Abstract
A study of an unsteady characteristic of a supersonic jet flow issuing from annular nozzle was performed by an experiment and numerical analysis. The influence that the nozzle shape of the center part of the annular nozzle exerted on the flow and the pressure vibration was clarified by the experiment. Furthermore, the vortex formed in low-pressure region of the flow of the nozzle exit was clarified by the numerical analysis. Especially, it was clarified that the nozzle shape influenced the vortex and pressure vibration.
