Accession Number : ADA540182


Title :   Characterization of Horizontally-Issuing Reacting Buoyant Jets


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) : Heffernen, Joshua J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a540182.pdf


Report Date : Mar 2011


Pagination or Media Count : 193


Abstract : This research studied the mixing and combustion behavior of low Reynolds number, horizontally-issuing gaseous fuel jets with ambient air. The study focused on the mixing characteristics of propane and ethylene. These fuels are, respectively, heavy and neutral with respect to air, and were tested at various Froude numbers and laminar tube Reynolds numbers. Using low Froude and Reynolds number flows allowed for isolation of the buoyant jet effects. The process was characterized through the use of a non-invasive, OH Planar Laser-Induced Fluorescence (PLIF) technique, and supplemented with filtered (CH*) and unfiltered high speed imaging. The resulting cross sectional PLIF images were used to produce a three-dimensional mapping of the jet spreading, jet path, and combustion progress through OH concentrations up to x/D = 9, for both fuels. Combustion locations were further visualized and confirmed through CH* high speed imaging.


Descriptors :   *JET ENGINE FUELS , AIR , THESES , ETHYLENE , COMBUSTION , FROUDE NUMBER , LAMINAR FLOW , REYNOLDS NUMBER , PROPANE , BUOYANCY , LASER INDUCED FLUORESCENCE , IMAGES


Subject Categories : Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE