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Ka lebaka la litšenyehelo tsa ts'ebetso le nako e telele ea enjene, leano le nepahetseng la taolo ea mocheso oa enjene le bohlokoa haholo.Sengoliloeng sena se thehile leano la taolo ea mocheso bakeng sa li-motors tsa induction ho fana ka nako e telele le ho ntlafatsa ts'ebetso.Ho phaella moo, ho ile ha etsoa tlhahlobo e pharaletseng ea lingoliloeng tse mabapi le mekhoa ea ho pholisa enjene.E le sephetho se ka sehloohong, ho baloa ha mocheso oa motlakase oa moea o nang le matla a phahameng a asynchronous ho fanoa, ho nahanoa ka bothata bo tsebahalang ba kabo ea mocheso.Ho phaella moo, thuto ena e fana ka mokhoa o kopanetsoeng o nang le mekhoa e 'meli kapa ho feta ea ho pholisa ho finyella litlhoko tsa hona joale.Boithuto ba lipalo ba mohlala oa 100 kW moea o pholileng oa asynchronous motor le mohlala o ntlafalitsoeng oa taolo ea mocheso oa enjene e le 'ngoe, moo keketseho e kholo ea ts'ebetso ea makoloi e fihlellehang ka ho kopanya moea o pholileng le sistimi e kopaneng ea ho futhumatsa metsi. e entsoe.Sistimi e kopaneng ea moea o pholileng le e pholileng ka metsi e ile ea ithutoa ho sebelisoa liphetolelo tsa SolidWorks 2017 le ANSYS Fluent 2021.Liphallo tse tharo tse fapaneng tsa metsi (5 L / min, 10 L / min, le 15 L / min) li ile tsa hlahlojoa khahlanong le li-motors tse tloaelehileng tsa moea tse pholileng 'me tsa netefatsoa ho sebelisa mehloli e fumanehang e hatisitsoeng.Tlhahlobo e bontša hore bakeng sa litekanyetso tse fapaneng tsa phallo (5 L / min, 10 L / min le 15 L / min ka ho latellana) re fumane ho fokotsa mocheso o tšoanang oa 2.94%, 4.79% le 7.69%.Ka hona, liphetho li bonts'a hore enjene ea induction e kentsoeng e ka fokotsa mocheso hantle ha e bapisoa le mochini o kenang moeeng o pholileng.
Enjene ea motlakase ke e 'ngoe ea liqapi tsa bohlokoa tsa mahlale a morao-rao a boenjiniere.Lienjene tsa motlakase li sebelisoa nthong e 'ngoe le e 'ngoe ho tloha lisebelisoa tsa ntlo ho ea likoloing, ho kenyelletsa le indasteri ea likoloi le ea lifofane.Lilemong tsa morao tjena, botumo ba li-motor induction (AM) bo eketsehile ka lebaka la torque ea bona e phahameng ea ho qala, taolo e ntle ea lebelo le matla a mangata a mangata (setšoantšo sa 1).Li-motors tsa induction ha li etse feela hore li-bulbs tsa hau li khanye, li matlafatsa boholo ba lisebelisoa tse ka tlung ea hau, ho tloha borasheng ba meno ho ea ho Tesla ea hau.Matla a mechine ho IM a entsoe ke ho kopana ha matla a khoheli a stator le rotor windings.Ho feta moo, IM ke khetho e sebetsang ka lebaka la phepelo e fokolang ea litšepe tsa lefatše tse sa tloaelehang.Leha ho le joalo, bothata bo ka sehloohong ba li-AD ke hore bophelo ba tsona le bokhoni ba tsona bo natefeloa haholo ke mocheso.Li-motors tsa induction li sebelisa hoo e ka bang 40% ea motlakase oa lefats'e, e leng se lokelang ho etsa hore re nahane hore ho laola tšebeliso ea matla a mechine ena ho bohlokoa.
