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) : Hankins, Terry B


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a478891.pdf


Report Date : Mar 2008


Pagination or Media Count : 172


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.


Descriptors :   *VALIDATION , *LASER INDUCED FLUORESCENCE , *COMBUSTORS , *COMBUSTION , *LASER DIAGNOSTICS , MODELS , FLAMES , HYDROXYL RADICALS , LAMINAR FLOW , LABORATORIES , EXPERIMENTAL DESIGN , THESES , COMPUTATIONAL FLUID DYNAMICS


Subject Categories : Lasers and Masers
      Combustion and Ignition


Distribution Statement : APPROVED FOR PUBLIC RELEASE