Boundary conditions for jet flow computations

M. E. Hayder, Eli Turkel

Research output: Contribution to conferencePaperpeer-review


Ongoing activities (Mankbadi et al1) are focused on capturing the sound source in a supersonic jet through careful LES. One issue that is addressed herein is the effect of the boundary conditions, both inflow and outflow, on the predicted flow fluctuations, which represent the sound source. In this study, we examine the accuracy of several boundary conditions to determine their suitability for computations of time-dependent flows. Various boundary conditions are used to compute the flow field of a laminar axisymmetric jet excited at the inflow by a disturbance given by the corresponding eigenfunction of the linearized stability equations. We solve the full time dependent Navier-Stokes equations by a high order numerical scheme. For very small excitations, the computed growth of the modes closely corresponds to that predicted by the linear theory. We then vary the excitation level to see the effect of the boundary conditions in the nonlinear flow regime.

Original languageEnglish
StatePublished - 1994
EventAIAA Fluid Dynamics Conference, 1994 - Colorado Springs, United States
Duration: 20 Jun 199423 Jun 1994


ConferenceAIAA Fluid Dynamics Conference, 1994
Country/TerritoryUnited States
CityColorado Springs


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