Abstract
This research proposes a study of the leading edge of the methane-air triple flame characteristics. Few experiment results are available for physical examination, so an experimental investigation must be conducted to understand the stability mechanisms in a mixture with a steep concentration gradient. To this end, applying acetone-laser-induced fluorescence (acetone-LIF) is studied for measuring concentration profiles at the leading edge of the flame. The results demonstrate that the lifted height is changed when acetone is added to the mixture. It correlates closely with increasing C2 radical behind the flame edge. Meanwhile, the OH radical luminous intensity measured with a spectroscope is not changed. Moreover, the burning velocity of methane-acetone-air mixture obtained by the Bunsen burner method remains constant. Therefore, the influence of acetone on burning intensity is small. Acetone LIF can thus be advantageous for measuring the local concentration gradient at the leading edge. The acetone LIF signals can be revised considering the thermal effect using the silicone oil vanishing plane. After temperature correction, the transition of the flammability limit width upstream of the flame at a steep concentration gradient can be observed as clearly as in the recent numerical result.
Sign-in/Register to access full text options 
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 callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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.