Arrhenius equation e bolela hore bakeng sa ho phahama ho hong le ho hong ho 10°C mochesong o sebetsang, bophelo ba enjene eohle bo fokotseha ka halofo.Ka hona, ho netefatsa ho tšepahala le ho eketsa tlhahiso ea mochine, hoa hlokahala ho ela hloko taolo ea mocheso oa khatello ea mali.Nakong e fetileng, tlhahlobo ea mocheso e 'nile ea hlokomolohuoa' me baqapi ba likoloi ba 'nile ba nahana ka bothata feela ka periphery, ho itšetlehile ka phihlelo ea moralo kapa mefuta e meng ea mefuta-futa e kang ea maqhubu a hona joale, joalo-joalo. maemo a futhumatsang a nyeoe, a bakang keketseho ea boholo ba mochine mme ka hona ho eketseha ha litšenyehelo.
Ho na le mefuta e 'meli ea tlhahlobo ea mocheso: tlhahlobo ea potoloho ea lumped le mekhoa ea lipalo.Molemo o ka sehloohong oa mekhoa ea ho hlahloba ke bokhoni ba ho etsa lipalo ka potlako le ka nepo.Leha ho le joalo, ho tlameha ho etsoe boiteko bo matla ba ho hlalosa lipotoloho tse nepahetseng ka ho lekaneng ho etsisa litsela tsa mocheso.Ka lehlakoreng le leng, mekhoa ea lipalo e batla e arotsoe ka computational fluid dynamics (CFD) le structural thermal analysis (STA), tseo ka bobeli li sebelisang finite element analysis (FEA).Molemo oa ho hlahloba lipalo ke hore o u lumella ho etsa mohlala oa geometry ea sesebelisoa.Leha ho le joalo, ho seta sistimi le lipalo ka linako tse ling ho ka ba thata.Lingoloa tsa mahlale tse tšohliloeng ka tlase ke mehlala e khethiloeng ea tlhahlobo ea mocheso le motlakase oa li-motor tse fapaneng tsa sejoale-joale.Lingoliloeng tsena li khothalelitse bangoli ho ithuta liketsahalo tsa mocheso ka li-motor tsa asynchronous le mekhoa ea ho pholisa ha tsona.
Pil-Wan Han1 o ne a etsa tlhahlobo ea mocheso le motlakase oa MI.Mokhoa oa tlhahlobo ea potoloho ea lumped o sebelisoa bakeng sa tlhahlobo ea mocheso, 'me mokhoa o fapaneng oa nako oa "magnetic finite element" o sebelisoa bakeng sa tlhahlobo ea motlakase.E le ho fana ka ts'ireletso ea mocheso oa mocheso ka mokhoa o nepahetseng ts'ebetsong leha e le efe ea indasteri, mocheso oa stator winding o tlameha ho hakanngoa ka botšepehi.Ahmed et al.2 o ile a etsa tlhahiso ea mokhoa o phahameng oa mocheso oa marang-rang oa mocheso o thehiloeng menahanong e tebileng ea mocheso le thermodynamic.Nts'etsopele ea mekhoa ea ho etsa mohlala oa mocheso bakeng sa merero ea ts'ireletso ea mocheso oa indasteri e rua molemo ho tsoa ho litharollo tsa tlhahlobo le ho nahanela maemo a mocheso.
Nair et al.3 ba sebelisitse tlhahlobo e kopaneng ea 39 kW IM le tlhahlobo ea 3D ea lipalo tsa mocheso ho bolela esale pele kabo ea mocheso mochining oa motlakase.Ying et al.4 ba hlahlobile li-IM tsa fan-cooled ka botlalo (TEFC) tse nang le khakanyo ea mocheso oa 3D.Khoeli et al.5 e ithutile thepa ea phallo ea mocheso ea IM TEFC e sebelisa CFD.Moetso oa phetoho ea enjene ea LPTN o fanoe ke Todd et al.6.Lintlha tsa mocheso oa liteko li sebelisoa hammoho le lithempereichara tse baliloeng tse nkiloeng mofuteng o reriloeng oa LPTN.Peter et al.7 o sebelisitse CFD ho ithuta phallo ea moea e amang boitšoaro ba mocheso oa likoloi tsa motlakase.
Cabral et al8 o ile a etsa tlhahiso ea mofuta o bonolo oa IM oa mocheso oo mocheso oa mochini o ileng oa fumanoa ka ho sebelisa cylinder heat diffusion equation.Nategh et al.9 o ile a ithuta mochine oa motlakase oa ho hula moea o ikemetseng o sebelisa CFD ho lekola ho nepahala ha likarolo tse ntlafalitsoeng.Kahoo, lithuto tsa lipalo le tsa liteko li ka sebelisoa ho etsisa tlhahlobo ea mocheso oa li-motors tsa induction, bona feiga.2.
