This paper examines the stabilization of premixed and jet diffusion flames of methane, ethane, and propane by nanosecond repetitive pulsed plasma discharges. Combustion products are measured using gas chromatography while laser-induced breakdown spectroscopy (LIBS) is used to characterize the local equivalence ratios. We find that in premixed flames, although plasma-assisted flame holding takes place under fuel-lean conditions, propagation of combustion occurs at/or above the known lean flammability limits. In jet diffusion flames, the flames are found to be anchored best to the discharge at jet speeds that are much higher than the normal blow-off speed when the discharge is placed where the local fuel-air equivalence ratio is in a limited flammable regime.
|Number of pages
|Combustion and Flame
|Published - 2013 Nov
Bibliographical noteFunding Information:
This work is supported by the National Science Foundation and the Department of Energy through the NSF/DOE Partnership in Basic Plasma Science. Partial support for M.S. Bak is provided through a Stanford Graduate Fellowship.
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Fuel Technology
- Energy Engineering and Power Technology
- General Physics and Astronomy