Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine

In order to study the influence of change guide vane airfoil on flow characteristics in draft tube a reversible hydraulic turbine, turbine was used as object study, and effect pattern, energy loss, pressure pulsation area studied based SST k-ω turbulence model. The results show that under low conditions, modified movable directly affects direction speed water entering tube, reduces density vortex area, impact near wall during rotation belt, improves stability unit operation. turbulent comparison graph shows loss bent elbow section diffusion is reduced, return coefficient improved by calculating recovery level different operating conditions. A comparative analysis before after modification combination with development belt effectively vibration intensity stable operation threshold unit.