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

Hamid Sarlak Chivaee; Jens Nørkær Sørensen

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 language	English
Publication date	2018
Number of pages	4
Publication status	Published - 2018
Event	21st Australasian Fluid Mechanics Conference - University of Adelaide, Adelaide, Australia Duration: 10 Dec 2018 → 13 Dec 2018

Conference

Conference	21st Australasian Fluid Mechanics Conference
Location	University of Adelaide
Country/Territory	Australia
City	Adelaide
Period	10/12/2018 → 13/12/2018

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title = "Characterisation of Mushroom Structures on Airfoils: CFD and Wind Tunnel Investigation",

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. ",

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year = "2018",

language = "English",

note = "21st Australasian Fluid Mechanics Conference ; Conference date: 10-12-2018 Through 13-12-2018",

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TY - CONF

T1 - Characterisation of Mushroom Structures on Airfoils: CFD and Wind Tunnel Investigation

AU - Sarlak Chivaee, Hamid

AU - Sørensen, Jens Nørkær

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

M3 - Paper

T2 - 21st Australasian Fluid Mechanics Conference

Y2 - 10 December 2018 through 13 December 2018

ER -

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

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