Optimizing the Thrust Deflecting Surface for the Pneumatic Thrust Deflector.
Abstract
A pneumatic thrust deflector has been developed in which the thick slipstream from a turbojet is deflected by blowing a thin jet sheet tangentially over a deflecting surface adjacent to the slipstream. In developing this concept, three geometries have been evaluated for the thrust deflecting surface. The three deflecting surfaces are cylindrical with a semicircular, a quarter-circular, or a semielliptical cross section. The range of thrust deflection achievable with each deflecting surface was determined by using each surface to deflect the slipstream of a small turbojet simulator. In the cold gas investigation, a thrust deflection of 20 deg or more was achieved with this mechanically simple system. The cold gas performance is compared to the range of thrust deflection achieved by pneumatically deflecting the hot gas of a small turbojet. Results of the hot gas investigation are also presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1984
- Accession Number
- ADA140612
Entities
People
- David W Taylor
- M. J. Harris