Subsonic Flight Investigation of Rectangular Ram Jet over Range of Altitudes
Abstract
A flight investigation was conducted on a rectangular ram jet incorporating a V-shaped gutter-type flame holder over a range of fuel-air ratios from 0.019 to 0.122, combustion-chamber-inlet velocities from 39 to 101 feet per second, and pressure altitudes from 1500 to 29,200 feet. The maximum combustion efficiency obtained was approximately 84 percent at a fuel-air ratio of 0.069 and a pressure altitude of 1500 feet. An increase in altitude resulted in a pronounced decrease in combustion efficiency. The highest pressure altitude at which ignition was possible with the spark plug and ignition cone was 22,500 feet. Above 12,000 feet, an increase in altitude increased the value of fuel-air ratio at which lean blow-out occurred. Rough engine operation was encountered only at altitudes above 20,000 feet as the fuel-air ratio approached the lean or rich blow-out limits.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 19, 1948
- Accession Number
- ADA801477
Entities
People
- Dugald O. Black
- Wesley E. Messing
Organizations
- Glenn Research Center