NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Mechanism of instabilities in turbulent combustion leading to flashbackHigh-speed schlieren cinematography, combined with synchronized pressure transducer records, was used to investigate the mechanism of combustion instabilities leading to flashback. The combustion chamber had an oblong rectangular cross-section to model the essential features of planar flow, and was provided with a rearward facing step acting as a flameholder. As the rich limit was approached, three instability modes were observed: (1) humming - a significant increase in the amplitude of the vortex pattern; (2) buzzing - a large-scale oscillation of the flame; and (3) chucking - a cyclic reformation of the flame, which results in flashback. The mechanism of these phenomena is ascribed to the action of vortices in the recirculation zone and their interactions with the trailing vortex pattern of the turbulent mixing layer behind the step.
Document ID
19810036204
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Keller, J. O.
(California Univ. Berkeley, CA, United States)
Vaneveld, L.
(California Univ. Berkeley, CA, United States)
Ghoniem, A. F.
(California Univ. Berkeley, CA, United States)
Daily, J. W.
(California Univ. Berkeley, CA, United States)
Oppenheim, A. K.
(California, University Berkeley, Calif., United States)
Korschelt, D.
(California Univ. Berkeley, CA, United States)
Hubbard, G. L.
(California Univ. Berkeley, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 81-0107
Meeting Information
Meeting: Aerospace Sciences Meeting
Location: St. Louis, MO
Start Date: January 12, 1981
End Date: January 15, 1981
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
81A20608
Funding Number(s)
CONTRACT_GRANT: NSG-3227
CONTRACT_GRANT: NSF ENG-77-02019
CONTRACT_GRANT: W-7405-ENG-48
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available