Stable combustion in an afterburner can help increase the thrust of the engine in a short time,thereby improving the maneuverability of a fighter.To improve the ignition performance of an afterburner,a twin-duct ignition platform was designed to study the performance of a gliding arc plasma igniter in close-to-real afterburner conditions.The research was carried out by a combination of experiments and simulations.The working environment of the igniter was explored through a numerical simulation.The results showed that the airflow ejected from the radiating holes formed a swirling sheath,which increased the anti-interference ability of the airflow jet.The influence of the pressure difference between the inlet and outlet of the igniter(△p),the flow rate outside the igniter outlet(W2),and the installation angle(α)on the single-cycle discharge energy(E)as well as the maximum arc length(L)were studied through experiments.Three stages were identified:the airflow breakdown stage,the arc evolution stage,and the arc fracture stage.E and L increased by 107.3％and 366.2％,respectively,with △p increasing from 10 to 70 Torr.The relationship between L and △p obtained by data fitting is L=3-2.47/(1+(△p/25)4).The relationship of L at different a is La=0°＞(La=45° and La=135°)＞La=180°＞Lo=90°.E and L decrease by 18.2％and 37.3％,respectively,when△p=45 Torr and W2 is increased from 0 to 250 1 min-1.

Xinyao CHENG;Huimin SONG;Shengfang HUANG;Yifei ZHU;Zhibo ZHANG;Zhenyang LI;Min JIA

Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi'an 710038,People's Republic of China;China Aerodynamics Research and Development Center,Mianyang 621000,People's Republic of China;Institute of Aeroengine,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China

等离子体科学和技术（英文版）

[1]Xinyao CHENG;Huimin SONG;Shengfang HUANG;Yifei ZHU;Zhibo ZHANG;Zhenyang LI;Min JIA-.Discharge and jet characteristics of gliding arc plasma igniter driven by pressure difference)[J].等离子体科学和技术（英文版）,2022(11):93-105

afterburner

Discharge,jet,characteristics,gliding,plasma,igniter,driven,pressure,difference,Stable,combustion,can,help,thrust,engine,short,thereby,improving,maneuverability,fighter,improve,ignition,performance,twin,duct,platform,was,designed,study,close,real,conditions,research,carried,combination,experiments,simulations,working,environment,explored,through,numerical,results,showed,that,airflow,ejected,from,radiating,holes,formed,swirling,sheath,which,increased,anti,interference,influence,between,inlet,outlet,rate,outside,W2,installation,angle,single,cycle,discharge,energy,well,maximum,length,were,studied,Three,stages,identified,breakdown,evolution,fracture,respectively,increasing,Torr,relationship,obtained,data,fitting,1+,different,La,Lo,decrease,when

0.517613