Assessment of Blade Element Momentum Theory-based engineering models for wind turbine rotors under uniform steady inflow

Blade Element Momentum Theory (BEMT) -based approaches provide 15%–20% inaccurate load predictions under uniform steady inflow. Inaccuracies were related to unclear aerodynamic mechanisms causing the Prandtl Tip-Root Loss (TRL) correction to fail at high Tip-Speed Ratio (TSR) and the ambiguous drag coefficient treatment under Stall Delay (SD)...

An efficient blade sweep correction model for blade element momentum theory

<br/><br/>This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the changes in the induction system introduced by blade sweep. The proposed extension corrects the axial...

The Fluid Dynamic Basis for Actuator Disc and Rotor Theories: Revised Second Edition

The first rotor performance predictions were published by Joukowsky exactly 100 years ago. Although a century of research has expanded the knowledge of rotor aerodynamics enormously, and modern computer power and measurement techniques now enable detailed analyses that were previously out of reach, the concepts proposed by Froude, Betz,...

Design and Noise Study of a Low-Drag Wind Turbine for Airborne Power Applications: A Numerical and Experimental assesment

Experimental Study Of Flow Field Of An Aerofoil Shaped Diffuser With A Porous Screen Simulating The Rotor

This study presents an experimental investigation on a diffuser augmented wind turbine (DAWT). A screen mesh is used to simulate the energy extraction mechanisms of a wind turbine in experiment. Different screen porosities corresponding to different turbine loading coefficients are tested. Measurements of the axial force and of the velocity...

The effect of platform motions on turbine performance: A study on the hydrodynamics of marine current turbines on the floating tidal energy converter BlueTEC

Estimating the angle of attack from blade pressure measurements on the national renewable energy laboratory phase VI rotor using a free wake vortex model: Yawed conditions

Improving BEM-based Aerodynamic Models in Wind Turbine Design Codes