Division of Environmental Physics - User: student
Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava

Stabilization Of A Lean Methane-Air Flame Using Transient Spark Discharge

Janda M., Machala Z., Lacoste D., Stancu G.D., Laux C.O.
13th International Symposium on High Pressure Low Temperature Plasma Chemistry (Hakone XIII), Kazimierz Dolny (Poland) , September 9-14, p. 185-189 (2012)

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Abstract:

Reducing NOx emissions from combustion processes can be achieved by decreasing the
combustion temperature while operating at sub-stoichiometric (lean) conditions. However, there is
a limit at which flame becomes unstable. It was found that this limit can be significantly improved
and the lean flame can be stabilized using high frequency (~kHz) nanosecond repetitively pulsed
(NRP) discharge. NRP discharges generate reactive plasma with high energy efficiency. We tested
a DC-driven self-pulsing transient spark (TS) discharge for the stabilization of a lean premixed
methane-air flame and compared the stabilizing effect with that of the NRP discharge. We found a
very similar stabilizing effect to that of NRP discharge at lower discharge power and with low-cost
DC power supply.