摘要
为了研究穿孔板、背腔及射流组合下射流参数对热声不稳定抑制效果的影响,采用数值模拟方法分析了不同射流角度、射流孔径及射流孔数下燃烧室内多个监测点的振荡特性,将多个监测点的抑制能力进行综合等效,分析三者对热声不稳定抑制效果的影响。结果表明:热声不稳定受射流角度的影响最大,受射流孔数的影响最小;调节射流角度能解决因旋流器强干扰造成局部抑制效果差的问题,同时会扩大射流抑制的范围;射流孔径的等效抑制能力随孔径的增加而减小,在同类型工况中射流角度为-10°、射流孔数为6个的等效抑制能力最强。
To examine the impact of jet parameters on the suppression effect of thermoacoustic instability under the combination of perforated plate,back cavity and jet flow,numerical simulation method was used to analyze the oscillation characteristics of multiple monitoring points in the combustor under different jet angles,orifice diameters,and numbers of jet orifices.The impact of the three factors on the suppression effect of thermoacoustic instability was analyzed by equivalent suppression capacity of multiple monitoring points.The results show that the jet angle has the greatest impact on thermoacoustic instability,while the number of jet orifices has the least impact.Adjusting the jet angle can solve the problem of poor local suppression effect caused by swirler strong interference and expand the range of jet suppression.The equivalent suppression capacity of the jet orifice diameters decreases with the increase of orifice diameters,and the equivalent suppression capacity is the strongest under the same type of working condition with a jet angle of-10°and the numbers of jet orifices of 6.
作者
张力哲
刘爱虢
吴小取
李欣宇
ZHANG Lizhe;LIU Aiguo;WU Xiaoqu;LI Xinyu(School of Aero-engine,Shenyang Aerospace University,Shenyang,China,Post Code:110136)
出处
《热能动力工程》
北大核心
2025年第7期1-11,22,共12页
Journal of Engineering for Thermal Energy and Power
基金
沈阳市科技计划项目(22-322-3-30)
中航产学研合作项目(HFZL2023CXY004)。
关键词
热声不稳定
背腔
射流
等效抑制能力
thermoacoustic instability
back cavity
jet flow
equivalent suppression capacity
