Abstract
Absolute NO concentrations are measured in low-pressure methane-oxygen-nitrogen flames of varying stoichiometry, using laser-induced fluorescence. These measurements are combined with previously measured absolute CH radical concentrations to test the chemical mechanism of prompt NO formation and NO reburn. The GRI-Mech 2.11 chemical mechanism underpredicts prompt NO by 35–60%. Increasing the rate coefficient for the CH+N2 reaction brings the predicted [NO] into agreement with the measurements. Reburn chemistry is studied by seeding NO at concentrations between 0.1% and 3% in rich and lean flames. The model agrees with the observed reduction of NO in a fuel-lean (=0.80) flame and underpredicts NO reburn in a fuel-rich (=1.27) flame. The model predicts significantly more reduction of the peak CH concentration by reburn of seeded NO in the rich flame than is measured.
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.