Yinye et al.10 ba ile ba etsa tlhahiso ea moralo oa ho ntlafatsa tsamaiso ea mocheso ka ho sebelisa thepa e tloaelehileng ea mocheso oa thepa e tloaelehileng le mehloli e tloaelehileng ea tahlehelo ea karolo ea mochine.Marco et al.11 ba hlahisitse mekhoa ea ho rala lisebelisoa tsa ho pholisa le libaki tsa metsi bakeng sa likarolo tsa mochini o sebelisang mefuta ea CFD le LPTN.Yaohui et al.12 e fana ka litataiso tse fapaneng bakeng sa ho khetha mokhoa o nepahetseng oa ho pholisa le ho lekola ts'ebetso pele ho ts'ebetso ea moralo.Nell et al.13 ba khothalelitse ho sebelisa mehlala bakeng sa ketsiso e kopantsoeng ea makenete ea motlakase bakeng sa mefuta e fapaneng ea boleng, boemo ba lintlha le matla a khomphutha bakeng sa bothata ba fisiks e ngata.Jean et al.14 le Kim et al.15 ba ile ba ithuta kabo ea mocheso oa mochine o kenang moeeng o pholileng o sebelisa sebaka sa 3D se kopantsoeng sa FEM.Bala lintlha tse kentsoeng u sebelisa 3D eddy tlhahlobo ea hona joale ea tšimo ho fumana tahlehelo ea Joule le ho e sebelisa bakeng sa tlhahlobo ea mocheso.
Michel et al.16 ba ile ba bapisa balateli ba tloaelehileng ba pholileng ba centrifugal le libapali tsa axial tsa meralo e fapaneng ka lipapiso le liteko.E 'ngoe ea meralo ena e fihletse lintlafatso tse nyane empa tse kholo ts'ebetsong ea enjene ha e ntse e boloka mocheso o ts'oanang oa ts'ebetso.
Lu et al.17 ba sebelisitse mokhoa o lekanang oa potoloho ea makenete hammoho le mohlala oa Boglietti ho hakanya tahlehelo ea tšepe mokokotlong oa enjene ea induction.Bangoli ba nka hore ho ajoa ha matla a khoheli a khoheli karolong efe kapa efe ea sefapano ka har'a mochini oa spindle ke junifomo.Ba ile ba bapisa mokhoa oa bona le liphetho tsa tlhahlobo ea lintlha tse fokolang le mehlala ea liteko.Mokhoa ona o ka sebelisoa bakeng sa tlhahlobo e hlakileng ea MI, empa ho nepahala ha eona ho lekanyelitsoe.
18 e fana ka mekhoa e fapaneng ea ho sekaseka lebala la motlakase oa li-motors tsa linear induction.Har'a tsona, ho hlalositsoe mekhoa ea ho lekanya tahlehelo ea matla liporong tse sebetsang le mekhoa ea ho bolela esale pele ho phahama ha mocheso oa li-motors tsa traction linear induction.Mekhoa ena e ka sebelisoa ho ntlafatsa ts'ebetso ea phetolo ea matla ea li-motor induction linear.
