Accession Number : ADA525600


Title :   Experimental/Computational Studies of Combined-Cycle Propulsion: Physics and Transient Phenomena in Inlets and Scramjet Combustors


Descriptive Note : Final technical rept. 1 Jun 2004-30 Nov 2009


Corporate Author : TEXAS UNIV AT AUSTIN DEPT OF AEROSPACE ENGINEERING AND ENGINEERING MECHANICS


Personal Author(s) : Clemens, Noel T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a525600.pdf


Report Date : 22 May 2010


Pagination or Media Count : 49


Abstract : The major accomplishments of an AFOSR-MURI grant focused on transient processes in hypersonic combined-cycle propulsion are described. This effort had two main thrusts: investigation of (i) inlet-isolator physics and unstart control, and (ii) supersonic mixing, combustion and flameholding. The supported work has led to new findings related to the physics of shock-induced turbulent separation and inlet unstart, closed-loop control of inlet unstart, development of kilohertz repetition rate plasma-actuators, understanding of nonequilibrium plasma enhancement of combustion in subsonic and supersonic flameholders, development of the large-eddy simulation technique for compressible jets-in-crossflow, and development of new tunable diode-laser diagnostics for supersonic combustors. The scientific results obtained from this MURI program were widely disseminated to the scientific community via archival journal publications and technical conferences. The MURI effort led to 28 submitted or published papers in archival journals and 8 Ph.D. dissertations.


Descriptors :   *HYPERSONIC CHARACTERISTICS , *PROPULSION SYSTEMS , *SUPERSONIC COMBUSTION RAMJET ENGINES , JET ENGINE INLETS , SIMULATION , TURBULENCE


Subject Categories : Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE