Evaluation of Fuel Character Effects on J79 Smokeless Combustor
Abstract
Results of a program to determine the effects of broad variations in fuel properties on the performance, emissions, and durability of the J79-17C turbojet engine combustion system are presented. Thirteen different fuels were tested, covering a range of hydrogen contents, aromatic types, boiling ranges, and viscosities. At high power operating conditions, fuel hydrogen content was found to be a very significant fuel property with respect to linear temperature, flame radiation, smoke, and NOx emission levels. At idle and cruise operating conditions, CO and HC emission levels were found to be dependent on both fuel hydrogen content and relative spray droplet size. At cold day ground start conditions lightoff correlated with the relative fuel droplet size. Altitude relight limits at low flight Mach numbers were fuel dependent and also correlated with the relative fuel droplet size. Combustor liner life analyses, based on the test data, yielded relative life predictions of 1.00, 0.93, 0.83, and 0.73 for fuel hydrogen contents of 14.5, 14.0, 13.0, and 12.0 percent, respectively. High temperature cyclic fuel nozzle fouling tests revealed significant effects of fuel quality and operating temperature on nozzle life. The results correlated with laboratory thermal stability ratings of the fuels.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1980
- Accession Number
- ADA095057
Entities
People
- C. C. Gleason
- M. J. Kenworthy
- M. W. Shayeson
- T. L. Oller
Organizations
- General Electric