悬臂圆柱在小圆柱尾流影响下开始振动时尾涡的变化.pdf

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1、⺅༛ᆖս䇪᮷ᛢ㟸഼ḧ൞ቅ഼ḧቴ⍷ᖧଃсᔶခᥥࣞᰬቴ⏗Ⲻ਎ौWAKEMODIFICATIONDURINGVIBRATIONGENERATIONOFACANTILEVERCYLINDERINLINEWITHANOTHEROFSMALLERDIAMETER䰛Ӟ૾ቊ┞ᐛѐཝᆜ2015ᒤ12ᴸഭ޵മҖ࠶㊫ਧ˖TP24ᆖṑԓ⸱˖10213ഭ䱵മҖ࠶㊫ਧ˖530ᇶ㓗˖ޜᔰᐕᆖ⺅༛ᆖս䇪᮷ᛢ㟸഼ḧ൞ቅ഼ḧቴ⍷ᖧଃсᔶခᥥࣞᰬቴ⏗Ⲻ਎ौ⺋༡⹊ガ⭕˖䰛Ӟሲᐾ˖AlamMd.Mahbubᮉᦸ⭩䈭ᆜփ˖ᐕᆖ⺅༛ᆜ〇˖ࣘ࣋ᐕ〻৺ᐕ〻✝⢙⨶ᡶ൞ঋփ˖␡⹄ウ⭏䲒ㆊ䗟ᰛᵕ˖2015ᒤ12ᴸᦾҾᆜփঋ

2、փ˖૸ቄ┘ᐕъབྷᆖClassifiedIndex:TP24U.D.C:530DissertationfortheMasterDegreeinEngineeringWAKEMODIFICATIONDURINGVIBRATIONGENERATIONOFACANTILEVERCYLINDERINLINEWITHANOTHEROFSMALLERDIAMETERCandidate:YanLiangSupervisor:Prof.AlamMd.MahbubAcademicDegreeAppliedfor:MasterofEngineeringSpecialty:PowerEngi

3、neeringandEngineeringThermalPhysicsAffiliation:ShenzhenGraduateSchoolDateofDefence:December,2015Degree-Conferring-Institution:HarbinInstituteofTechnology᪈㾱᪎㾷ᵜ䈮仈ѫ㾱⹄ウսҾк⑨ሿശḡቮ⍱ѝⲴབྷശḡⲴ⍱㠤ᥟࣘ૽ᓄˈަѝሿശḡⴤᖴѪdˈབྷശḡⴤᖴѪDDŽк⑨ശḡєㄟ൷പᇊ൘仾⍎໱䶒кˈл⑨ശḡѪᛜ㟲പᇊDŽᵜ䈮仈ѫ㾱⹄ウҶL/d=1.5ˈd/D=0.4ԕ৺L/d=1.0ˈd/D=0.6є⿽ᛵߥˈަѝLѪк⑨ശḡശᗳࡠл

4、⑨ശḡࡽ傫⛩Ⲵ䐍⿫DŽᵜ䈮仈ޡ⍻䈅Ҷл⑨ശḡⲴйњн਼ս㖞ˈ࠶࡛Ѫл⑨ശḡⲴ㠚⭡ᥟࣘㄟˈѝ䰤ս㖞ˈл⑨ശḡ䶐䘁പᇊㄟⲴṩ䜘DŽᇎ傼ѝᡁԜ࡙⭘◰⍻ᥟԚ⍻䟿Ҷл⑨ശḡⲴᥟࣘᛵߥ˗࡙⭘঻࣋ᢛ᧿䰰⍻䟿Ҷл⑨ശḡⲴਇ࣋ᛵߥԕ৺࡙⭘PIV㌫㔏⍻䟿Ҷл⑨ശḡቮ⏑ⲴਈॆᛵߥDŽ൘є⿽ᛵߥѝˈл⑨ശḡ䜭ਁ⭏Ҷᕪ⛸Ⲵᥟࣘ˄傠ᥟ˅DŽ⹄ウਁ⧠аᰖശḡᔰ࿻ᥟࣘˈᥟᑵ䲿⵰ᰐ䟿㓢ॆᶕ⍱䙏ᓖUr໎བྷ㘼䗵䙏кॷˈ䘉ᱟ⭡Ҿᖃ䙏ᓖਈॆᰦˈॷ࣋໎བྷˈሩശḡڊ࣏㜭࣋໎བྷˈণEf໎བྷˈ൘ަ໎བྷⲴ䗷〻ѝˈWfབྷҾശḡ㌫㔏䱫ቬᦏཡⲴ㜭䟿ণ䱫ቬᡰڊⲴ䍏࣏Edˈণ⍱փ൘ੁᥟࣘശḡᨀ׋㜭䟿ˈᒦ䖜ॆѪᵪỠ㜭DŽഐ↔䲿⵰仾䙏Ⲵ໎࣐㜭

5、䟿䙀⑀Ր䙂ࡠശḡ㌫㔏ˈަ㺘⧠Ѫശḡᥟᑵ䙀⑀໎བྷDŽᵜ䈮仈࡙⭘POD࠶᷀㧧ਆҶл⑨ശḡቮ⍱ⲴਁኅਈॆᛵߥDŽ࡙⭘ᘛ䙏ڵ・ਦਈᦒ࠶᷀PODվ䱦⁑ᘱⲴᰦ䰤ᒿࡇˈަ㔃᷌㺘᰾н਼Ⲵ⍱ࣘ㔃ᶴሩᓄн਼Ⲵ仁䉡ጠ٬DŽᖃл⑨ശḡⲴєㄟ൷പᇊ൘仾⍎໱䶒кᰦˈ⁑ᘱ1о⁑ᘱ2Ⲵ仁䉡ጠ٬൷ㅹҾл⑨ശḡⲴ⏑㝡仁⦷ˈ㘼ަᆳབྷҾ2䱦Ⲵ⁑ᘱ⋑ᴹ᰾ᱮⲴ仁䉡ጠ٬DŽᖃл⑨ശḡ㠚⭡ᥟࣘᰦˈ⁑ᘱ1Ⲵ仁䉡ጠ٬ㅹҾл⑨ശḡⲴപᴹ仁⦷ᡆ㘵оപᴹ仁⦷੸仁ޣ㌫DŽ⁑ᘱ2о⁑ᘱ3Ⲵ仁䉡ጠ٬о⏑㝡仁⦷⴨਼DŽབྷҾഋ䱦Ⲵ儈䱦⁑ᘱ⋑ᴹ᰾ᱮⲴ仁䉡ጠ٬DŽީ䭤ᆍ˖ᛜ㟲ശḡ˗⍱㠤ᥟࣘ˗⏑㝡仁⦷˗㜭䟿䖜ᦒ˗POD࠶᷀IAbstractABSTRAC

6、TThisthesispresentedthecross-flowinducedresponseofacantilevercylinder(diameterD)inlinewithanotherofsmallerrigidcylinderofdiameterd.Therearemainlytwocasesinthisthesis,inwhichthediameterratiod/Dis0.4and0.6,thecylinderspacingL/dis1.5and1.0respectively,inwhichListhelinedistancebetweenthecen

7、tersoftheupstreamcylinderandtheforwardstagnationpointofthedownstreamcylinder.Thevibrationmotionandthepressuresaroundthevibratingcylinderweremeasuredbylaservibratorandpressurescannerrespectively.Inaddition,IhadcapturedthephotoofthewakebymeansofPIV.Alateralviolentvibrationofthedo