Characterisation of Mushroom Structures on Airfoils: CFD and Wind Tunnel Investigation

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Abstract

We presents the latest numerical and experimental findings on formation of such 3D flow structures over an NREL S826 airfoil at Reynolds numbers below 200,000. The spanwise flow is first detected by comparing polars measured using both surface pressure integration at one cross section as well as integral force gauge measurement, and the surface oil flow visualization technique is subsequently used to study the 3D flow topologies formed on the airfoil. Numerical simulations of
the same setup are also performed using the k-ω SST variant of unsteady Reynolds-Averaged Navier-Stokes (RANS) and the results are validated using wind tunnel experiments. CFD is shown to be able to accurately predict the lift and drag and
qualitatively observe stall cells similar to the experiments.
Original languageEnglish
Publication date2018
Number of pages4
Publication statusPublished - 2018
Event21st Australasian Fluid Mechanics Conference - University of Adelaide, Adelaide, Australia
Duration: 10 Dec 201813 Dec 2018

Conference

Conference21st Australasian Fluid Mechanics Conference
LocationUniversity of Adelaide
Country/TerritoryAustralia
CityAdelaide
Period10/12/201813/12/2018

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