Paul R. Moran
Acoust. Program, Appl. Res. Lab., Penn State Univ., P.O. Box 30, State College, PA 16804
An unsteady compressible Euler code was developed for flow through a nozzle. Method of characteristic boundary conditions were used to permit the unsteady pressure to be nonzero downstream of the exit boundary. The flow is perturbed by modulating the cross-sectional area in the midsection of the nozzle. The far-field unsteady pressure was determined for both steady and unsteady inlet velocities and compared to experimental results.