Numerical and Experimental Study on the Opening Angle of the Double-Stage Flap Valves in Pumping Stations

Double-stage flap valves are widely used in new pumping stations. The different opening angles of the double-stage have a great influence on outflow. To gain insight into this phenomenon, four commonly operating conditions with were selected to perform three-dimensional simulation calculations and physical model studies flow pattern water behind at rates. is analyzed by three indicators: streamline flow, uniformity velocity, head loss culvert. result shows that coefficient resistance along way outlet culvert has negative correlation angle. larger angle valve, less culvert, gradually becomes better.