中文摘要：

为研究横向射流控制旋流燃烧器内自激热声不稳定的机理,搭建了旋流燃烧器热声不稳定控制试验台架,分别采用了横向射流（JICF）和横向火焰射流（JFCF）研究了空气流率为1333.3 mL/s、化学当量比为0.9、旋流强度为0.77时旋流燃烧器的热声不稳定控制作用.试验发现横向射流能够大幅度降低旋流燃烧器的热声不稳定强度,而且横向射流所占用的空气流率比例小.当横向射流空气流率比例XJICF岍为6%时.热声不稳定的有效压力振幅从1712Pa降到185Pa,降低了89.2%.另外,横向射流的控制作用远远优于横向火焰射流,横向火焰射流需要在燃料流率比例XJFCF〉50%时才能获得大于32.5%的控制效果.

英文摘要：

An laboratory facility was built to study the controlling mechanism of self-excited thermoacoustic instabili-ty in a swirl combustor based on a transverse jet.Jet in cross-flow（JICF） and jet flame in cross-flow（JFCF） were em-ployed separately to control thermoacoustic instability in a swirl combustor with a swirl number SW of 0.77.The air flow rate QOX is 1 333.3 mL/s,and the equivalence ratio φ is 0.9.The experimental resualts revealed that the intensity of thermoacoustic instability inside the swirl combustor was greatly suppressed when JICF with low ratios of airflow rates XJICF was introduced.When XJICF=6%,the effective amplitude of thermoacoustic instability decreased by 89.2% from 1 712 Pa to 185 Pa.Besides,JICF was found to be much more effective in controlling thermoacousticinstability than JFCF,and the latter can only achieve a controlling effect of 32.5% on condition that the ratio of fuel flow rate XJFCF should be greater than 50%.