Thrust Augmentation System for Low-Cost-Expendable Turbojet Engine
Abstract
During the performance period, a dump-combustor afterburner and water/methanol injection system were designed, fabricated and tested on a Sundstrand TJ-90 expendable-turbojet engine. Maximum thrust measured was 150 lbs. yielding an augmentation ratio of 1.57. Also evaluated were silicone based and alumina based lining materials for the afterburner combustion tube and coated-graphite and alumina based materials for the exit nozzle. Water/methanol injection was tested at four engine stations: 8 inches upstream of the compressor face, directly upstream of the compressor deswirl vanes, directly into the combustor dilution region and downstream of the turbine exit. Maximum predicted water/methanol flow rates could not be achieved due to combustor flame out. Performance was measured dry, with water/methanol only, with afterburner only and with afterburner and water/methanol injection.... Afterburner, Thrust Augmentation, Expendable Turbojet, Water-Methanol Injection.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1993
- Accession Number
- ADA263727
Entities
People
- Bryan J. Seegers
- David G. Shreiner