PASSIVE CONTROL OF TRANSONIC BUFFET ONSET ON A HALF WING–BODY CONFIGURATION

S. Timme, F. Sartor

DOI Number: N/A

Conference number: IFASD-2015-088

This paper presents a numerical study of the transonic ﬂow over a half wingbody conﬁguration representative of a large civil aircraft. Results indicate the presence of shock-wave oscillations that induce unsteady loads and can cause serious damage to the aircraft. The work focusses on the onset of the buﬀet unsteadiness and its control by means of passive control devices. Reynolds-averaged Navier-Stokes simulations using the Spalart-Allmaras turbulence model are considered with vortex generators fully resolved and included into the computational grid. It is shown how mechanical vortex generators modify the ﬂow ﬁeld downstream of the shock location by suppressing separation and are thus able to delay buﬀet onset.

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Computational Fluid Dynamics, DLR-TAU Code, Half Wing-Body Conﬁguration, Mechanical Vortex Generators, Shock Buﬀet Onset, Transonic Flow

In Categories: 2. IFASD 2015, Aerodynamics/CFD

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