横向射流对Rijke型燃烧器热声不稳定控制效果的影响  

Investigation of the Control Effects of the Transverse Jet on the Thermoacoustic Instability in the Rijke Combustor

作　　者：周昊[1] 王恒栋[1] 黄燕[1] 王岩[1] 岑可法[1] 

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江省杭州市310027

出　　处：《中国电机工程学报》2015年第12期3075-3080,共6页Proceedings of the CSEE

基　　金：国家科技攻关计划项目(2011BAA04B01);浙江省自然科学基金资助项目(LZ12E06002)~~

摘　　要：为了研究横向射流控制Rijke型燃烧器内自激热声不稳定的机理,搭建了Rijke型燃烧器热声不稳定控制试验台架。Rijke型燃烧器采用贫燃预混的燃烧方式,使用氮气作为射流气体进行横向射流主动控制。试验测量了不同射流速度和射流流量情况下Rijke型燃烧器热声振动的振幅和频率,分析了二者对控制效果的影响。试验发现横向射流是有效的Rijke型燃烧器热声不稳定控制方法,Rijke型燃烧器热声不稳定的控制效果随横向射流进气速度和横向射流进气流量的增加而线性增加,另外,当射流气体速度为24.00 m/s,流量为4.52 L/min时,控制效果高达98.81%,此时仅有小幅低频振动。ABSTRACT：Experimental test facility was built to study the controlling mechanism of the self-excited thermoacoustic instability in the Rijke combustor with a transverse jet. Rijke combustor is a lean-premixed natural-gas combustor using nitrogen as transverse jet for active control. Pressure amplitudes and frequencies of the combustion instability were tested with variable jet velocities and jet flow rates. And the influence of jet velocity and jet flow rate on the control effect was analyzed. It was found that transverse jet is an effective method to control the thermoacoustic instability in the Rijke combustor. The control effect of the thermoacoustic instability increases linearly with the increase of the jet velocity and jet flow rate. Under the experimental case with the jet velocity of 24.00 m/s and the flow rate of 4.52 L/min, the pressure vibration amplitude reduction efficiency reaches 98.81%, accompanied by a slight vibration.

关 键 词：横向射流 Rijke 型燃烧器 热声不稳定 控制效果 

分 类 号：TK124[动力工程及工程热物理—工程热物理]