Abstract
The effects of various fluid dynamic parameters on the flowfield and, consequently, nitric oxide formation in turbulent jet diffusion flames are analyzed in the present study. The diffusion flame is considered to form in the mixing zone between a finite jet of fuel, such as methane, and a parallel semi-infinite stream of oxidizer, such as air. The theoretical results show that, as the air velocity is increased from stagnant conditions, the NO emission level first decreases and then increases after reaching a minimum at an air-fuel velocity ratio of about 0.5. For air-fuel velocity ratios greater than unity, the emission level decreases monotonically as the air velocity is increased. Flue gas recirculation in fuel stream is found to be more effective than recirculation in air stream by several-fold in reducing NO emission. These results are shown to be the consequences of turbulent diffusion. The effects of turbulence level, air preheat, turbulent Prandtl-Schmidt number, and jet orifice size on NO emission are also investigated and discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
