文章编号:1000-8055(2023)04-0986-08doi:10.13224/j.cnki.jasp.20210461航空发动机叶片进排气边缘形状自动评价方法陈雷1,李大力1,王婧雯2,3,张旭2(1.中国航发沈阳黎明航空发动机有限责任公司,沈阳110043;2.华中科技大学无锡研究院,江苏无锡214174;3.上海大学机电工程与自动化学院,上海200444)摘要:针对目前对航空发动机叶片进排气边缘形状的评价主要依赖人工目测,主观性强、效率低等问题。提出一种叶片进排气边缘形状自动评价方法,通过非均匀有理B样条(NURBS)曲线拟合、最小二乘椭圆拟合、等半径法等算法拟合叶型并提取相关型面参数,针对5类叶片进排气边缘不合格形状给出了定性的定义,根据叶片进排气边缘在不同形状时的曲率特征以及偏差值变化特征对其形状做出评价。通过实例验证表明:该方法能够实现对尖头、钝头、歪头、缩颈及大小大/小大小(LSL/SLS)5类叶片进排气边缘形状的自动判读,对于不同叶片型号和验收标准的应用场景具有较好的通用性,有效提高了叶片进排气边缘形状评价的效率。关键词:进排气边缘;形状评价;叶型参数;特征提取;等半径法中图分类号:V263.1+4;TB9文献标志码:AAutomaticshapeevaluationmethodofaeroenginebladeinletandexhaustedgesCHENLei1,LIDali1,WANGJingwen2,3,ZHANGXu2(1.ShenyangLimingAeroEngineCorporationLimited,AeroEngineCorporationofChina,Shenyang110043,China;2.WuxiResearchInstitute,HuazhongUniversityofScienceandTechnology,WuxiJiangsu214174,China;3.SchoolofMechatronicEngineeringandAutomation,ShanghaiUniversity,Shanghai200444,China)Abstract:Atpresent,theevaluationofbladeinletandexhaustedgeshapemainlyreliesonmanualvisualinspection,whichhastheproblemsofstrongsubjectivityandlowdetectionefficiency.Anautomaticevaluationmethodofbladeinletandexhaustedgeshapewasproposed.Thebladeprofilewasfittedandtherelevantprofileparameterswereextractedbynon-uniformrationalB-splines(NURBS)curvefitting,leastsquareellipticfittingandequalradiusmethod.Aqualitativedefinitionwasgivenfortheunqualifiedshapesoffivetypesofbladeinletandexhaustedge.Theshapeofthebladewasevaluatedaccordingtothecurvaturecharacteristicsofthebladeinletandexhaustedgesindifferentshapesandthevariationcharacteristicsofdeviationvalu...