ChineseJournalofTurbomachineryEffectofNon-uniformFilletonLeakageFlowandNoiseofSemi-openAxialFlowFanBladeTip*Si-teHu1Qing-mingCao1,*Yue-feiLi2Long-xinZhang1Xiao-wenHu1PengChen1(1.CorporateResearchCenter,MideaGROUP;2.GuangdongMideaHeatingandVentilatingEquipmentCo.,Ltd.)Abstract:Utilizingacombinedapproachofnumericalsimulationsandexperimentalinvestigations,thepresentstudyaimedtoinvestigatethecontrolmechanismofthetipleakageflowonasemi-openaxialflowfan,particularlyfocusingontheeffectofthenon-uniformfilletstructureonthepressureside,anditsinfluenceontheaerodynamicandnoiseperformanceofthefan.Thestudysuggeststhatthenon-uniformfilletstructureonthebladetippressuresidecaneffectivelyalleviatetheseparationvortexandsecondaryvortexonthetip,thusreducingthebladetiploading.Additionally,itcanalsomodifytheseparationpointofthebladetipleakagevortexonthesuctionside,leadingtoadecreaseinthestrengthofthevortexandsubsequentlyreducingnoisebyupto0.8dB(A)ataconstantairflowrate.Meanwhile,itsimpactonairflowandpowerisnegligible.Keywords:BladeTip;PressureSide;Non-uniformFillet;TipLeakageFlow摘要:采用数值仿真和实验结合的方法研究了半开式轴流风机叶顶压力面非均匀倒圆结构对叶顶泄漏流动的控制机理,以及对气动和噪声性能的影响。研究结果表明,叶顶压力面侧非均匀倒圆结构能够减弱叶顶的分离涡和二次涡,降低叶顶载荷,改变叶顶泄漏涡在吸力面的分离点,削弱叶顶泄漏涡强度,实现同风量噪声下降0.8dB(A),而对风量和功率的影响可忽略。关键词:叶顶;压力面;非均匀倒圆;叶顶泄漏涡中图分类号:TH432.1;TK05文章编号:1006-8155-(2023)03-0054-05文献标志码:ADOI:10.16492/j.fjjs.2023.03.0009胡斯特1曹庆明1,*李跃飞2张龙新1胡小文1陈鹏1(1.美的集团中央研究院;2.广东美的暖通设备有限公司)半开式轴流风机叶顶非均匀倒圆对泄漏流和噪声的影响**基金项目:中国博士后基金(2021M701542)*通讯作者:曹庆明,caoqm@midea.com0引言随着人们生活水平的提高,空调制冷系统和热泵系统越来越广泛的被人们使用,空气源热泵具有较广的运行范围、适应更低温制热等优点,加上当前能源价格高涨,激发欧洲各国加速转向使用热泵产品。随着全球气候变暖和世界各国对绿色低碳产品的...