文章编号：1000-8055（2023）04-0939-10doi：10.13224/j.cnki.jasp.20210214桨扇后掠降噪规律及声学机理数值研究贺象，赵振国，舒太波，彭学敏（中国航发湖南动力机械研究所中小型航空发动机叶轮机械湖南省重点实验室，湖南株洲412002）摘要：结合三维流场数值模拟方法和声学FfowcsWilliams-Hawkings方程声类比方法，对对转桨扇流动及声学特征进行仿真分析，研究了桨叶后掠角对对转桨扇的气动性能和气动噪声的影响规律。结果表明：对转桨扇桨叶后掠角从0°增加至40°，高速巡航状态推进效率可提高接近1.5个百分点，起飞状态推进效率提升不大；桨扇噪声大小与后排桨叶吸力面压力脉动强度有直接关系，增大桨扇桨叶后掠角可明显降低压力脉动强度，从而降低起飞状态下对转桨扇整个角向范围内的噪声大小；在噪声最大的75°角向位置，后掠角从0°增至40°声压级降低达3dB以上。关键词：对转桨扇；桨叶后掠角；FfowcsWilliams-Hawkings方法；气动性能；压力脉动强度；噪声指向性中图分类号：V215.3文献标志码：ANumericalinvestigationofnoisereductionlawandacousticmecha-nismofthesweepbackpropfanHEXiang，ZHAOZhenguo，SHUTaibo，PENGXuemin（HunanKeyLaboratoryofTurbomachineryonSmallandMediumAero-Engine，HunanAviationPowerplantResearchInstitute，AeroEngineCorporationofChina，ZhuzhouHunan412002，China）Abstract:Thepropfanflow-fieldandacousticfeatureswereinvestigatedbycombiningthe3DnumericalsimulationwithFfowcsWilliams-Hawkingsequation.Andtheeffectsofpropfansweepbackangleonaerodynamicperformanceandnoiselevelwerestudied.Itindicatedthat,withpropfansweepbackangleincreasingfrom0°to40°,thethrustefficiencywaspromotedabout1.5percentagepointsatthehighspeedcruiseconditionbutslightlyatthetake-offcondition.Thepropfannoiselevelwasdirectlyrelatedtothepressurefluctuationintensityoftherearbladesuctionsurface.Withtheincreaseofsweepbackangle,thepressurefluctuationintensitydecreased,andthenthenoiselevelinallangularpositionswasreducedatthetake-offcondition.Atthe75°angularpositionwiththemaximumsoundpressurelevel,thesoundpressureleveldecreasebymorethan3dBwithpropfansweepbackangleincreasingfrom0°to40°.Keywords:contrarotatingpropfan；bladebackwardsweepangle；FfowcsWilliams...
