Effects of jet momentum distribution on thermal characteristics of co-swirling flames
- Univ. of Maryland, College Park, MD (United States). Dept. of Mechanical Engineering
Thermal characteristics of flames with various axial and angular inlet momentum distributions are investigated in this experimental study. These flames were stabilized with a co-annular swirl burner having two annular air jets and a central fuel pipe. The heat loading, the Reynolds number, and the overall equivalence ratio were held constant while the swirl and flow distribution were systematically varied between the two air jets. Seven strikingly different unconfined flames were created in this manner. Temperatures were measured with a fine wire thermocouple. A digital compensation technique was used to decrease the thermocouple response time. Fluctuating temperature measurements were obtained in the recirculation zone, shear layer, and post combustion regions. The total swirl number and the total equivalence ratio were insufficient in characterizing thermal effects in these flames. Additional governing parameters are presented which more accurately describe behavior in co-annular burners. These parameters account for the swirl number in each jet, the relative jet strength, and the local stoichiometry at the inlet of the burner.
- OSTI ID:
- 458517
- Report Number(s):
- CONF-960322--; ISBN 0-932066-21-6
- Country of Publication:
- United States
- Language:
- English
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