Non-thermal gliding arc discharge assisted turbulent combustion (up to 80 kW) at extended conditions: phenomenological analysis

Kong, Chengdong; Fan, Qingshuang; Liu, Xin; Subash, Arman Ahamed; Hurtig, Tomas; Ehn, Andreas; Aldén, Marcus; Li, Zhongshan

doi:10.1080/00102202.2022.2065203

Cited by 1 publication

(1 citation statement)

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“…Plasma have been applied upstream of [15,16], in [19,38], or downstream of the flame [39,40]. In recent years, a concept of plasma-assisted ignition-stabilized combustion has been proposed [14,[41][42][43]. In this concept, plasma is applied upstream of the flame such that it ignites the fuel-air flow repetitively.…”

Section: Introductionmentioning

confidence: 99%

On pulse-to-pulse coupling in low-temperature filamentary plasma-assisted ignition in methane-air flows

Patel

Oijen

Nijdam

et al. 2023

Plasma Sources Sci. Technol.

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This work aims to characterize the effects of pulse repetition rate and flow speed on dielectric barrier discharge (DBD) plasma pulse-to-pulse coupling and its ability to ignite methane-air flows. Experiments are performed on a homemade DBD flow reactor with 5 mm discharge gap. Pressure and equivalence ratio are kept constant at 700 mbar and 0.6. First, we perform high-speed intensified imaging to visualize pulse-to-pulse plasma behavior and ignition kernel development. In air flows, plasma morphology changes from multiple weak filaments to a few stronger filaments indicating plasma pulse-to-pulse coupling. This leads to plasma energy addition in nearly thesame gas volume as the previous discharge. The study performed in methane-air flows highlights the importance of plasma pulse-to-pulse coupling for ignition. We find a critical pulse repetition rate and a minimum number of pulses required to achieve a strong enough coupling to develop a successful ignition kernel. Ignition probability and kernel growth are also evaluated for various conditions. Finally, plasma pulse-to-pulse coupling is quantified by measuring the plasma parameters such as gas temperature and reduced electric field from an optical emission spectroscopy.

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