Combustion instability is a very important issue in the development of the propulsion systems used in aerospace.It is very important to associate the high frequency combustion instabil-ities with the acoustic characteristics of the combustion chamber.In this paper,the effects of var-ious baffle injectors which were installed on the injector faceplate on the first-order tangential acoustic mode were investigated theoretically and experimentally.The effects of the gap between adjacent injectors on the first-order tangential acoustic mode in a cylindrical chamber were consid-ered.The acoustic admittance of the injectors was derived.The results showed that the amplitude and frequency of the first-order tangential acoustic mode increase with the increase in the gap between adjacent injectors,but decrease with the increase in the number and height of the baffles.The baffle injectors have a greater influence on the amplitude and frequency of the first-order tan-gential acoustic mode than the baffle blades.

Runze DUAN;Heng ZHANG;Liang TIAN;Enyu WANG;Liansheng LIU

School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Thermal Science and Energy Clean Utilization,Tianjin 300401,China

中国航空学报（英文版）

[1]Runze DUAN;Heng ZHANG;Liang TIAN;Enyu WANG;Liansheng LIU-.Effect of baffle injectors on the first-order tangential acoustic mode in a cylindrical combustor)[J].中国航空学报（英文版）,2022(10):106-117

instabil,faceplate,gential

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