DocumentCode :
1942501
Title :
Experimental studies on velocity field around wind turbine rotor
Author :
Kamada, Yoichi ; Maeda, T.
Author_Institution :
Div. of Mech. Eng., Mie Univ., Tsu, Japan
fYear :
2011
fDate :
28-30 Sept. 2011
Firstpage :
1
Lastpage :
7
Abstract :
This paper describes the behavior of the flow field around rotor blades. A three-bladed upwind rotor was tested in a single return type wind tunnel. The rotor had a diameter of 2.4 m. The flow field around the rotor blades was measured using two-dimensional LDV. The three velocity components of flow field were measured in the x-y plane. The velocity vectors at optimum operation showed a smooth flow around the blade and the bound vortex around blade cross-section seemed persistent. On the other hand, the velocity vectors in stall condition demonstrated significant fluctuations in the near wake and separation on the blade suction side was observed. The circulation around a blade span-wise section was calculated at a certain control volume. From observations of the flow field and the calculated results of circulation, it seems that the flow is separated at the blade from the middle-span region to the tip region in stall condition. No separation was observed at the blade´s root region.
Keywords :
angular velocity; blades; fluctuations; rotors; wind power plants; wind tunnels; wind turbines; blade cross-section; blade root region; blade span-wise section; blade suction side; bound vortex; control volume; flow field components; middle-span region; rotor blades; single return type wind tunnel; stall condition; three-bladed upwind rotor; tip region; two-dimensional LDV; velocity field; velocity vectors; wind turbine rotor; x-y plane; Aerodynamics; LDA measurement; Velocity distribution; Wind energy;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Utility Exhibition on Power and Energy Systems: Issues & Prospects for Asia (ICUE), 2011 International Conference and
Conference_Location :
Pattaya City
Print_ISBN :
978-1-4673-6006-7
Type :
conf
DOI :
10.1109/ICUEPES.2011.6497744
Filename :
6497744
Link To Document :
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