Accession Number : AD1013219


Title :   Premixed Supersonic Combustion (Rev)


Descriptive Note : Technical Report,01 Aug 2013,14 Sep 2014


Corporate Author : University of Virginia Charlottesville United States


Personal Author(s) : Goyne,Christopher ; Rockwell,R ; Rice,B ; Chelliah,H ; McDaniel,J ; Edwards,J ; Danehy,P


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/1013219.pdf


Report Date : 20 Feb 2015


Pagination or Media Count : 33


Abstract : Hypersonic air-breathing engines rely on scramjet combustion processes, which involve high speed, compressible, and highly turbulent flows. The combustion environment and the turbulent flames at the heart of these engines are difficult to simulate and study in the laboratory under well controlled conditions. Typically, wind-tunnel testing is performed that more closely approximates engine testing rather than a careful investigation of the underlying physics that drives the combustion process. The experiments described in this report, along with companion data sets developed separately, aim to isolate the chemical kinetic effects from the fuel-air mixing process in a dual-mode scramjet combustion environment. A unique fuel injection approach is taken that produces a uniform fuel-air mixture at the entrance to the combustor. This approach relies on the precombustion shock train upstream of the dual-mode scramjet combustor. A stable ethylene flame anchored on a cavity flame holder with a uniformly mixed combustor inflow was achieved in these experiments, allowing numerous companion studies involving coherent anti-Stokes Raman scattering (CARS), particle image velocimetry (PIV), and planar laser induced fluorescence (PLIF) to be performed.


Descriptors :   SUPERSONIC COMBUSTION , kinetics , fuel injection , TURBULENT FLOW , AIR BREATHING ENGINES , Raman scattering , particle image velocimetry , laser induced fluorescence , WIND TUNNEL TESTS , mixing , air flow , pressure , temperature , Mach Number


Subject Categories : Combustion and Ignition
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE