文章编号:1000-8055(2023)04-0870-08doi:10.13224/j.cnki.jasp.20210506基于LIBS研究丙烷层流预混火焰温度和当量比的空间分布刘新,王朝君,胡二江,殷阁媛,黄佐华(西安交通大学动力工程多相流国家重点实验室,西安710049)摘要:激光诱导击穿光谱(LIBS)是监测燃烧过程关键参数的重要手段之一。为此搭建了LIBS三维可移动实验测量平台,结合等离子体能量和光谱研究了丙烷层流预混火焰的空间结构,得到了不同当量比和不同高度的温度趋势和当量比空间分布。结果表明:本生灯火焰预混燃烧区厚度随高度增加而增加;H、N、O的谱线强度和等离子体能量变化趋势一致,说明粒子体积分数是影响等离子体能量的主因。通过标定H656和N746的谱线强度比值与当量比的关系得到了局部当量比的空间分布。关键词:丙烷;本生灯;预混火焰;激光诱导击穿光谱;温度;当量比中图分类号:V233.3;TK401文献标志码:ASpatialdistributionofpropanelaminarpre-mixedflametemperatureandequivalenceratiobasedonLIBSLIUXin,WANGChaojun,HUErjiang,YINGeyuan,HUANGZuohua(StateKeyLaboratoryofMultiphaseFlowinPowerEngineering,Xi’anJiaotongUniversity,Xi’an710049,China)Abstract:Laserinducedbreakdownspectroscopy(LIBS)isoneoftheimportantmeanstomonitorthekeyparametersofcombustionprocess.Athree-dimensionalmovableexperimentalmeasurementplatformofLIBSwasbuilt,thenthespatialstructureofpropanelaminarpremixedflamewasstudiedbycombiningplasmaenergyandspectroscopy,andthetemperaturetrendsandequivalenceratiospatialdistributionswithdifferentequivalenceratiosandheightswereobtained.TheresultsshowedthatthethicknessofpremixedcombustionzoneofBunsenflameincreasedwiththeincreaseofheight,andthespectrallineintensityofH,NandOwasconsistentwiththechangetrendofplasmaenergy,indicatingthattheparticlevolumefractionisthemainfactoraffectingplasmaenergy.ThenthespatialdistributionoflocalequivalentratiowasobtainedbycalibratingtherelationshipbetweenH656/N746andequivalenceratio.Keywords:propane;Bunsenburner;premixedflame;laserinducedbreakdownspectroscopy;temperature;equivalenceratio燃烧在航空发动机、燃气轮机和内燃机等燃烧室中是一个重要过程[1-2]。为了正确评价这些燃烧室的性能,必须在线测量...