Zabdur et al.19 e ile ea batlisisa ts'ebetso ea lijase tse pholileng li sebelisa mokhoa oa linomoro tse tharo.Baki ea ho pholisa e sebelisa metsi e le mohloli o ka sehloohong oa pholiso bakeng sa IM ea mekhahlelo e meraro, e leng ea bohlokoa bakeng sa matla le mocheso o phahameng o hlokahalang bakeng sa ho pompa.Rippel et al.20 ba na le tokelo ea ho ba le mokhoa o mocha oa ho pholisa mokelikeli o bitsoang transverse laminated cooling, moo sehatsetsi se phallang ka tsela e tšesaane ho pholletsa le libaka tse moqotetsane tse entsoeng ke masoba ho tse ling tsa matla a khoheli.Deriszade et al.21 ka liteko e ile ea etsa lipatlisiso tsa ho pholisa ha li-motors tsa traction indastering ea likoloi li sebelisa motsoako oa ethylene glycol le metsi.Lekola tšebetso ea metsoako e fapaneng ka tlhahlobo ea CFD le 3D turbulent fluid.Phuputso e entsoeng ke Boopathi et al.22 e bontšitse hore mocheso oa mocheso oa lienjineri tse pholileng ka metsi (17-124 ° C) o monyenyane haholo ho feta oa lienjiniere tse pholileng moeeng (104-250 ° C).Mocheso o moholo oa motlakase oa metsi a pholileng a aluminium o fokotsehile ka 50.4%, 'me mocheso o moholo oa PA6GF30 oa motlakase o pholileng oa metsi o fokotsehile ka 48.4%.Bezukov et al.23 ba ile ba lekola phello ea sebopeho sa sekala ho conductivity ea mocheso oa lebota la enjene ka sistimi ea ho pholisa metsi.Liphuputso li bontšitse hore filimi ea 1.5 mm thick oxide e fokotsa mocheso oa mocheso ka 30%, e eketsa tšebeliso ea mafura le ho fokotsa matla a enjene.
Tanguy et al.24 ba ile ba etsa liteko ka likhahla tse fapaneng tsa phallo, mocheso oa oli, lebelo la ho potoloha le mekhoa ea ente bakeng sa li-motors tsa motlakase tse sebelisang oli e tlotsang joalo ka sepholi.Kamano e matla e thehiloe pakeng tsa sekhahla sa phallo le katleho ea ho pholisa ka kakaretso.Ha et al.25 ba khothalelitse ho sebelisa li-nozzles tse rothang joalo ka li-nozzles ho abela filimi ea oli ka mokhoa o ts'oanang le ho eketsa matla a ho pholisa enjene.
Nandi et al.26 ba ile ba hlahloba phello ea liphaephe tsa mocheso tse bataletseng tse sebōpeho sa L mabapi le ts'ebetso ea enjene le tsamaiso ea mocheso.Karolo ea evaporator ea phala ea mocheso e kenngoa ka har'a casing ea koloi kapa e patoa ka mochine oa motlakase, 'me karolo ea condenser e kenngoa le ho pholile ka ho potoloha mokelikeli kapa moea.Bellettre et al.27 o ithutile mokhoa oa ho pholisa o tiileng oa mokelikeli oa PCM bakeng sa stator ea motlakase ea nakoana.PCM e kenya lihlooho tse tsoelipanang, e theola mocheso oa sebaka se chesang ka ho boloka matla a futhumetseng a futhumetseng.
Ka hona, ts'ebetso ea motlakase le mocheso li hlahlojoa ho sebelisoa mekhoa e fapaneng ea ho pholisa, bona feiga.3. Lipotoloho tsena tse pholileng li etselitsoe ho laola mocheso oa li-winding, lipoleiti, lihlooho tse tsoelipanang, li-magnets, setopo le lipoleiti tsa ho qetela.
Lisebelisoa tsa ho pholisa metsi li tsebahala ka ho fetisa mocheso o sebetsang hantle.Leha ho le joalo, ho pompa sepholi ho potoloha enjene ho ja matla a mangata, e leng ho fokotsang matla a matla a enjene.Ka lehlakoreng le leng, mekhoa ea ho pholisa moea ke mokhoa o sebelisoang haholo ka lebaka la theko e tlaase le boiketlo ba ho ntlafatsa.Leha ho le joalo, e ntse e sa sebetse hantle ho feta mekhoa ea ho pholisa metsi.Ho hlokahala mokhoa o kopanetsoeng o ka kopanyang ts'ebetso e phahameng ea mocheso oa mocheso oa tsamaiso ea metsi a pholileng ka theko e tlaase ea tsamaiso e pholileng ea moea ntle le ho sebelisa matla a eketsehileng.
