Design Guideline of Diverter for Supersonic Propulsion System

Abstract

A parametric study on configurations of a boundary-layer diverter for supersonic propulsion system was conducted using CFD simulation to examine those effects on the flow field and the performances of the diverter. The performances were evaluated in terms of its aerodynamic drag and ingestion of the boundary-layer on the airframe surface. Height, width, and apex angle of the diverter were used as the parameters. It is found that narrow width yields good performances in terms of the drag as well as the boundary-layer ingestion. The effect of height and apex angle exhibits trade-off between aerodynamic drag and ingesting the boundary-layer. In the design process of diverter, firstly, the width of diverter should be set to minimum value, then, the apex angle and the height should be optimized.