USE OF LINEARIZED ENTER EQUATIONS FOR SUPERSONIC JET NOISE PREDICTION

The use of linearized Euler equations for direct prediction of superso nic jet noise is explored. It is shown that a high-order numerical sch eme coupled with proper boundary treatment can produce a stable soluti on nearly free from reflections. Results are verified against analytic al results for sound radiated by instability waves. Applicability of t his approach to real jets is explored by taking the inflow disturbance s to be random in time and comparing the computed sound field to the e xperimentally measured one.