The structure of jet diffusion flames issuing into a co-flowing air stream
Book
·
OSTI ID:489036
- Univ. of Calgary, Alberta (Canada). Dept. of Mechanical Engineering
The flow characteristics within a jet diffusion flame in a co-flowing air stream was investigated using a laser-Doppler velocimeter. The flames involved methane discharging from circular and elliptic nozzles with aspect ratios varying from 1.29 to 1.60 at an approximately constant jet area of 16.4 mm{sup 2}. These non-circular nozzles were employed in order to increase the stability of attached flames. The present contribution describes some features of the flow characteristics of jet flames at co-flowing stream velocities associated with the blowout of attached flames. Moreover, the basis for the experimental trends previously observed for the blowout of these flames is also explained. Experimental data suggests that the axis-switching phenomenon, which was associated with initially elliptic jets and contributed to higher jet entrainment rates, occurred hearer to the jet rim for the 1.38 aspect ratio jet compared with the other jets employed. This could explain the higher observed blowout limits for this aspect ratio jet.
- Sponsoring Organization:
- Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada)
- OSTI ID:
- 489036
- Report Number(s):
- CONF-970146--; ISBN 1-890277-04-5
- Country of Publication:
- United States
- Language:
- English
Similar Records
The effect of auxiliary fuel in the co-flowing air stream on the flow structure and blowout limits of diffusion flames
The effects of burner geometry and fuel composition on the stability of a jet diffusion flame
Effect of burner geometry on the blowout limits of jet diffusion flames in a co-flowing oxidizing stream
Conference
·
Wed Dec 30 23:00:00 EST 1998
·
OSTI ID:357752
The effects of burner geometry and fuel composition on the stability of a jet diffusion flame
Book
·
Tue Oct 01 00:00:00 EDT 1996
·
OSTI ID:376311
Effect of burner geometry on the blowout limits of jet diffusion flames in a co-flowing oxidizing stream
Book
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:163210