Supersonic Jet Deflection. Part II. Deflection by Inclined Tubular Extensions
Abstract
An investigation was made of the forces involved and the effects produced when supersonic gas jets were deflected in various ways. Air at 400 to 1000 psi was discharged through a nozzle having a 0.5-in. throat to produce a jet of M approx 3. A tubular-extension method of jet deflection was studied over a range of conditions, including tube lengths up to about 4 times the nozzle- throat diameter and inclined up to 20 deg from the normal axis. The system produced stable and reproducible lateral thrusts by a mechanism which is illustrated by shadowgraphs. Lateral thrusts up to 50% of the direct thrust were obtainable; control moments of about 8-lb-ft/100 lb of lateral thrust were necessary. The longer tube lengths inclined the resultant line of thrust by about 5 deg more than the tube angle. The optimum tube length for maximum side thrust averaged about 2.7 times greater than the throat diameter. The forces varied almost linearly with the air-reservoir pressure. The tubular-extension method appeared the most efficient in providing a reliable means of deflection.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1952
- Accession Number
- AD0002099
Entities
People
- P. Eisenklam
- P. Rowe
Organizations
- Imperial College London