Premixed turbulent combustion to opposed streams

Conference · Sun Mar 01 04:00:00 EST 1992

OSTI ID:10160743

Kostiuk, L W; Cheng, R K

Premixed turbulent combustion in opposed streams has been studied experimentally by the use of two component laser doppler aneomometry. This flow geometry is part of a class of stagnating flows used to study turbulent combustion in recent years. It does not involve any surface near the flames because of the flow symmetry thus circumventing many of the effects of flame surface interaction. The mean non-reacting flow is found to be self-similar for all the conditions studied in this and the stagnation plate configuration. A homogeneous region of plane straining is produced in the vicinity of the stagnation and there is a strong interaction between the turbulence in the flow and the mean straining which can increase the rms velocity as the flow stagnates. The reacting flow fields are found to be symmetric about the free stagnation point. The traverses of mean axial velocity in the stagnation streamlines for reaction flows are not dramatically different from the non-reaction flows. These results differ from turbulent combustion experiments where the flow is stagnated by a flat plate. The extinction limits was studied for propane:air mixtures. 11 refs.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada); Edmonton Churchill Foundation
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10160743
• Report Number(s): LBL--32020; CONF-9203140--2; ON: DE92016996
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
100400
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800
AIR
COMBUSTION
COMBUSTION KINETICS
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY
FLAME PROPAGATION
FLAMES
LAMINAR FLOW
LASER DOPPLER ANEMOMETERS
MIXTURES
PROPANE
TURBULENT FLOW
VELOCITY