Accession Number : ADA596950


Title :   Engine-Level Simulation of Liquid Rocket Combustion Instabilities


Descriptive Note : Book chapter Jan-Jul 2013


Corporate Author : AIR FORCE RESEARCH LAB EDWARDS AFB CA AEROSPACE SYSTEMS DIRECTORATE


Personal Author(s) : Menon, Suresh ; Talley, Douglas G


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA596950


Report Date : Jan 2013


Pagination or Media Count : 8


Abstract : A numerical investigation into combustion instability in liquid rocket engines is undertaken using large eddy simulations (LES). HPCMP resources have been applied to demonstrate the ability to simulate combustion instability in liquid rocket engines and to gain further understanding of these complex phenomena. Specifically, simulations have been used to uncover the unsteady instability mechanism in a single‐element injector. Results show that it is a combination of three events that lead to the instability and the timing of the events are critical. A second investigation has begun to apply LES to multi‐element injectors, which require significant resources. Finally, an investigation into the use of approximate boundary conditions, relevant to multi‐element injectors, showed that caution must be used when applying approximate boundary conditions. The results show that approximate boundary conditions led to different heat release locations and mixing downstream of the boundary.


Descriptors :   *COMBUSTION , *INSTABILITY , *LIQUID PROPELLANT ROCKET ENGINES , DOWNSTREAM FLOW , INJECTORS , NUMERICAL ANALYSIS , SIMULATION


Subject Categories : Combustion and Ignition
      Liquid Propellant Rocket Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE