Accession Number:

ADA478891

Title:

Laser Diagnostic System Validation and Ultra-Compact Combustor Characterization

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s):

Report Date:

2008-03-01

Pagination or Media Count:

172.0

Abstract:

The AFIT combustion optimization and analysis laser COAL lab is now completely operational and is state-of-the-art in combustion diagnostics. The objective of this research is to perform a validation of a laser diagnostic system and to begin the characterization of a small-scale model of an ultra-compact combustor UCC. Validation of the laser system was accomplished by using planar laser induced fluorescence PLIF on a laminar premixed hydrogen-air flame produced by a Hencken burner. OH species concentrations are measured. Flame temperatures are determined with a two line fluorescence technique using different transitions in the 1,0 band of the OH A-X electronic transition system. Comparisons are made to existing research to prove accuracy. Characterization of the UCC began by developing an operational procedure. A proper starting condition and operating regime has been established. Pressures, temperature, and emissions data have been recorded for a range of equivalence ratios. Comparisons are made to previous computational fluid dynamic CFD research. Combustion efficiencies of over 99 have been recorded when operating the small-scale UCC. Future work will involve using PLIF to take non-intrusive measurements inside the combustor through optically clear quartz windows to study cavity-vane interactions.

Subject Categories:

  • Lasers and Masers
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE