A numerical performance analysis of a ducted, high-solidity tidal turbine in yawed flow conditions

Analysing the fluid dynamic performance of a bare rotor when succumb to yawed flow conditions has consistently presented diminishment in mechanical power conversion efficacy. Introducing duct along perimeter been acknowledged sustain performance, yet causation behind this phenomenon is uncertain. This study puts forward an investigation into hydrodynamic concerning true-scale, ducted, high-solidity tidal turbine free-stream flows by utilising blade-resolved, unsteady computational dynamics. Investigating within angular bearing range 0o 45o with axis, increases rotational and thrust are limited at distinct tip-speed ratio values. Through multiple yaw iterations, maximum attainment falls angle 23.2o, resulting increase 3.44% peak coefficient 0.35 nominal 2.00, together extension development higher ratios. In verification increase, outcomes analysed means linear momentum theory; area-averaged values static pressure acquired from annular radial surfaces fore aft rotor, analogous relationship blade-integrated attained. The analysis concludes that, ratios, drop across bearings, enhancing resultant axial force loading upon blades, hence providing further augmentation turbine.