氢混燃料旋流预混火焰传递函数的实验研究  

Experimental study on flame transfer functions of swirl-premixed flame of hydrogen blended fuel

作　　者：张金锋 胡宏斌[2] 姜磊 王偲臣[2] 王博涵 罗易洲 ZHANG Jinfeng;HU Hongbin;JIANG Lei;WANG Sichen;WANG Bohan;LUO Yizhou(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China;Advanced Gas Turbine Laboratory,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;National Pipeline Network Group Western Pipeline Co.,Ltd,Urumqi 830011,China)

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]中国科学院工程热物理研究所先进燃气轮机实验室,北京100190 [3]国家管网集团西部管道有限责任公司,新疆乌鲁木齐830011

出　　处：《推进技术》2025年第1期115-129,共15页Journal of Propulsion Technology

基　　金：国家科技重大专项(J2019-Ⅲ-0020-0064)。

摘　　要：为测量旋流预混燃烧器的火焰传递函数并探究其火焰动态响应特性,针对声激励下甲烷/空气和甲烷/氢/空气的燃烧特性开展实验研究,掺氢比10%~60%。声激励通过双扬声器施加,频率为20~400 Hz。释热率采用光电倍增管测量火焰自发CH*荧光信号,速度脉动采用双麦克风法测量火焰面处空气速度脉动,并在燃烧室下游使用动态压力传感器采集压力脉动信号,采用数码相机记录火焰图像。实验结果表明,燃料掺氢后,火焰形态由扩张的大火焰向聚拢的短火焰过渡变化,低频激励下火焰时均结构被明显改变。不同条件下的火焰传递函数均有高增益峰和低响应谷,且具备低通和带通特性,带通频率为80~200 Hz,相位则保持线性下降。特别地,高掺氢比火焰在更高频率产生了多个高增益峰,体现了掺氢火焰的高不稳定性特征。To measure Flame Transfer Functions of a swirl-premixed burner and investigate its flame dynamic response to acoustic excitation,experimental studies were conducted on the combustion characteristics of methane/air and methane/hydrogen/air mixtures with hydrogen volume concentrations ranging from 10%to 60%.Acoustic excitation was applied using dual loudspeakers at frequencies ranging from 20 Hz to 400 Hz.The heat release rate was measured using a photomultiplier tube to capture the spontaneous CH*fluorescence signal from the flame.The air velocity fluctuation at the flame front was measured using a dual-microphone method,and the pressure fluctuation signal was acquired downstream of the combustion chamber using dynamic pressure sensors.Besides,flame photographs were recorded using a digital camera.The experimental results indicate that after hydrogen addition,the flame morphology transitioned from an expanded,large flame to a concentrated,short flame.The temporal average structures are significantly changed under low-frequency excitation.The Flame Transfer Functions under different conditions exhibit high-gain peaks and low-response valleys,displaying both low-pass and band-pass characteristics with a passband frequency ranging from 80 Hz to 200 Hz and a linearly decreasing phase.Specifically,flames with high hydrogen content have multiple high-gain peaks at higher frequencies,reflecting the instability of hydrogen-enriched flames.

关 键 词：声激励 旋流火焰 氢混燃料 燃烧不稳定性 火焰传递函数 火焰动态响应 

分 类 号：V231.26[航空宇航科学与技术—航空宇航推进理论与工程]