Accession Number : ADA512780


Title :   Laser-Induced Fluorescence and Synthetic Jet Fuel Analysis in the Ultra Compact Combustor


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) : Drenth, Aaron C


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a512780.pdf


Report Date : Dec 2009


Pagination or Media Count : 163


Abstract : The Ultra Compact Combustor is currently under investigation at the Air Force Institute of Technology and Air Force Research Laboratory's Propulsion Directorate. This combustor is a small-scale, axi-symmetric, atmospheric pressure, laboratory combustor with an outer circumferential cavity in which the flame is stabilized by a highly accelerated swirled flow. This ultra-compact combustor (UCC) will enable aero gas turbine reheat cycle engines and significantly shorten conventional aero gas turbine engines. The experiments of this work utilized the AFIT small-scale combustion diagnostics facility, investigating a sector model of the UCC. The objectives of this research was to perform an addition to and validation of the COAL lab laser diagnostic system and to begin the characterization of a small-scale model of an UCC using hydrogen, and both traditional and synthetic jet fuels. Validation of the laser system was accomplished by using two-line planar laser induced fluorescence (PLIF) on a laminar premixed hydrogen-air flame produced by a Hencken burner. OH species concentrations were measured. Flame temperatures were 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. Operational procedure of the Hencken burner and UCC were modified as necessary. The ignition system was modified and UCC starting conditions have been updated. Emissions data was collected using synthetic jet fuel and compared to traditional jet fuel. Future work will involve using PLIF to further study the cavity-vane interactions of the UCC.


Descriptors :   *SYNTHETIC FUELS , *COMBUSTORS , *JET ENGINE FUELS , *LASER INDUCED FLUORESCENCE , ELECTRON TRANSITIONS , LAMINAR FLOW , LASER DIAGNOSTICS , COMBUSTION CHAMBERS , THESES , FLUORESCENCE , BAROMETRIC PRESSURE


Subject Categories : Radiation and Nuclear Chemistry
      Combustion and Ignition
      Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE