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Smart control of a horizontal axis wind turbine using dielectric barrier discharge plasma actuators |
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| Affiliation: | 1. Universidad de los Andes, Department of Mechanical Engineering, Cra 1 Este N_19A-40, Bogotá, D.C., Colombia;2. Universidad Autónoma de Occidente, Department of Mechanical Engineering, PAI+, Calle 25 N_115-85, Cali, Colombia;1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China;2. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer of Power Engineering, Shanghai, 200093, China;3. Aerospace Engineering Department, University of Kansas, Lawrence, KS, 66045-7621, USA;1. DUWIND, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629HS, Delft, the Netherlands;2. School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, China;3. ECN, Westerduinweg 3, 1755 LE Petten, the Netherlands |
| Abstract: | Rotating stall around a small-scale horizontal axis wind turbine was experimentally studied to characterize and assess smart rotor control by plasma actuators. Phase-locked Particle Image Velocimetry was used to map the flow over the rotor blade suction surface at numerous radial stations at a range of tip-speed-ratios. Flow separation occurred from the inboard of the blade and spread radially outwards as the tip-speed-ratio reduced. Plasma actuators placed along the span that produced a chord-wise body force had very little effect on the flow separation, even when operated in pulsed forcing mode. In contrast, plasma actuators along the blade chord that produced a body force into the radial directions (plasma vortex generators) successfully mitigated rotating stall. Torque due to aerodynamic drag was reduced by up to 22% at the lowest tip-speed-ratio of 3.7, suppressing stall over the outboard 50% of the blade. This was due to quasi-two-dimensional flow reattachment in the outboard region, and shifting of a fully stalled zone towards the hub in the inboard region because the plasma-induced body force counteracted the Coriolis-induced radial flow. This can significantly increase the turbine power output in unfavourable wind conditions and during start-up. |
| Keywords: | Horizontal axis wind turbine Smart rotor control Flow control Dielectric barrier discharge Plasma actuator Vortex generator CF"} {"#name":"keyword" "$":{"id":"kwrd0045"} "$$":[{"#name":"text" "_":"co-flow DBD"} {"#name":"keyword" "$":{"id":"kwrd0055"} "$$":[{"#name":"text" "_":"dielectric barrier discharge EHD"} {"#name":"keyword" "$":{"id":"kwrd0065"} "$$":[{"#name":"text" "_":"electrohydrodynamic HAWT"} {"#name":"keyword" "$":{"id":"kwrd0075"} "$$":[{"#name":"text" "_":"horizontal axis wind turbine LE"} {"#name":"keyword" "$":{"id":"kwrd0085"} "$$":[{"#name":"text" "_":"leading edge TE"} {"#name":"keyword" "$":{"id":"kwrd0095"} "$$":[{"#name":"text" "_":"trailing edge VG"} {"#name":"keyword" "$":{"id":"kwrd0105"} "$$":[{"#name":"text" "_":"vortex generator |
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