Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Growth of even and odd instability modes in compressible binary jet flows
Submission Author:
Josuel Kruppa Rogenski , MG
Co-Authors:
Josuel Kruppa Rogenski, Leandro Franco de Souza, Marcio Teixeira de Mendonca, Philip Morris
Presenter: Leandro Franco de Souza
doi://10.26678/ABCM.COBEM2017.COB17-1698
Abstract
The mixing process between different gas species is particularly important in combustion and on the design of jet engines composed by a bypass flow and a core stream. When connecting the efficiency of a mixture process to turbulence, stability of the given baseflow becomes an important way to understand the physics of these problems. Transition of baseflow profiles composed by a planar jet of an A-specie immersed in a B-specie co-flow is studied. Stability of these compressible, binary and planar jets is carried out by means of direct numerical simulations. Both the sinuous and varicose modes show to be potentially unstable. The most dangerous mode is the sinuous one for cases under consideration. Nonlinear topological characteristics are captured and discussed in terms of velocity and vorticity distributions.
Keywords
binary mixture, Laminar-turbulent transition, direct numerical simulation, Compressible Jet Flows
