Experimental benchmark and code validation for airfoils equipped with passive vortex generators
D Baldacchino (TU Delft - Wind Energy)
Carlos Simao Simao Ferreira (TU Delft - Wind Energy)
Liesbeth Florentie (TU Delft - Aerodynamics, TU Delft - Education and Student Affairs)
Nando Timmer (TU Delft - Wind Energy)
A.H. van Zuijlen (TU Delft - Aerodynamics)
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Abstract
Experimental results and complimentary computations for airfoils with vortex generators are compared in this paper, as part of an e_ort within the AVATAR project to develop tools for wind turbine blade control devices. Measurements from two airfoils equipped with passive vortex generators, a 30% thick DU97W300 and an 18% thick NTUA T18 have been used for benchmarking several simulation tools. These tools span low-to-high complexity, ranging from engineering-level integral boundary layer tools to fully-resolved computational uid dynamics codes. Results indicate that with appropriate calibration, engineering-type tools can capture the e_ects of vortex generators and outperform more complex tools. Fully resolved CFD comes at a much higher computational cost and does not necessarily capture the increased lift due to the VGs. However, in lieu of the limited experimental data available for calibration, high _delity tools are still required for assessing the e_ect of vortex generators on airfoil performance.
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