Optimization of venturi-cascade enveloped burners
- Univ. of Oklahoma, Norman, OK (United States). School of Aerospace and Mechanical Engineering
An experimental study to control CO, NO and soot emissions of a propane diffusion flame by modifying the air infusion into the flame is presented. The modification was achieved by installing a cascade of venturis around the burning gas jet through which the air inflow was enhanced into the combustion zone. Propane jet diffusion flame at three Reynolds numbers (3600, 5100 and 6500) corresponding to burner-rim-attached, transition from attached to lifted, and fully lifted configurations were examined with different venturi sizes and spacing distributions. Temperature, CO{sub 2}, O{sub 2} and pollutant emissions (CO and NO) in the exhaust combustion products were measured before and after the modification and optimal conditions were obtained. The influence of venturi size was stronger than that of the spacing distribution. The optimal venturi diameter was between D/d = 27.5 and D/d = 3.5 which corresponded to an approximate clearance of 3 to 10 mm between the venturi throat and the burning jet (and most likely near the upper limit). The optimal configuration was the equal spacing in which the venturis were distributed equally over the flame length. The best effect of venturis was observed on the flame in transition from attached to lifted configurations. The Cascading technique at its optimal conditions compared to the baseline case of this study has shown the following: (1) visible flame length increases approximately by 18%; (2) CO{sub 2} concentration increases by 174%; and (3) CO and NO emission indices decrease by 87% and 33% respectively.
- OSTI ID:
- 357758
- Report Number(s):
- CONF-980213-; TRN: IM9932%%103
- Resource Relation:
- Conference: 1998 energy sources technology conference, Houston, TX (United States), Feb 1998; Other Information: PBD: 1998; Related Information: Is Part Of Proceedings of the 1998 ASME energy sources technology conference (ETCE`98); PB: [1170] p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Optimization and structure of gas jet diffusion flames in venturi-cascade burners
CONTROL OF POLLUTANT EMISSIONS IN NATURAL GAS DIFFUSION FLAMES BY USING CASCADE BURNERS