Effect of 3D Shape of Pump-Turbine Runner Blade on Flow Characteristics in Turbine Mode

The effect of blade spatial profiling with the help tangential lean Francis pump-turbine runner heads up to 200 m on flow structure and energy characteristics was numerically investigated. A part model Dniester pumped storage plant adopted as original version. Two new systems were designed, which differed from version by mutual position cross-sections in direction: positive negative lean, while shape themselves remained unchanged. Modeling viscous incompressible calculation domain, contains one channel guide vane runner, for three variants parts, performed using IPMFlow software based numerical integration Reynolds equations an additional term containing artificial compressibility. To take into account turbulent effects, SST differential two-parameter turbulence Menter is applied. Numerical carried out implicit quasi-monotonic Godunov scheme second order accuracy space time. study models diameter 350 mm a wide range openings at reduced rotation frequencies corresponding minimal, design maximal station. comparison pressure fields velocity vectors runners, graphs blades, distribution components inlet draft tube, efficiency parts are presented. It concluded that domain RK5217M2 has best characteristics. An experimental runners hydrodynamic stand planned