom mean air concentration increases with step height in the upstream reach of stepped spillway, which is prone to ca-vitation. The pressure profiles exhibit a wavy pattern down the stepped chute and pressure on each step increases with ratio of critical depth to step height (yc/h).