27th Congress of International Council of the Aeronautical Sciences, 19 - 24 September 2010, Nice, France
Paper ICAS 2010-3.10.3

FLOW INSTABILITY AROUND A 2D AIRFOIL INDUCED BY ACOUSTIC DISTURBANCES AT LOW REYNOLDS NUMBERS

T. Atobe, T. Ikeda
JAXA, Japan

Keywords: computational fluid dynamics, flow stability, aeroacoustics

Flow instability around 2D airfoil at low Reynolds numbers is numerically investigated. Two different unsteady states are reproduced with a slight change of conditions: one is attributed to the wake instability, and the other induces the boundary-layer instability. The latter may be considered as origin of the acoustic feedback loop.

view full paper