第48卷第1期2024年1月doi:10.11832/j.issn.1000-4858.2024.01.017摘要：应急放能源系统是飞机液压系统失效时用于飞机起落架收放的应急动力单元，但该系统存在压力脉动大导致系统不稳定等问题，严重影响飞机的运行安全。利用航空过滤器内部腔体形成压力脉动衰减器对脉动进行抑制。采用压力波声学传播理论及ComsolMultiphysics进行了有限元建模及仿真，得到过滤器腔体直径、腔体长度、入口直径、出口直径为影响过滤器传递损失的关键参数。通过实验测试，过滤器后压力脉动幅值由20.9±0.44MPa衰减至20.9±0.15MPa，衰减效果良好，增大腔体直径后脉动抑制效果进一步增强,与仿真结果一致。验证了过滤器压力脉动建模仿真方法的正确性，也为小流量液压系统过滤器设计提供了新的思路。关键词：过滤器；压力脉动；有限元法；Comsol；脉动抑制中图分类号：TH137文献标志码：B文章编号：1000-4858(2024)01-0141-09MechanismAnalysisofAttenuationofPressurePulsationinZHAOLong-chao°,ZHANGAo-xiang',YAOJing'3,YANGShuai',ZHANGQian-rui?(1.SchoolofMechanicalEngineering,YanshanUniversity,Qinhuangdao,Hebei066004;2.AvicXinxiangAviationIndustry(Group)Co.,Ltd.,Xinxiang,Henan453002;3.HebeiKeyLaboratoryofHeavyMachineryFluidPowerTransmissionandControl,YanshanUniversiy,Qinhuangdao,Hebei066004)Abstract:Theemergencyenergyreleasesystemisanemergencypowerunitusedforretractingandextendingaircraftlandinggearincaseofhydraulicsystemfailure.However,thissystemhasproblemssuchaslargepressurepulsationsandsysteminstability,whichseriouslyaffecttheoperationalsafetyoftheaircraft.Apressurepulsationattenuatorisdevelopedusingtheinternalcavityofanaviationfiltertosuppressthepressurepulsations.Finiteelementsimulationisconductedusingpressurewaveacousticpropagationtheory.Thekeyparametersaffectingthetransmissionlossofthefilteraredeterminedtobethecavitydiameter,length,inletdiameter,andoutletdiameter.Experimentaltestingshowsthatthepressurepulsationamplitudebehindthefilterisreducedfrom20.9±0.44MPato20.9±0.15MPa.Theattenuationeffectisgood.Afterincreasingthediameterofthecavity,thepulsationsuppressioneffectisfurtherenhanced,whichisconsistentwiththesimulationresults.Verifiedthecorrectnessof...
