Large eddy simulation of the low frequency flow oscillation over NACA0012 aerofoil

E. M. ElJack, I. M. AlQadi, J. H. AlMutairi, J. Soria

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Abstract

This study examines the effect of angle of attack of an aerofoil on the low-frequency flow oscillation near stall conditions. Large eddy simulations are performed for a NACA0012 aerofoil at Reynolds number of 5 × 104 and Mach number of 0.4. The simulations are carried-out at angles of attack ranging from 9.0° to 10.1° with increment of 0.1°, in addition to the angles of attack 8.5°, 8.8°, 9.25°, and 10.5°. Time histories of aerodynamic coefficients show large oscillations due to a switching between attached and separated flow around the aerofoil. This is indicative that the low-frequency oscillation phenomenon is captured. Low frequency flow oscillation is sustained and more pronounced at the angles of attack of 9.8°, 9.9°, and 10.0°

Original languageEnglish
Title of host publicationProceedings of the 20th Australasian Fluid Mechanics Conference (AFMC)
PublisherAustralasian Fluid Mechanics Society
Number of pages4
ISBN (Electronic)9781740523776
Publication statusPublished - 2016
EventAustralasian Fluid Mechanics Conference 2016 - The University of Western Australia, Perth, Australia
Duration: 5 Dec 20168 Dec 2016
Conference number: 20th

Conference

ConferenceAustralasian Fluid Mechanics Conference 2016
Abbreviated titleAFMC 2016
CountryAustralia
CityPerth
Period5/12/168/12/16

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