Abstract Placing a diffuser around wind turbine can increase its power output, but not all mechanisms by which the alters aerodynamics have been investigated thoroughly. Here, we concentrate on one such mechanism: effect of finite number blades. In nearly blade element analyses turbines, effects are approximated Prandtl’s “tip loss factor” goes to zero at tip. We argue that this limiting behavi...

As tidal energy is progressively earning attention worldwide, there a lot of existing research about the current potency and turbine design. Especially on design, studies deduced that diffuser augmentation superior choice to increase performance. However, in finding best angle whose efficiency maximum, yet minim cavity risk still limited. Therefore, this study proposes an innovative, optimized ...

The effects of using a wind acceleration device (wind lens) with vertical-axis wind turbines in wind tunnel experiments were examined. A wind lens consists of a diffuser and flanges, and this study investigated the optimum parameters of their configuration with regard to the power augmentation of the turbines. The wind lens with a flat-panel-type diffuser demonstrated power augmentation by a fa...

Malaysia has a great potential to harness energy in water due its long coastline within the South China Sea and Straits of Malacca. Malaysia's mix could be improved using marine current devices (MCEDs) replace fossil fuel it is predictable compare hydropower, solar photovoltaic (PV), biomass. However, MCEDs not been fully developed Malaysia. The objectives this paper are provide useful backgrou...

Abstract. The impetus towards sustainable energy production and access has led to considerable research development on decentralized generators, in particular diffuser-augmented wind turbines. This paper aims characterize the performance of turbines (DAWTs) using high-lift airfoils employing a three-step computational analysis. study is based fluid dynamics, analysis carried out by solving unst...