21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-2.8.3

AXISYMETRIC SIMULATIONS OF TURBULENT COMPRESSIBLE FLOWS OVER AEROSPACE VEHICLES

Buonomo C. A., Strauss D., Azevedo J. L. F.*
CTA/ITA/IEAA, Brazil; *CTA/IAE/ ASE-N, Brazil

Keywords: axisymetric simulations, turbulent compressible flows, aerospace vehicles

A detailed study of various turbulent flow conditions over the first Brazilian satellite launcher, the VLS, is described. The emphasis of the work is in developing the capability of accurately simulating realistic rocket flow fields, including the effects of the body base and of a propulsive jet, and in understanding the behavior of three turbulence models in such conditions. The flow fields over the VLS at zero angle of attack are modeled by the axisymmetric, thin layer-Navier-Stokes equations, and turbulence closure, is obtained with the implementation of three different eddy viscosity models. A comparison of the characteristics of these models is performed. Accurate solutions for the transonic and supersonic flight regimes are obtained with emphasis on the vehicle's boundary layer behavior. A study of afterbody flowfields is also included with results for cases with and without propulsive jets.

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