Publication de 6 numéros par an
ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110
Indexed in
Outflow Boundary Conditions for the Computational Analysis of Jet Noise
RÉSUMÉ
Prediction of far field noise radiation from high speed jets depends upon the accurate computation of the unsteady jet flow features and preserving the wave-like character of such features. It is particularly critical that these features be preserved as the disturbances pass through the computational boundaries. The present effort is directed toward examining various formulations based on the method of characteristics for outflow boundaries. Small harmonic disturbances are introduced at the inflow and the computed results for the growth of the input disturbance are compared against that of linear stability theory using three different outflow boundary conditions in a Navier-Stokes code. Another issue of importance examined in this study is the influence of proximity of the outflow boundary (or length of the computational domain) relative to the jet diameter.