Experimental study on energy characteristics and ignition performance of recessed multichannel plasma igniter

doi:10.1088/1674-1056/ab820c

Abstract In the extreme conditions of high altitude, low temperature, low pressure, and high speed, the aircraft engine is prone to flameout and difficult to start secondary ignition, which makes reliable ignition of combustion chamber at high altitude become a worldwide problem. To solve this problem, a kind of multichannel plasma igniter with round cavity is proposed in this paper, the three-channel and five-channel igniters are compared with the traditional ones. The discharge energy of the three igniters was compared based on the electric energy test and the thermal energy test, and ignition experiments was conducted in the simulated high-altitude environment of the component combustion chamber. The results show that the recessed multichannel plasma igniter has higher discharge energy than the conventional spark igniter, which can increase the conversion efficiency of electric energy from 26% to 43%, and the conversion efficiency of thermal energy from 25% to 73%. The recessed multichannel plasma igniter can achieve greater spark penetration depth and excitation area, which both increase with the increase of height. At the same height, the inlet flow helps to increase the penetration depth of the spark. The recessed multichannel plasma igniter can widen the lean ignition boundary, and the maximum enrichment percentage of lean ignition boundary can reach 31%.

Keywords: high altitude extreme condition recessed multichannel plasma igniter discharge energy lean ignition boundary

Received: 21 January 2020
Revised: 06 March 2020
Accepted manuscript online:

PACS:	52.80.Mg	(Arcs; sparks; lightning; atmospheric electricity)
	52.25.Jm	(Ionization of plasmas)
	52.50.-b	(Plasma production and heating)
	52.50.Nr	(Plasma heating by DC fields; ohmic heating, arcs)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 91641204).

Corresponding Authors: Hui-Min Song
E-mail: min_cargi@sina.com

Cite this article:

Bang-Huang Cai(蔡帮煌), Hui-Min Song(宋慧敏), Min Jia(贾敏), Yun Wu(吴云), Wei Cui(崔巍), Sheng-Fang Huang(黄胜方) Experimental study on energy characteristics and ignition performance of recessed multichannel plasma igniter 2020 Chin. Phys. B 29 065207

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Experimental study on energy characteristics and ignition performance of recessed multichannel plasma igniter

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