Sengoliloeng sena se thathamisa le ho sekaseka tahlehelo ea mocheso ho AD.Mokhoa oa bothata bona, hammoho le ho futhumatsa le ho pholisa ha li-motors tsa induction, li hlalositsoe karolong ea Tahlehelo ea Mocheso ho Induction Motors ka Mekhoa ea ho Pholisa.Tahlehelo ea mocheso ea mantlha ea enjene ea induction e fetoloa mocheso.Ka hona, sehlooho sena se tšohla mokhoa oa ho fetisa mocheso ka har'a enjene ka ho khanna le ho qobelloa ho tsamaisoa.Ho tlalehoa mohlala oa mocheso oa IM o sebelisang continuity equations, Navier-Stokes/momentum equations le energy equations.Bafuputsi ba ile ba etsa lipatlisiso le lipalo tsa mocheso oa IM ho hakanya mocheso oa li-winding tsa stator ka morero o le mong feela oa ho laola puso ea mocheso oa motlakase oa motlakase.Sengoliloeng sena se tsepamisitse maikutlo tlhahlobisong ea mocheso oa li-IM tse pholileng moeeng le tlhahlobo ea mocheso oa li-IM tse kopantsoeng tse pholileng le tse pholileng ka metsi tse sebelisang mohlala oa CAD le ANSYS ketsiso e thellang.'Me melemo ea mocheso ea mokhoa o kopantsoeng o ntlafetseng oa mekhoa e pholileng ea moea le ea metsi e pholileng e hlahlojoa ka botebo.Joalokaha ho boletsoe ka holimo, litokomane tse thathamisitsoeng mona ha se kakaretso ea boemo ba bonono lefapheng la liketsahalo tsa mocheso le ho pholisa li-motors tsa induction, empa li bontša mathata a mangata a lokelang ho rarolloa e le ho netefatsa ts'ebetso e tšepahalang ea li-motor induction. .
Hangata tahlehelo ea mocheso e arotsoe ka tahlehelo ea koporo, tahlehelo ea tšepe le ho ferekana / tahlehelo ea mochini.
Litahlehelo tsa koporo ke phello ea ho futhumala ha Joule ka lebaka la ho hanyetsa ha conductor mme e ka hlalosoa e le 10.28:
moo q̇g e leng mocheso o hlahisoang, 'na le Ve ke hona joale le motlakase, ka ho latellana,' me Re ke khanyetso ea koporo.
Tahlehelo ea tšepe, eo hape e tsejoang e le tahlehelo ea parasitic, ke mofuta oa bobeli oa tahlehelo e bakang hysteresis le tahlehelo ea hona joale ea eddy ho AM, haholo-holo e bakoang ke matla a khoheli a feto-fetohang a nako.Li lekantsoe ke equation e atolositsoeng ea Steinmetz, eo li-coefficients tsa eona li ka nkoang li le teng kapa li fetoha ho itšetlehile ka maemo a ts'ebetso10,28,29.
moo Khn e leng ntlha ea tahlehelo ea hysteresis e nkiloeng ho setšoantšo sa tahlehelo ea mantlha, Ken ke eddy ea tahlehelo ea hona joale ea tahlehelo, N ke index ea harmonic, Bn le f ke tlhōrō ea maqhubu a sekhahla le makhetlo a mangata a se nang sinusoidal excitation, ka ho latellana.Equation e kaholimo e ka nolofatsoa hape ka tsela e latelang10,29:
Har'a bona, K1 le K2 ke sesosa sa tahlehelo ea mantlha le tahlehelo ea hona joale ea eddy (qec), tahlehelo ea hysteresis (qh), le tahlehelo e feteletseng (qex), ka ho latellana.
Litahlehelo tsa moea le tahlehelo ea likhohlano ke lisosa tse peli tse kholo tsa tahlehelo ea mochini ho IM.Litahlehelo tsa moea le likhohlano ke 10,
Ka foromo, n ke lebelo la ho potoloha, Kfb ke coefficient ea tahlehelo ea likhohlano, D ke bophara bo ka ntle ba rotor, l ke bolelele ba rotor, G ke boima ba rotor 10.
Mokhoa oa mantlha oa phetisetso ea mocheso ka har'a enjene ke ka conduction le ho futhumatsa ka hare, joalo ka ha ho khethoa ke Poisson equation30 e sebelisitsoeng mohlala ona:
Nakong ea ts'ebetso, ka mor'a nako e itseng ha motlakase o fihla boemong bo tsitsitseng, mocheso o hlahisoang o ka baloa ka ho futhumala ho sa khaotseng ha mocheso oa mocheso oa holim'a metsi.Ka hona, ho ka nkoa hore conduction ka hare ho enjene e etsoa ka ho lokolloa ha mocheso o ka hare.
