Accession Number : ADA589153


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 ; Akella, Maruthi ; Cappelli, M ; Dolling, David S ; Hanson, Ronald ; Lele, Sanjiva ; Mungal, Godfrey ; Raja, Laxminarayan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a589153.pdf


Report Date : 01 Oct 2010


Pagination or Media Count : 54


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 (1) inlet-isolator physics and unstart control, and (2) supersonic mixing, combustion and flameholding. The supported work 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 non-equilibrium 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 disseminated widely 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 :   *COMPUTATIONS , *INLETS , *PROPULSION SYSTEMS , *TRANSIENTS , ACTUATORS , COMBUSTION , CROSS FLOW , CYCLES , PHYSICS , SEPARATION , SIMULATION , THRUST , TURBULENCE


Subject Categories : Numerical Mathematics
      Electricity and Magnetism
      Thermodynamics
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE