基于泄流槽的可变形开式空腔噪声抑制方法研究

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中图分类号：TB53 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202412022

Abstract：Anoisesupressionmetodfordefomableopencavitybasedoadrainchelisproposdaseriesdrainchanelisdsignedon thebackwallfityndtaoaefteotoplatedeackallofavicahagdhtheagofflow ratethroughtheactuatorsoastoaevteotialefectofcavityoisesupressonuderdierentfloates.Telargeedysiulati combinedwitputatialocoutisplodforicalllaioflvityItiodttl presurelevelandthemainmodalsound presurelevelofthecavitynoise wouldbothdecreaseastheinclinationangleoftheback wal θ （ changed， and the decrease amplitude would increase as θ increased， showing a positive correlation.Furthermore， the modal frequency of the cavitynoisewouldshiftsignfcantlytolowerfrequences.Teresultssowthatteoissuppessonmehodfodeformableavityasedon draichanelcansignificantlyeducetheoverallsoudpresueevelandthemainmodalsoundpressurelevelofavitynoise，andatthesame time，makethmanmodalfrequencyovesignificantly，whichcanffectivelyavoidtecavitytructureandtheequipmentistalediside the cavity vibration and acoustic fatigue damage.

Keywords：noise suppression; drain channel;cavity noise;large eddge simulation; overall sound pressure level

随着现代战争技术形态的发展，武器内埋已成为先进飞行器提高作战效能必须采用的技术途径。（剩余13136字）