Ho fetisa mocheso pakeng tsa mapheoana le sepakapaka se potolohileng ho nkoa e le convection e qobelloang, ha mokelikeli o qobelloa ho tsamaea ka tsela e itseng ke matla a ka ntle.Convection e ka hlalosoa e le 30:
moo h e leng mocheso o fetisang mocheso (W / m2 K), A ke sebaka se ka holimo, 'me ΔT ke phapang ea mocheso pakeng tsa mocheso oa mocheso le sehatsetsing se pota-potileng holimo.Nomoro ea Nusselt (Nu) ke tekanyo ea karo-karolelano ea mocheso oa convective le conductive mocheso perpendicular ho moeli 'me o khethoa ho latela litšobotsi tsa phallo ea laminar le moferefere.Ho latela mokhoa oa matla, palo ea Nusselt ea phallo ea moferefere hangata e amahanngoa le nomoro ea Reynolds le nomoro ea Prandtl, e hlahisoang e le 30:
moo h e leng palo e fetisang ea mocheso (W/m2 K), l ke bolelele ba tšobotsi, λ ke mocheso oa mokelikeli (W/m K), le nomoro ea Prandtl (Pr) ke tekanyo ea karolelano ea coefficient ea phallo ea sekhahla ho phallo ea mocheso (kapa lebelo le botenya bo lekanang ba moeli oa mocheso), e hlalosoang e le 30:
moo k le cp li tsamaisang mocheso le mocheso o khethehileng oa mokelikeli, ka ho latellana.Ka kakaretso, moea le metsi ke tsona tse pholileng ka ho fetisisa bakeng sa lienjene tsa motlakase.Thepa ea mokelikeli ea moea le metsi mochesong oa tikoloho e bontšoa ho Lethathamo la 1.
Thermal modelling ea IM e itšetlehile ka maikutlo a latelang: boemo bo tsitsitseng ba 3D, ho phalla ha moferefere, moea ke khase e loketseng, mahlaseli a sa tsotelleng, mokelikeli oa Newtonian, mokelikeli o sa tsitsang, boemo bo sa thellang, le thepa e sa khaotseng.Ka hona, lipalo tse latelang li sebelisoa ho phethahatsa melao ea paballo ea boima, lebelo le matla sebakeng sa mokelikeli.
Ka kakaretso, palo ea paballo ea boima e lekana le phallo ea boima ba letlooa ka har'a seleng e nang le mokelikeli, ho khethoa ke foromo:
Ho ea ka molao oa bobeli oa Newton, sekhahla sa phetoho ea sekhahla sa mokelikeli se lekana le kakaretso ea matla a sebetsang ho eona, 'me kakaretso ea paballo ea lebelo e ka ngoloa ka mokhoa oa vector e le:
Mantsoe ∇p, ∇∙τij, le ρg ho equation e ka holimo a emela khatello, viscosity, le khoheli, ka ho latellana.Mecha ea ho pholisa (moea, metsi, oli, joalo-joalo) e sebelisoang joalo ka lipholisa mochining hangata e nkuoa e le Newtonian.Li-equations tse bontšitsoeng mona li kenyelletsa feela kamano e haufi pakeng tsa ho kuta le lebelo la lebelo (sekhahla sa khatello) ho ea ka lehlakoreng la ho kuta.Ha ho nahanoa ka viscosity e sa feleng le phallo e tsitsitseng, equation (12) e ka fetoloa ho 31:
Ho ea ka molao oa pele oa thermodynamics, sekhahla sa phetoho matla a phatsa ea metsi e lekana le kakaretso ea mocheso oa letlooa o hlahisoang ke karolo ea mokelikeli le matla a marang-rang a hlahisoang ke karolo ea mokelikeli.Bakeng sa phallo e hlakileng ea viscous ea Newtonian, equation ea paballo ea matla e ka hlalosoa e le31:
moo Cp e leng matla a mocheso ka khatello e sa khaotseng, 'me lentsoe ∇ ∙ (k∇T) le amana le conductivity ea mocheso ka har'a moeli oa sele ea metsi, moo k e bolelang conductivity ea mocheso.Phetoho ea matla a mochini hore e be mocheso e nkuoa ho latela \(\varnothing\) (ke hore, ts'ebetso ea ho qhala ha viscous) mme e hlalosoa e le:
Moo \(\ rho\) e leng bongata ba mokelikeli, \(\mu\) ke viscosity ea mokelikeli, u, v le w ke bokhoni ba tataiso ea x, y, z ea lebelo la mokelikeli, ka ho latellana.Lentsoe lena le hlalosa phetoho ea matla a mechine ho matla a mocheso 'me e ka hlokomolohuoa hobane e bohlokoa feela ha viscosity ea mokelikeli e phahame haholo' me lebelo la lebelo la mokelikeli le leholo haholo.Tabeng ea phallo e tsitsitseng, mocheso o sa khaotseng le conductivity ea mocheso, equation ea matla e fetoloa ka tsela e latelang:
Li-equations tsena tsa mantlha li rarolloa bakeng sa phallo ea laminar tsamaisong ea coordinate ea Cartesian.Leha ho le joalo, joalo ka mathata a mang a mangata a tekheniki, ts'ebetso ea mechini ea motlakase e amahanngoa haholo le phallo ea moferefere.Ka hona, lipalo tsena li fetotsoe ho theha mokhoa oa karolelano oa Reynolds Navier-Stokes (RANS) bakeng sa mohlala oa moferefere.
