HydraulicsPneumatics&Seals/No.3.2024doi:10.3969/j.issn.1008-0813.2024.03.012高压比大推力离心压气机流场分析刘淑军,杨一楠（河北省科技工程学校汽车与现代农业装备系，河北保定071000）摘要：基于CFD设计了一款转速60000r/min、压比7、流量1.5kg/s的大推力压气机,采用spalart-allmaras流模型和Navier-Stokes方程组对压气机叶轮内的气体流动及其工作范围进行了数值模拟，分析了60000r/min转速时最高效率点附近的相对马赫数和流线云图，开展了非设计转速下的流场分析，计算了不同转速下的工况，研究了设计转速下叶轮入口处激波和射流尾迹的流动情况。研究结果表明：设计工况条件下，等熵效率为84.25%，压比为8.167；转速从48000r/min到54000r/min时，等熵效率提高，流场改善，气动损失减小；压气机转速从60000r/min增加到72000r/min时，压气机等熵效率、气动损失减小、稳定工作范围收窄；高压叶轮的主要气动损失为叶片表面的激波损失、叶尖间隙损失、二次流损失及吸力面尾缘的低能流体。关键词：压气机；高压比；流场；分析中图分类号：TH138文献标志码：B文章编号：1008-0813(2024)03-0067-06FlowFieldAnalysisontheHighPressureRatioandHighThrustCentrifugalCompressorLIUShu-jun,YANGYi-nan(DepartmentofAutomobileandModernAgriculturalEquipment,HebeiScienceandTechnologyEngineeringSchool,Baoding071000,China)Abstract:Ahighthrustcompressorwithaspeedof60000r/min,apressureratioof7andaflowrateof1.5kg/sisdesignedbasedonCFD.Thespalart-allmarasturbulencemodelandNavier-Stokesequationsareusedtosimulatethegasflowinthecompressorimpelleranditsworkingrange.TherelativeMachnumberandstreamlinecloudnearthehighestefficiencypointat60000RPMareanalyzed.Theflowfieldanalysisunderoffdesignspeediscarriedout.Theworkingconditionsatdifferentspeedsarecalculated.Theflowcharacteristicsofshockwaveandjetwakeattheinletofimpelleratdesignspeedareanalyzed.Theresultsshowthat:Underthedesigncondition,theisentropicefficiencyis84.25%,andthepressureratiois8.167.From48000r/minto54000r/min,theisentropicefficiencyincreases,theflowfieldimprovesandtheaerodynamiclossdecreases.Whenthecompressorspeedincreasesfrom60000r/minto7200r/min,theisentropicefficiency,aerodynamiclossandstableworkingrangeofthecomp...
