第40卷第4期压力容器2023年4月doi:■■■■■■■■■■■■■■■■■■■■10.3969/j.issn.1001-4837.2023.04.001试验研究不等频率比转置三角形管束流体弹性失稳试验研究郭凯1,程雨轩1,谭蔚2,王博尧1,于美琪1,张红升1(1.燕山大学环境与化学工程学院,河北秦皇岛066004;2.天津大学化工学院,天津300350)摘要:管壳式换热器是最为常用的热交换设备,管束的流致振动问题是设计和制造关注的重点,虽然换热器的设计过程对管束流致振动问题有所要求,但是由于管束的支撑存在不对称性,造成实际工作中的管束振动问题难以准确预测。采用水洞试验,研究了节径比为1.41的不同频率比转置三角形管束的流体弹性失稳特征,对比分析了振幅、频率响应和相图特性。结果表明,当Rf<0.8时,单弹性管模型很难准确预测管束横流向失稳临界流速。随着频率比Rf的减小,横流向失稳前振动形式由混沌形式向双周期振动转化,而顺流向振动形式在失稳后,则由准周期振动向双周期振动形式转化。同时,管束顺流向可能出现超过标准的振幅,在换热器设计和运行过程中应予以关注。关键词:管壳式换热器;换热器管束;流致振动;不等刚度中图分类号:TH49;TQ051.5;O353.1文献标志码:AExperimentalstudyonfluid-elasticinstabilityofrotatedtriangulartubebundleswithunequalfrequencyratioGUOKai1,CHENGYuxuan1,TANWei2,WANGBoyao1,YUMeiqi1,ZHANGHongsheng1(1.SchoolofEnvironmentalandChemicalEngineering,YanshanUniversity,Qinhuangdao066004,China;2.SchoolofChemicalEngineeringandScience,TianjinUniversity,Tianjin300350,China)Abstract:Theshellandtubeheatexchangersarethemostcommonlyusedheatexchangeequipment,andtheflowinducedvibrationofthetubebundleisoneoftheimportantissuespuzzlingthedesignandmanufactureoftheheatexchanger.Althoughtheflowinducedvibrationofthetubebundlehasbeenconsideredduringthedesignprocessoftheheatexchanger,theactualworkofthetubebundlevibrationproblemisdifficulttopredictduetotheasymmetryofthetubebundlesupport.Thefluid-elasticinstabilityofrotatedtriangulartubebundleswithdifferentfrequencyratioandpitchdiameterratioof1.41wasstudiedbywatertunnelexperiments.TheresultsshowthatwhenRf<0.8,itisdifficultforthesingletubemodeltoaccuratelypredictthecriticalvelocityofcross...