欢迎来到天天文库
浏览记录
ID:46633518
大小:3.59 MB
页数:8页
时间:2019-11-26
《LPP低污染燃烧室冷态流场与油雾特性》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第45卷第2期2013年4月南京航JoumalofNanjing空航天大学学报UniversityofAeronautics&AstronauticsLPP低污染燃烧室冷态流场与油雾特性邓远灏1’2朱嘉伟1颜应文1’2马存祥2徐华胜2张靖周(1.南京航空航天大学能源与动力学院,南京,210016;2.中国燃气涡轮研究院,成都,610500)V01.45No.2Apr.2013摘要:为了研究某贫油预混预蒸发(Leanpremixedprevaporized,LPP)低污染燃烧室冷态流场和油雾特性,本文采用粒子图像测速仪(Particleimagevelocimetry,PI
2、V)首先试验研究不同进口空气流量对燃烧室冷态流场的影响,其次分别在单开值班级喷嘴、主级喷嘴以及同开主级和值班级喷嘴时,分析了燃油流量分配和值班级喷嘴位置对燃烧室油雾特性的影响。试验结果表明:在LPP燃烧室头部流场存在中心回流区、角落回流区和唇口回流区,中心回流区宽度随着距燃烧室头部距离的增加先逐渐增加,而后逐渐减少,且进口空气流量对燃烧室回流区形状影响不大;单开值班级喷嘴时,供油量增加,燃烧室油雾特性变差;单开主级喷嘴时,主级供油量增加,燃烧室油雾特性得到改善;主级和值班级喷嘴同时打开时,随着主级供油量增加,值班级供油量减少,燃油雾化特性得到改善;值班级喷嘴位于喉道处时燃
3、油雾化效果优于值班级喷嘴在旋流器出口处。关键词:贫油预混预蒸发;低污染燃烧室;冷态流场;油雾场;粒子图像测速仪中图分类号:V231.2文献标志码:A文章编号:1005—2615(2013)02一0162一08ColdnowFjeldandFudSpraynsticofLPPLowEmi豁ionC伽Ilb吣torDP咒gYhn规^口01仙,Z^“.厂i口议肥i1,ya押yi佗gw8n1¨,^—亿C“挖zin咒g2,X“H“口s^P挖g2,.2强口以g-,i咒92^o“1(1.CollegeofEnergyandPowerEngineering,NanjingUniversi
4、tyofAeronautics&Astronautics,Nanjing,210016,China;2.ChinaGasTurbineEstablishment,Chengdu,610500,China)Abstract:Inordertostudycoldflowfieldsandfuelspraycharacteristicsofaleanpremixedprevaporized(LPP)lowemissioncombustor,effectsofdifferentinletconditionsoncoldfieldsareexperimentallyin—Vesti
5、gatedbyusingparticleimagevelocimetry(PIV),andeffectsofdifferentfuelallocationsandposi—tionsofpilotatomizeronfuelspraycharacteristicsarestudiedwhenonlypilotatomizerorprimaryat—omizerisoperated,orprimaryandpilotatomizersareoperatedatthesametime.ExperimentalresultsshowthatcentraIrecirculatio
6、nzone(CRZ),cornerrecirculationzoneandliprecirculationzoneappearinthec01dflowfield.ThewidthofCRZgraduallyincreasesfirstlyandthendecreaseswiththeincreaseofaxialdistancefromcombustorinlet.ChangesoftheCRZshapeareweakwheninletairflowrateschange.Whenonlypilotatomizeroperates,fuelspraycharacteri
7、sticisgraduallyworsenedwiththein—creaseoffuelflowrate.Whenonlyprimaryatomizeroperates,fuelspraycharacteristicisgraduallyim—provedwiththeincreaseoffuelflowrate.Whenthepilotandprimaryatomizersoperateatthesametime,spraycharacteristicisgraduallyimprovedwiththeincreaseof
此文档下载收益归作者所有