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刘应征

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期刊论文

Nonlinear analysisoforbitalmotionofarotorsubjectto leakage airflowthroughaninterlockingseal

刘应征W.Z. Wanga Y.Z.Liua G.Mengb P.N.Jiangc

Journal of Fluidsand Structures25(2009)751-765,-0001,():

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摘要/描述

A nonlinearmathematicalmodelfororbitalmotionoftherotorundertheinfluenceofleakageflowthrougha labyrinth ealwasestablishedinthepresentstudy.Aninterlockingsealwaschosenforstudy.Therotor–sealsystemwas modeled asaJeffcotrotorsubjecttoaerodynamicforcinginducedbytheleakageflow.Particularattentionwasplaced on theserpentineflowpathbyspatiallyseparatingtheaerodynamicforceontherotorsurfaceintotwoparts,e.g.,the seal clearanceandthecavityvolume.Spatio-temporalvariationoftheaerodynamicforceontherotorsurfaceinthe coverage ofthesealclearanceandthecavityvolumewasdelineatedbyusingtheMuzynskamodelandperturbation analysis, respectively.Thegoverningequationofrotordynamics,whichwasincorporatedwiththeaerodynamicforce integrated zverallsealclearancesandcavityvolumes,wassolvedbyusingthefourth-orderRunge–Kuttamethodto obtain theorbitofthewhirlingrotor.StabilityoftherotatingrotorwasinspectedusingtheLiapunovfirstmethod. The resultsconvincinglydemonstratethatthedestabilizationspeedoftherotorwasreducedduetotheaerodynamic force inducedbytheleakageflowthroughtheinterlockingseal.Thenonlinearanalysismethodproposedinthepresent study isreadilyappliedtodynamicsofvariousrotor–sealsystemswithlabyrinthseals.

版权说明:以下全部内容由刘应征上传于   2011年05月13日 11时15分47秒,版权归本人所有。

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