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Enhancement of Free Vortex Filament Method for Aerodynamic Loads on Rotor Blades

Hamidreza Abedi (Institutionen för tillämpad mekanik, Strömningslära ; Svenskt VindkraftsTekniskt Centrum (SWPTC)) ; Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära ; Svenskt VindkraftsTekniskt Centrum (SWPTC)) ; Spyros Voutsinas
ASME 2014 International Mechanical Engineering Congress & Exposition, Montreal, Canada Vol. 6B (2014),
[Konferensbidrag, refereegranskat]

The aerodynamics of a wind turbine is governed by the flow around the rotor, where the prediction of air loads on rotor blades in different operational conditions and its relation to rotor structural dynamics is one of the most important challenges in wind turbine rotor blade design. Because of the unsteady flow field around wind turbine blades, prediction of aerodynamic loads with high level of accuracy is difficult and increases the uncertainty of load calculations. A free vortex wake method, based on the potential, inviscid and irrotational flow, is developed to study the aerodynamic loads. Since it is based on the potential, inviscid and irrotational flow, it cannot be used to predict viscous phenomena such as drag and boundary layer separation. Therefore it must be coupled to the tabulated airfoil data to take the viscosity effects into account. The results are compared with the Blade Element Momentum (BEM) method and the GENUVP code.

Nyckelord: wind turbine aerodynamics, vortex filament, lifting surface, dynamic stall, free wake, aerodynamic loads, potential flow



Denna post skapades 2014-09-15. Senast ändrad 2016-08-23.
CPL Pubid: 202743

 

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