This paper presents an investigation of the aerodynamic influence rim seal purge flow injection on main in a 1.5-stage turbine with non-axisymmetric end walls and bowed stator using experimental measurements unsteady RANS simulations. The study focuses secondary vortex structures formed rotor passages axial rig. Through performance map measurements, it was found that efficiency gain configurati...

The effect of impeller type and shear rate on the evolution of floc size and structure during shear-induced flocculation of polystyrene particles with aluminum sulfate is investigated by image analysis. One radial flow (six-blade Rushton turbine) and two axial flow (three-blade fluid foil, four-blade 45° pitch) impeller configurations are examined. The steady state average floc size is show...

A brief review of the literature is provided on the characteristics of marine currents and the approaches used for simulating tidal turbines. The feasibility of using CFD models to simulate time-dependent turbulent flow around a tidal turbine is then explored. Two different approaches for specifying the structure of the turbulent inflow conditions in CFD models are compared: the von Kármán spec...

The paper presents the results of a stage development an analytical model for assessing impact various defects on operation axial-flow compressor. Some recommendations setting numerical models carrying out gas dynamic and strength analysis compressor stages blades with account are proposed. Verification was carried presented: also presented in paper. On basis verification some special aspects C...

An experimental study was conducted to investigate the dynamic wind loads acting on a wind turbine model sited in atmospheric boundary layer winds. The experimental studies are conducted in a large-scale Aerodynamic/Atmospheric Boundary Layer (AABL) Wind Tunnel available at Iowa State University. A three-blade Horizontal Axial Wind Turbine (HAWT) model was placed in atmospheric boundary layer w...

Internal combustion engine (ICE) exhaust gases provide a high amount of energy which is partially lost to the environment. Such can be recovered with turbocharger turbine or other after-treatment device. As flow varies not only load but also opening and closing valves, proper matching between should established maximize recovery waste energy. That why twin-scroll dual turbocharging system imple...

Compressor intercooling has traditionally been employed to reduce compressor work and augment gas turbine output power. Conventional intercooling schemes are usually applied through nonmixed heat exchangers between two compressor stages or by cooling the outside of the compressor casing. Any cooling schemes that may affect the flow field inside the compressors have not been favorably considered...