The effect of laminar separation bubbles on the surface pressure distribution and aerodynamic force characteristics of a horizontal axis wind turbine airfoil is studied numerically. The NREL S809 airfoil for stall-controlled horizontal-axis wind turbines is analyzed at a chord Reynolds number of For all flow conditions involving laminar separation in the present study, bubble-induced vortex shedding is observed. This flow phenomenon causes significant oscillations in the airfoil surface pressures and, hence, in the airfoil-generated aerodynamic forces. The computed time-averaged pressures compare favorably with wind-tunnel measurements.
Bubble-Induced Unsteadiness on A Wind Turbine Airfoil
Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, March 2002; final revision, July 2002. Associate Editor: D. Berg.
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Mayda, E. A., and van Dam, C. P. (November 8, 2002). "Bubble-Induced Unsteadiness on A Wind Turbine Airfoil ." ASME. J. Sol. Energy Eng. November 2002; 124(4): 335–344. https://doi.org/10.1115/1.1510525
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