LEAN FLAME STABILIZATION WITH NANOSECOND PLASMA DISCHARGES IN A GAS TURBINE MODEL COMBUSTOR

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外文摘要：This paper presents an experimental study of lean flames stabilization with nanosecond repetitively pulsed discharges。 The two-stage， swirled-stabilized， multipoint injector BIMER operates at atmospheric pressure with methane-air mixtures in the present study。 It is representative in its design of a realistic lean premixed prevaporized injector of gas turbine engines operated at a lab-scale level。 The lean blow-off extension with plasma is characterized。 The combustion efficiency and the pollutant emissions are quantified near blow-off with and without plasma for 50-kW flames。 We show that it is possible to stabilize lean flames down to an equivalence ratio of 0。3， with less than 5 ppm of NO_X emitted， thanks to NRP discharges with an electric power that represents less than 0。25% of the flame thermal power。 This study also clearly shows that it is necessary to account for the plasma system integration at the early stage of the combustor design to fully benefit from the plasma stabilizing effects on the flame。

外文关键词：

plasma-assisted combustionNRP dischargesgas turbinelean flamespollutant emissionsNO_X reductioncombustion efficiency

作者：

Victorien P. Blanchard、Frederic Roque、Philippe Scouflaire、Christophe O. Laux、Sebastien Ducruix

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作者单位：

Laboratoire EM2C, CNRS, CentraleSupelec, Universite Paris-Saclay Gif-sur-Yvette, France

会议名称：

ASME Turbo Expo: Turbomachinery Technical Conference and Exposition

会议地点：

Boston(US)

会议母体文献：

Proceedings of ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition

页码：

847-859

出版时间：

2023