掺氢比例对螺旋微混-旋流复合喷嘴燃烧不稳定的影响研究  

Study on the Effect of Hydrogen Mixing Ratio on Combustion Instability of Spiral Micro-mixing-swirl Compound Nozzle

作　　者：邱成旭 刘佳琦 姜东坡 冯永志 王辉[2,3] QIU Chengxu;LIU Jiaqi;JIANG Dongpo;FENG Yongzhi;WANG Hui(Harbin Turbine Co.Ltd.,Harbin 150046,China;Hadian Power Generation Equipment National Engineering Research Center Co.Ltd.,Harbin 150028,China;School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150006,China)

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046 [2]哈电发电设备国家工程研究中心有限公司,哈尔滨150028 [3]哈尔滨工业大学能源科学与工程学院,哈尔滨150006

出　　处：《动力工程学报》2024年第9期1393-1400,共8页Journal of Chinese Society of Power Engineering

基　　金：黑龙江省重点研发计划资助项目(GA21D002)。

摘　　要：为实现燃气轮机低排放目标,进行了螺旋微混-旋流复合结构喷嘴在不同掺氢比例下的燃烧不稳定特性实验研究。在恒定输出功率下,探究了掺氢体积分数为0%~100%时燃烧室腔体及预燃级内压力振荡状态。结果表明:在主燃级当量比为0.45的条件下,燃烧室压力振幅随着掺氢比例增加先增加后减小,掺氢比例为70%时,燃烧室内出现了2903.4、4490.2 Hz 2种频率的压力振荡信号;该掺氢比例下燃烧产生的这2种压力振荡频率与燃烧室固有声学模态频率重合,进而形成驻波;预燃级一阶声学模态频率为5450 Hz,燃烧区产生的该频段声波传播至预燃级内形成驻波,导致预燃级内出现5400 Hz附近的压力脉动峰值,与燃烧室腔体相反,其在70%掺氢比例工况下的压力脉动幅值最小;综合燃烧室及预燃级压力脉动情况,主燃级的掺氢比例在30%~60%区间最为合适。In order to achieve the goal of low emission for gas turbines,the combustion instability characteristics of spiral micro-mixing-swirl composite nozzles under different hydrogen mixing ratios were experimentally studied.Under constant output power,the pressure oscillation state of combustion chamber and precombustion stage in the range of 0%-100%hydrogen mixing ratio was investigated.Results show that under equivalent ratio of main combustion stage of 0.45,the amplitude of pressure oscillation in the combustion chamber increases first and then decreases with the increase of hydrogen mixing ratio.When the hydrogen mixing ratio is 70%,two frequency pressure oscillation signals of 2903.4 and 4490.2 Hz appear in the combustion chamber.The two frequency pressure oscillations produced by the combustion at the hydrogen mixing ratio coincide with the natural acoustic mode frequencies of the combustion chamber,and then form standing waves.The first-order acoustic mode frequency of the precombustion stage is 5450 Hz,and the sound waves in this frequency band generated by the combustion zone propagate to the precombustion stage to form standing waves,resulting in the peak pressure pulsation near 5400 Hz in the precombustion stage.In contrast to the combustion chamber,the pressure pulsation amplitude is the smallest under the 70%hydrogen mixing condition.Considering the pressure pulsation of combustion chamber and precombustion stage,it is considered that the optimal hydrogen mixing ratio of main combustion stage is in the range of 30%-60%.

关 键 词：燃气轮机 掺氢燃烧 压力振荡 声学模态 

分 类 号：TK2[动力工程及工程热物理—动力机械及工程]