... to provide a suitable foundation design with high safety. With consideration of the wind turbine size and water depth, the monopile foundation design by the National Renewable Energy Laboratory (NREL) is selected in the current study. Both aerodynamic loading for the 5 MW wind turbine rotor defined by NREL...

...Jonathan M. Edwards; Louis Angelo Danao; Robert J. Howell Through novel experimental and computational methods, this paper details a study into the performance aerodynamics of a small-scale vertical axis wind turbine (VAWT). A novel experimental method is first developed and validated before...

... aerodynamic probe technology with miniaturized hardware and software for UAVs that enable autonomous UAV operation. The measurements, made to support the development of advanced wind simulation tools, are made in the near-wake (0.5D–3D, where D is rotor diameter) region of a 2 MW wind turbine that is located...

... are mainly dictated by the aerodynamic drag of the blades, whereas the losses at low tip speed ratios are dominated by stall effects. The changes in the rotor blade geometry due to the ice shapes will alter the aerodynamic drag and therefore alter the performance of the rotor at high tip speed ratios...

... to a tether that transmits the generated aerodynamic forces on the kite to a power conversion system on the ground. The ground-based power conversion system consists of a rocking arm coupled to a Sprag clutch, flywheel, and electrical generator. Governing equations describing the dynamical motion of the kite...

... in one case but poor in two other cases. Nevertheless, the model reproduces the main tendencies observed in the measurements with respect to varying flow conditions. Second, the model is implemented into an airfoil design code that is originally used for aerodynamic optimization. An existing wind turbine...

... a limited maximum lift and relatively low sensitivity to leading-edge roughness. As a result, these airfoils have quite different leading-edge profiles from airfoils applied to helicopter blades, and thus, quite different dynamic-stall characteristics. Unfortunately for wind turbine aerodynamics...

..., “Unsteady Aerodynamics Experiment Phase, VI: Wind Tunnel Test Configurations and Available Data Campaigns,” NREL, Technical Report No. TP-500-29955 ) wind-tunnel campaign at 7 m/s, 10 m/s, and 20 m/s freestreams for a nonyawed isolated rotor. Comparisons are shown for the surface pressure distributions...

... carried out by the Swedish Aeronautical Research Institute, former FFA, and by the American National Renewable Energy Laboratories (NREL) during the Unsteady Aerodynamic Experiment. The spans of the blades were 2.375 m and 5 m , the STORK 5 WPX and the NREL Phase VI blade, respectively. Five span...

.... In the measurements, the power curve and pressure distributions are measured for different azimuth angles. By increasing yaw angle, the maximum value of power coefficient of the rotor decreases. The sign of the yaw angle does not have any effect on power performance. The aerodynamic forces are discussed using...

...W. Sheng; R. A. McD. Galbraith; F. N. Coton The Leishman–Beddoes dynamic stall model is a popular model that has been widely applied in both helicopter and wind turbine aerodynamics. This model has been specially refined and tuned for helicopter applications, where the Mach number is usually above...

...Spyros G. Voutsinas 03 07 2008 aerodynamics condition monitoring reliability wind power wind turbines This special issue on Wind Energy contains a collection of contributions covering a variety of topics providing an indication on the research and development trends wind...

...Wouter Haans; Gijs van Kuik; Gerard van Bussel To reduce the level of uncertainty associated with current rotor aerodynamics codes, improved understanding of rotor aerodynamics is required. Wind tunnel measurements on model rotors contribute to advancing our knowledge on rotor aerodynamics...

...Alvaro Gonzalez; Xabier Munduate This work undertakes an aerodynamic analysis over the parked and the rotating NREL Phase VI wind turbine blade. The experimental sequences from NASA Ames wind tunnel selected for this study respond to the parked blade and the rotating configuration, both...

...Hugh D. Currin; Frank N. Coton; Byard Wood A new aerodynamic wake model has been developed for horizontal axis wind turbines. The aim is to develop an engineering tool for investigation and design of furling turbines. The prescribed vortex wake code HAWTDAWG , developed at the University of Glasgow...

... numerical predictions obtained with two different computational aerodynamics methods. Computations at bounded and unbounded conditions are used to quantify the wind tunnel wall corrections for the wind tunnel tests. 31 01 2006 19 07 2006 wind tunnels wind turbines aerodynamics drag...

...Sven Schmitz; Jean-Jacques Chattot This paper addresses three-dimensional effects which are pertinent to wind turbine aerodynamics. Two computational models were applied to the National Renewable Energy Laboratory Phase VI Rotor under rotating and parked conditions, a vortex line method using...

...Chanin Tongchitpakdee; Sarun Benjanirat; Lakshmi N. Sankar The aerodynamic performance of a wind turbine rotor equipped with circulation enhancement technology (trailing-edge blowing or Gurney flaps) is investigated using a three-dimensional unsteady viscous flow analysis. The National Renewable...

... show that the aerodynamic pitching moment impacts the blade torsion more than the inertial forces. Corbus , D. , and Prascher , D. , 2005 , “ Analysis and Comparison of Test Results from the Small Wind Research Turbine Test Project ,” Collection of the 2005 ASME Wind Energy Symposium...

... the ramp-up and oscillatory tests. 10 08 2005 21 11 2005 aerodynamics flow instability wind turbines unsteady aerodynamics dynamic stall onset of dynamic stall Dynamic stall is a term used to describe the stalling of an aerofoil, or lifting surface, during unsteady flow...