Influence of Intake Orientation on Ramjet Performance

Abstract

The dependency of the performance of a two-dimensional intake for air-breathing missiles on intake orientation has been investigated experimentally. The main objective of the study is to identify the ideal intake position on the missile body. Experiments have therefore been carried out at combinations of different angles of attack and different roll angles of the intake and the missile body. All tests were performed at the intake design Mach number of 2.5 and at angles of attack ranging from 0 to 30 in the Trisonic Wind Tunnel Cologne. The results show that the ideal intake position depends on boundary-layer flow, flow separation, and vortices, which vary with different angles of attack. Furthermore, some intake orientations show a mass flow rise on the windward side, where the intake could be located.