Aerodynamic features of turbulent flamesThe paper provides an interpretation for a variety of turbulent flame phenomena relating them to the aerodynamic properties of the flow field. This includes the classical notion of the breakdown of laminar flames propagation in ducts, the characteristic features of turbulent flame-fronts recorded by schlieren photography, as well as flame instabilities leading to flashback occurring in a combustion chamber behind a bluff-body flame holder. The rudimentary nature of turbulent flame propagation is shown to be associated with (1) vortex motion of a large-scale turbulent eddy, combined with (2) self-advancement of the flame at the appropriate normal burning speed and (3) the concomitant action of distributed sources of specific volume. The results furnish an insight into the macroscopic properties of the mechanism of turbulent flame propagation, rationalizing in particular its capability to sustain high flow velocities at relatively low normal burning speeds.
Document ID
19830035519
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oppenheim, A. K. (California Univ. Berkeley, CA, United States)
Ghoniem, A. F. (California, University Berkeley, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 83-0470
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting