The design of an engine for a civil supersonic aircraft presents a
difficult multidisciplinary problem to propulsion system engineers.
There are numerous competing requirements for the engine, such as
to be efficient during cruise while yet quiet enough at takeoff to
meet airport noise regulations. The use of mixer-ejector nozzles
presents one possible solution to this challenge. However,
designing a mixer-ejector which will successfully address both of
these concerns is a difficult proposition. Presented in this paper
is an integrated multidisciplinary approach to the analysis and
design of these systems. A process that uses several low-fidelity
tools to evaluate both the performance and acoustics of
mixer-ejectors nozzles is described. This process is further
expanded to include system-level modeling of engines and aircraft
to determine the effects on mission performance and noise near
airports. The overall process is developed in the OpenMDAO
framework currently being developed by NASA. From the developed
process, sample results are given for a notional mixer-ejector
design, thereby demonstrating the capabilities of the method.
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