Extensive Research and Development (R&D) within the tidal energy industry is pushing this sector towards commercial viability, with full scale prototypes starting to meet the challenges of the marine environment. This paper combines velocity data collected from Ramsey Sound (Pembrokeshire, Wales), with Computational Fluid Dynamics (CFD) to assess the impact of non-rectilinear flows on turbine r...

Typical wind turbine systems are sufficiently large so as to require extensive physical space for their installation and operation. These requirements preclude the use of turbines in crowded, urban environments. On the other hand, smaller turbine systems may find practical application as rooftop units, installed atop tall buildings. Such rooftop units must be much smaller than their ground-base...

The article presents the results of development proposals to increase safety margin blades and efficiency a single-stage axial flow turbine compressor small-sized turbo-shaft engine being modernized with use multidiscipline optimization methods. Analysis initial version showed that working is significantly lower than required by strength standards. To eliminate problem encountered task blade wa...

A new mechanism responsible for structural life consumption due to resonant fatigue in turbine blades, or vanes, is presented and explained. A rotating blade or vane in a gas turbine can change its contour due to erosion and/or material build up, in any of these instances, the surface pressure distribution occurring on the suction and pressure sides of blades-vanes can suffer substantial modifi...

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...

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...