Mosebetsing ona, ho khethiloe lenaneo la ANSYS FLUENT 2021 bakeng sa mohlala oa CFD le maemo a moeli a lumellanang, joalo ka mohlala o nkiloeng: enjene ea asynchronous e nang le moea o pholileng o nang le matla a 100 kW, bophara ba rotor 80.80 mm, bophara ea stator 83,56 limilimithara (ka hare) le 190 limilimithara (ka ntle), lekhalo moea oa 1,38 limilimithara, bolelele ba kakaretso ea 234 limilimithara, palo , botenya ba likhopo 3 limilimithara..
Moetso oa enjene ea SolidWorks e pholileng moeeng ebe o romelloa ka har'a ANSYS Fluent le ho etsisoa.Ho phaella moo, liphetho tse fumanoeng li hlahlojoa ho netefatsa ho nepahala ha papiso e entsoeng.Ho phaella moo, IM e kopantsoeng ea moea le metsi e pholileng e ile ea etsoa ka mokhoa oa ho sebelisa software ea SolidWorks 2017 'me e etsisoa ho sebelisa software ea ANSYS Fluent 2021 (Setšoantšo sa 4).
Moqapi le litekanyo tsa mohlala ona li bululetsoe ke letoto la aluminium la Siemens 1LA9 'me li entsoe ka SolidWorks 2017. Mohlala o fetotsoe hanyenyane ho lumellana le litlhoko tsa software ea ho etsisa.Fetola mefuta ea CAD ka ho tlosa likarolo tse sa batleheng, ho tlosa li-fillets, li-chamfers le tse ling ha u etsa mohlala ka ANSYS Workbench 2021.
Tlhahiso ea moralo ke baki ea metsi, eo bolelele ba eona bo neng bo khethiloe ho tsoa ho liphetho tsa papiso ea mohlala oa pele.Liphetoho tse ling li entsoe ho ketsiso ea baki ea metsi ho fumana litholoana tse ntle ha u sebelisa letheka ho ANSYS.Likarolo tse fapaneng tsa IM li bonts'oa feiga.5a–f.
(A).Rotor core le IM shaft.(b) IM stator core.(c) Maqhubu a IM stator.(d) Foreimi ea kantle ea MI.(e) Baki ea metsi ea IM.f) motsoako oa li-IM tse pholileng tsa moea le metsi.
Fene e kentsoeng ka shaft e fana ka moea o sa khaotseng oa 10 m/s le mocheso oa 30 °C holim'a mapheoana.Boleng ba tekanyo bo khethoa ka mokhoa o sa reroang ho itšetlehile ka matla a khatello ea mali e hlahlojoang sehloohong sena, e leng se seholo ho feta se bontšitsoeng libukeng.Sebaka se chesang se kenyelletsa rotor, stator, stator windings le li-rotor cage bar.Lisebelisoa tsa stator le rotor ke tšepe, li-windings le lithupa tsa cage ke koporo, foreimi le likhopo ke aluminium.Mocheso o hlahisoang libakeng tsena o bakoa ke liketsahalo tsa motlakase, tse kang mocheso oa Joule ha motlakase o ka ntle o feta ka khoele ea koporo, hammoho le liphetoho tsa matla a khoheli.Litefiso tsa ho lokolloa ha mocheso oa likarolo tse fapaneng li nkuoe libukeng tse fapaneng tse fumanehang bakeng sa 100 kW IM.
