Characteristics of a Confined Jet Thrust Vector Control Nozzle
Abstract
A study of confined jet thrust vector control (CJTVC) is presented. By isolating an area of flow separation within the body of a nozzle, CJTVC has the advantage over other thrust vector controls using secondary injection (SI) in that it can operate independent of altitude. This makes it ideal for applications in small missiles and spacecraft attitude control. In this study, axial thrust, side force, and pressure distribution across the nozzle were measured. The parameters were SI pressure, primary short supply pressure, and SI port area. Results indicate that there is a lower limit to the supply pressure ratio (SI pressure to primary pressure) and SI mass flow below which, the nozzle will not produce side force. Also, above a primary pressure of 200 psig, the undeflected jet exhibits instabilities. Without SI, a 4 Hz oscillation occurs in the nozzle and switching jet attachment occurs near the throat.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 21, 1985
- Accession Number
- ADA153087
Entities
People
- Anthony J. Porzio
Organizations
- Air Force Institute of Technology