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Characteristics of a pre-combustion plasma jet igniter

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Plasma ignition technology has delivered good performance in the aerospace industry.In this study,a pre-combustion plasma jet igniter was designed,and its characteristics were examined from three aspects:the morphology,temperature,and discharge characteristics and process of igni-tion.Images of the OH distribution were obtained by using an OH Planar Laser-Induced Fluores-cence(OH-PLIF)experimental system.Results have shown that the proposed plasma jet had a higher OH concentration,longer length,and larger area than those of a traditional igniter.The sta-bility of discharge of the igniter was improved as the equivalence ratio φ was increased,and reduc-ing gas flow reduced the pulsation of the plasma jet.When the input current was increased from 15 A to 35 A,the highest average temperature increased from 5127 K to 7987 K.An increase in the equivalence ratio reduced the region of arc ionization,but expanded the regions of the core com-bustion reaction and the outer flame.Herein,this study has obtained a deep understanding of the jet and ignition law and developed a new idea for the application of plasma in the ignition field.A pre-combustion plasma jet igniter can significantly improve the efficiency of ignition and shorten the ignition process compared with a traditional igniter.

Pre-combustion plasma igni-terPlasmaJet temperature fieldIgnition processArcFlame

Jinlu YU、Baowen ZHANG、Yang YU、Bingbing ZHAO、Lei ZHANG

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Aviation Engineering School,Air Force Engineering University,Xi'an 710038,China

Equipment Management and Unmanned Aerial Vehicle Engineering School,Air Force Engineering University,Xi'an 710038,China

National Natural Science Foundation of ChinaPostdoctoral Science Foundation,ChinaNatural Science Basic Research Program of Shaanxi,China

523061232023M7342772021JQ-046

2024

10.1016/j.cja.2024.03.048

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(7)