Li-IM tse kopantsoeng tsa moea o pholileng le metsi, ho phaella ho maemo a ka holimo, li ne li boetse li kenyelletsa seaparo sa metsi, moo matla a ho fetisa mocheso le litlhoko tsa matla a pompo a neng a hlahlojoa bakeng sa litekanyetso tse fapaneng tsa phallo ea metsi (5 l / min, 10 l / min. le 15 l/min).Sephahla sena se khethiloe e le sekhahla se fokolang, kaha liphello ha lia ka tsa fetoha haholo bakeng sa phallo e ka tlaase ho 5 L / min.Ho phaella moo, tekanyo ea phallo ea 15 L / min e khethiloe e le boleng bo phahameng ka ho fetisisa, kaha matla a ho pompa a ile a eketseha haholo ho sa tsotellehe hore mocheso o ile oa tsoela pele ho oa.
Mefuta e fapaneng ea IM e ile ea kenngoa ho ANSYS Fluent mme ea hlophisoa le ho feta ho sebelisoa ANSYS Design Modeler.Ho feta moo, letlapa le nang le sebōpeho sa lebokose le nang le boholo ba 0.3 × 0.3 × 0.5 m le hahiloe ho pota AD ho hlahloba motsamao oa moea ho potoloha enjene le ho ithuta ho tlosoa ha mocheso sepakapakeng.Ho ile ha etsoa litlhahlobo tse tšoanang bakeng sa li-IM tse pholileng ka moea le metsi.
Moetso oa IM o entsoe ho sebelisoa mekhoa ea lipalo ea CFD le FEM.Meshes e hahiloe ka CFD ho arola domain name ka palo e itseng ea likarolo ho fumana tharollo.Li-meshes tsa Tetrahedral tse nang le boholo bo loketseng ba likarolo li sebelisoa bakeng sa geometry e rarahaneng ea likarolo tsa enjene.Likarolo tsohle li ne li tlatsitsoe ka likarolo tse 10 ho fumana liphetho tse nepahetseng tsa ho fetisa mocheso holim'a metsi.Geometry ea marang-rang ea mefuta e 'meli ea MI e bontšoa setšoantšong.6a,b.
Equation ea matla e u lumella ho ithuta phetisetso ea mocheso libakeng tse fapaneng tsa enjene.Mohlala oa moferefere oa K-epsilon o nang le mesebetsi e tloaelehileng ea marako o ile oa khethoa ho etsa mohlala oa moferefere ho potoloha bokantle bo ka ntle.Mohlala ona o nka matla a kinetic (Ek) le ho senyeha ha moferefere (epsilon).Koporo, aluminium, tšepe, moea le metsi li ile tsa khethoa bakeng sa thepa ea tsona e tloaelehileng bakeng sa ho sebelisoa lits'ebetsong tsa tsona tse fapaneng.Litefiso tsa ho felloa ke mocheso (sheba Lethathamo la 2) li fanoa e le lisebelisoa, 'me maemo a fapaneng a libaka tsa betri a behiloe ho 15, 17, 28, 32. Lebelo la moea holim'a mokotla oa motlakase le ne le behiloe ho 10 m / s bakeng sa mefuta e 'meli ea likoloi, le ho Ho phaella moo, litekanyetso tse tharo tse fapaneng tsa metsi li ile tsa nkoa ka lebaka la seaparo sa metsi (5 l / min, 10 l / min le 15 l / min).Bakeng sa ho nepahala ho hoholo, masala a li-equations tsohle a behiloe a lekana le 1 × 10–6.Khetha algorithm ea SIMPLE (Semi-Implicit Method for Pressure Equations) ho rarolla lipalo tsa Navier Prime (NS).Ka mor'a hore ho qalisoa ha lebasetere ho phethetsoe, seta se tla sebetsa ka makhetlo a 500, joalokaha ho bontšitsoe setšoantšong sa 7.
Nako ea poso: Jul-24-2023