- Author
-
Karagozian, A. R.
|
Nguyen, T. T.
- Title
- Effects of Heat Release and Flame Distortion in the Transverse Fuel Jet.
- Coporate
- California Univ., Los Angeles
- Sponsor
- National Science Foundation, Washington, DC
- Report
-
WSS/CI 86-92,
- Contract
- GRANT-MEA-83-05960
- Book or Conf
- Combustion Institute/Canadian and Western States Section. Spring Meeting, 1986. April 27-30, 1986.,
Banff, Alberta, Canada,
1-30 p.,
1986
- Keywords
-
heat release
|
vortex strength
|
vortex pairs
- Abstract
- An analytical model for a chemically reacting transverse jet is applied to the situation in which effects of compressibility and heat release are important, as in turbulent diffusion flames deflected by an air stream. This model examines the dynamics of the vortex pair structure observed to dominate the flowfield, a structure which causes the combustion process to take place in a bifurcated flame. Heat release is represented through local source terms coincident with reacted cores of combustion products, and vorticity is represented in terms of a nearfield component of vortex strength (due to the crossflow) and a farfield component of vortex strength (due to the fuel jet impulse). Results indicate that the heat release in the reaction acts to reduce the degree of crossflow peneration by the flame, in addition to reducing the strength of the vortices and the magnitude of the vortex spacing. Buoyancy is found to play a lesser role in flame development than that of the jet momentum. Based on comparisons with experimental results, the amount of oxidizer required to be entrained into the flame region is found to be lower than the required in an isothermal reaction.