Hypersonic laminar flow over a canonical 25°–55° double cone is studied using computational fluid dynamics and global stability analysis (GSA) with free-stream Mach number of 11.5 various unit Reynolds numbers. Axisymmetric simulations reveal that secondary separation occurs beneath the primary bubble beyond critical number. The numerical results agree well existing experiments triple-deck theo...

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: stream...