基于自激扫掠喷嘴的加力燃烧效率试验  

Experiment on afterburner combustion efficiency based on self-excited sweeping nozzle

作　　者：王士奇 温泉 贾志刚 程奕鑫 李林 张弛[2] 霍伟业 马梁 WANG Shiqi;WEN Quan;JIA Zhigang;CHENG Yixin;LI Lin;ZHANG Chi;HUO Weiye;MA Liang(Aero Engine Academy of China,Aero Engine Corporation of China,Beijing 101304,China;Research Institute of Aero-Engine,Beihang University,Beijing 100191,China;School of Aeronautics and Astronautics,North China Institute of Aerospace Engineering,Langfang 065000,China;Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国航空发动机集团有限公司中国航空发动机研究院,北京101304 [2]北京航空航天大学航空发动机研究院,北京100191 [3]北华航天工业学院航空宇航学院,廊坊065000 [4]中国民航大学天津市民用航空器适航与维修重点实验室,天津300300

出　　处：《航空学报》2025年第2期145-158,共14页Acta Aeronautica et Astronautica Sinica

基　　金：先进航空动力创新工作站(HKCX2022-01-010);国家自然科学基金(52306052)。

摘　　要：为了验证自激扫掠喷嘴应用于加力燃烧室的可行性,以及高频动态扫掠燃油喷射方法对于提高加力燃烧效率的有效性,本研究首先设计了耦合自激扫掠喷嘴结构的加力燃油喷杆,对其流量、频率、张角等基本工作特性进行测量,并与圆孔直射式喷杆进行对比分析。然后,基于矩形加力燃烧室性能测试平台,在相同工况条件和油气比范围内,分别采用直射喷杆和自激扫掠喷杆,测量总体燃烧效率,并监测壁面动态压力脉动信息。结果表明,在10 mm直径的加力燃油喷杆内,可实现多个自激扫掠喷嘴的结构耦合;与等几何通径的直射式喷杆相比,自激扫掠喷杆的流通能力提高了23%;同一喷杆内的多个自激扫掠喷嘴,其工作频率和扫掠张角随进口压力的变化规律基本相同,具有较好的一致性。采用自激扫掠喷杆,加力燃烧效率可提高3.7%,且未监测到与自激扫掠喷嘴工作频率相同或接近的压力脉动频率,表明高频动态扫掠燃油喷射不会对火焰热声振荡模态及稳定器后方的大尺度脱落涡结构产生直接影响。To prove the feasibility of applying the self-excited sweeping nozzle in the afterburner,and the effectiveness of high frequency dynamic sweeping fuel injection methods for improving the efficiency of afterburner combustion,this study designed a fuel spray bar integrated with the self-excited sweeping nozzles,tested its basic working characteristics,such as flow rate,frequency and sweeping angle,and further compared these characteristics with the plainorifice spray bar.Then,based on the rectangular afterburner test rig,under the same test conditions and the fuel-toair ratio range,the overall combustion efficiencies are tested and the dynamic wall pressure pulsation information is monitored,employing the plain-orifice spray bar and self-excited sweeping spray bar respectively.The results show that multiple self-sweeping nozzles can be integrated into the spray bar with the diameter limitation of 10mm.the flow capability of the self-excited sweeping spray bar is increased by 23%,compared to the plain-orifice spray bar with the equivalent geometric flow area.For the nozzles in the same spray bar,their operating frequency and sweeping angle responses to the pressure drop are basically the same and have good consistency.The afterburner combustion efficiency is improved by 3.7%,by employing the self-excited sweeping spray bar,and no dynamic pressure pulsation frequency is detected which is the same or close to the operating frequency of self-excited sweeping nozzle,indicating that high frequency dynamic sweeping fuel injection has no direct impact on the flame thermoacoustic oscillation mode and large scale shedding vortex structure downstream the flameholder.

关 键 词：自激扫掠喷嘴 高频动态扫掠喷射 加力燃烧室 振荡频率 压力脉动 流体振荡器 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程] V235.1