某型风扇-增压级结构设计与试验研究

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1、上海交通大学硕士学位论文某型风扇/增压级结构设计与试验研究姓名：肖新红申请学位级别：硕士专业：动力工程指导教师：陈汉平;罗安阳20080501ATYPEOFFAN&BOOSTERSTRUCTUREDESIGNANDEXPERIMENTABSTRACTTheturbofanengineinvestigatedherewasdesignedtomeettheaircraftpowerplantrequirementforahighaltitudelongenduranceunmannedaerialvehicle.Thisenginewithmed

2、ium-bypassratiowasbasedonthegasgeneratorofWS,adomesticapprovalturbofanengine.Techniquesforstructuralschemedesign,structuraldesignandtestwereinvestigatedforthelowpressurecompressor,whichisakeytothewholeengine.Basedonthevariousanalysesofdifferenttypesofturbofanenginesavailable

3、athomeandabroad,twoboosterstagesschemewasproposedsoastoincreasethepressureratiointheinnerflowpathandthethrustoftheengineandtoreachgethigheraltitudebytheengine.Thefanisthecrucialelementofthefan/boosterassembleandtheapplicationoftheadvancedBlisktechniqueresultedinlighterweight

4、,fewercomponentsnumberandhigherreliabilityoftheassemble.Thestructureofthenewfan/boosterwaskeptthesameasthatoftheprototype,WS,toreducetheriskofitsdevelopment.Theinner/outerflowpathtestschemewasproposedandwascarriedouttoinvestigatetheIIaerodynamicperformanceoftheunit,duringwhi

5、chthebladeflutterandstressweremonitoredtoensuresuccessofthetest.Inordertotesttheperformanceindexofthefan/boosterassemble,thestructurewasmodifiedtomeettherequirementofmeasure.Throughtheseinvestigations,aseriesofadvanceddesignmethod,testmethodandmeasuremethodweredeveloped,appl

6、iedandvalidatedandthefan/boosterstructuredesign,testandmeasuretechniqueswereimproved.Anadvanced,reliablefan/boosterassemblewasprovidedfortheturbofanengine.KEYWORDS:Fan&BoosterStructureDesignExperimentIII符号说明B涵道比或增压级Kd轮盘安全系数T温度KL螺栓安全系数Tt0大气温度Kw附面层修正系数Л增压比η效率σsr持久强度Wa空气流量−σMax

7、Von最大当量应力Wa折合流量σr径向应力P压力Pt0大气压力σθ周向应力SM稳定工作裕度σa轴向（拉伸）应力LP低压压气机σcp平均应力HP高压压气机MT扭矩F风扇θ套齿压力角A轴流压气机，流管面积DP套齿节圆直径C离心压气机L套齿接触长度，弹支肋条长度G重量D套齿截面轴的外径ΔP压力差d套齿截面轴的内径ρ气体密度Fy预紧力Ω残余不平衡量My预紧力矩ω角速度Fa轴向力n工作转速Mω陀螺力矩−ML扭矩n相对折合转速FL拧紧力nc转子临界转速Ftemp温度引起的螺栓受力Ve不平衡偏心速度Pj剪切力W叶片叶尖进气边相对来流速度δ支承揉度b叶片叶尖弦

8、长，肋条宽度Z肋条数目，螺栓个数f叶片频率J惯性矩Vr折合速度E弹性模数Ks轴安全系数h肋条厚度Kb叶片安全系数γ绝热系数VI下标上标∏风扇第二涵道（