Abstract
Spontaneous, single-point measurements of nitric oxide, NO, are made jointly with temperature, OH, and the major species using the Raman/Rayleigh/LIF technique. Turbulent non-premixed flames stabilized on a bluff body are studied with fuels ranging from simple H 2 /CO to complex H 2 /CH 4 and gaseous methanol. The fuel jet velocity is varied to investigate the Damkohler number effects on the formation of NO. Data are presented for different axial and radial locations along the full length of most flames. It is found that the NO is generated either in the recirculation zone or further downstream of the neck zone. When the stoichiometric contour lies within the outer vortex, NO is produced mainly within the recirculation zone. Within the neck zone of the flame, the NO index levels are either constant or decreasing. This is due to the lower production of NO and the higher contribution of the consumption mechanisms such as NO reburn to N 2 . The overall NO emission level in flames of CH 3 OH fuel is about a quarter of that measured in H 2 /CO and H 2 /CH 4 flames.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.