径向分级燃烧室热声特性的试验研究  

Experimental study on thermoacoustic performance of radial staged combustor

作　　者：傅燕妮 隋永枫[2] 张宇明[2] 郑耀[1] 夏一帆[1] FU Yan-ni;SUI Yong-feng;ZHANG Yu-ming;ZHENG Yao;XIA Yi-fan(School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China;Hangzhou Steam Turbine Limited Company,Hangzhou 310022,China)

机构地区：[1]浙江大学航空航天学院,浙江杭州310027 [2]杭州汽轮机股份有限公司,浙江杭州310022

出　　处：《浙江大学学报（工学版）》2023年第6期1234-1241,共8页Journal of Zhejiang University：Engineering Science

基　　金：浙江省重点研发计划资助项目(2020C01088)。

摘　　要：为了探究径向分级燃烧室燃料分配比例对燃烧室热声特性的影响,对工业级单筒4 MW功率等级径向分级燃烧室进行试验研究.试验中通过改变径向上值班喷嘴和主燃喷嘴的燃料分配比例,分析燃料分配比例对动态压力特征频率和幅值的影响.采用相空间重构方法和递归分析方法,探究燃料分配比例变化过程中燃烧室内热声状态的变化特征.结果表明,燃烧室内整体存在低频(70~90 Hz)和高频(200~230 Hz)2个主导频率.在燃料分配比例调节过程中,出现低频向高频跃迁现象.相空间重构图和递归图显示,当燃料分配比例增大时,燃烧室内热声状态存在切换过程:由准周期状态过渡为混沌状态,最终切换至极限环状态.In order to investigate the effect of fuel distribution ratio of a radial staged combustor on the thermoacoustic characteristics,experimental tests were carried out on a 4 MW industrial can combustor,which had the radial staged combustor.In the tests,by changing the fuel distribution ratio of the pilot burner and the main burner,the influence of fuel distribution ratio on the frequency and amplitude of the dynamic pressure was analyzed.The phase space reconstruction method and the recursive analysis were used to investigate the thermoacoustic variation characteristics of the combustor during the process of changing the distribution ratios.Results showed that there were two dominant frequencies of a low frequency(70−90 Hz)and a high frequency(200−230 Hz)in the combustor.During the process of changing the fuel distribution ratio,the dominant frequency jumped from the low frequency to the high frequency.The reconstructed phase plots and the recurrence plots showed that as the fuel distribution ratio increased,the thermoacoustic state in the combustion chamber had a switching process.The thermoacoustic state transitioned from quasi periodic state to chaotic state,and finally switched to limit cycle state.

关 键 词：径向分级燃烧室 热声振荡 相空间分析 递归分析 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]