OPTIMIZED CURVATURE INTERIOR PROFILE FOR DIFFUSER AUGMENTED WIND TURBINE (DAWT) TO INCREASE ITS ENERGY-CONVERSION PERFORMANCE

Abstract

Suitable techniques to convert wind availability as a
kind of renewable energy source in Indonesia (which are
mostly in the low-speed regimes) need to be scrutinized
to achieve effective and efficient conversion. The
Diffuser-Augmented Wind Turbine (DAWT) concept
offers the possibility to cope with such the unfavourable
situation. In this paper we describe efforts to step-up
potential power- augmentation offered by the DAWT.
Modification of internal profile of the diffuser (based on
Ohya’s configuration without a flange) is done by adding
an optimized airfoil-shape as interior profile of the
diffuser. Additional velocity augmentation of 65.5% can
be achieved in comparison to the one with the original
flat-interior.