Tidal stream turbines operate in the harsh marine environment, subjected to turbulence, wave action and wakes from upstream devices when deployed arrays. Turbines may be mounted on sea bed or floating platforms. Numerical models are invaluable study individual array performance their interaction with environmental flows. To date, shallow water three-dimensional Reynolds averaged Navier–Stokes (...

Regions of positive slope in the pressure-discharge characteristics can result in a reduction or even lack of damping of system instabilities. They are therefore one of the major concerns in design and operation of centrifugal pumps as they are limiting the admissible operating range. The considered preliminary hydraulic design of an industrial double suction pump of medium specific speed ν = 0...

Tidal turbine blades experience a significant bending moment in the root area during their long-term operation sea water environment. This necessitates using fibre reinforced polymer as blade material to provide required strength/stiffness. In this study, design methodology based on hydrodynamic and Finite Element models with view examine mechanical properties of composites was developed evalua...

The performance benefits of deploying tidal turbines in close side-by-side proximity to exploit constructive interference effects are demonstrated experimentally using two 1.2 m diameter turbines. arrayed at 1/4 tip-to-tip spacing, and their compared with that a single rotor. Tests were completed the 25 diameter, 2 deep wave current FloWave Ocean Energy Research facility. A detailed assessment ...