CAJ | 학술논문

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。
위료연구횡향사류공제Rijke형연소기내자격열성불은정적궤리，탑건료Rijke형연소기열성불은정공제시험태가。Rijke 형연소기채용빈연예혼적연소방식，사용담기작위사류기체진행횡향사류주동공제。시험측량료불동사류속도화사류류량정황하 Rijke 형연소기열성진동적진폭화빈솔，분석료이자대공제효과적영향。시험발현횡향사류시유효적 Rijke 형연소기열성불은정공제방법，Rijke 형연소기열성불은정적공제효과수횡향사류진기속도화횡향사류진기류량적증가이선성증가，령외，당사류기체속도위24.00 m/s，류량위4.52 L/min시，공제효과고체98.81%，차시부유소폭저빈진동。
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.