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Miedzo yakaitwa mugwara rectangular rakavharwa nemitsara yakachinjika yechina inclined cylindrical rods.Kudzvanya pamusoro pepakati tsvimbo yepamusoro uye kudonha kwekumanikidza kuyambuka gwara kwakayerwa nekusiyana kwerod's inclination angle.Masangano matatu edhayamita akasiyana-siyana akaedzwa.Migumisiro yekuyera inoongororwa uchishandisa musimboti weconservation of semits-empirimmommommommommommom uye semi-empirim parameter. s inogadzirwa inoenderana nedzvinyiriro panzvimbo dzakakomba dzegadziriro kune hunhu hwematanho etsvimbo.Kuzvimirira musimboti kunowanikwa kubata kwenhamba zhinji dzeEuler dzinoratidza kudzvanywa munzvimbo dzakasiyana, kureva kuti kana dzvinyiriro isina dimensionless uchishandisa fungidziro yeinopinza velocity yakajairwa kutsvimbo, seti yacho yakazvimirira pane dip angle.Iyo inokonzeresa semi-empirical correlation inogona kushandiswa Kugadzira yakafanana hydraulics.
Zvishandiso zvakawanda zvekupisa uye hukuru hwekufambisa zvinosanganisira seti yemamodules, machaneli kana masero ayo mvura inopfuura mune zvakanyanya kana zvishoma zvakaoma zvemukati zvimiro zvakaita setsvimbo, buffers, kuisa, etc. Munguva pfupi yapfuura, kwave kutsva kufarira kuwana kunzwisisa kuri nani kwemaitiro anobatanidza kumanikidzwa kwemukati kugovera uye masimba kune yakaoma internals kudonha kwese kudzvinyirira kwe module.Pakati pezvimwe zvinhu, izvi zvinokonzereswa nesainzi yekuwedzera zvinhu, kuwedzeredzwa kwesainzi kuwedzeredza kwave kuri kwekuwedzera kwesainzi. s, uye kuwedzera kweminiaturization yezvigadzirwa.Zvidzidzo zvemazuva ano zvekumanikidzira kuparadzirwa kwemukati uye kurasikirwa kunosanganisira migero yakaomeswa nembabvu dzakasiyana-siyana dzakaumbwa 1, electrochemical reactor cells 2, capillary constriction 3 uye lattice frame zvinhu 4.
Mamiriro emukati anonyanya kuzivikanwa ndeaya ane nharo cylindrical rods kuburikidza neunit modules, angave akasungwa kana kuti akaparadzaniswa.Muchitsinhanisi chekupisa, kugadzirisa uku kunowanzoitika kune shell side.Shell side pressure drop inobatana nekugadzirwa kwezvinopisa zvinopisa zvakadai semagetsi emagetsi, condensers uye evaporator.Muchidzidzo chechangobva kuitika, Wang et al.5 yakawana rettachment uye co-detachment flow states in a tandem configuration of rods.Liu et al.6 akayera kudonha kwekumanikidzwa mumatanho ane rectangular ane akavakirwa-mukati maviri U-yakaita chubhu mabundle ane akasiyana inclination angles uye calibrated nhamba yenhamba inofananidzira masumbu etsvimbo ane porous media.
Sezvinotarisirwa, kune huwandu hwekugadzirisa zvinhu zvinokanganisa hydraulic performance ye cylinder bank: rudzi rwekugadzirisa (eg, staggered kana in-line), zviyero zvine hukama (eg, pitch, dhayamita, kureba), uye inclination angle, pakati pevamwe. Vanyori vakawanda vakaisa pfungwa pakutsvaga maitiro asina dimensionless kuti atungamirire magadzirirwo ekutora maitiro akabatanidzwa ejometric parameter yekudzidza.7 yakaronga inobudirira porosity modhi uchishandisa kureba kweyuniti sero se control parameter, uchishandisa tandem uye akadzedzereka arrays uye Reynolds nhamba pakati 103 uye 104.Snarski8 akadzidza sei simba spectrum, kubva accelerometers uye hydrophone akasungirirwa humburumbira mumvura mugero, anosiyana nealt kuyerera.9 akadzidza rusvingo kumanikidzwa kuparadzirwa kumativi cylindrical tsvimbo mu yaw airflow.Mityakov et al.10 yakaronga nzvimbo yekumhanya mushure mehumburumbira yakakweshwa ichishandisa stereo PIV.Alam et al.11 yakaita chidzidzo chakakwana chetandem cylinders, ichitarisa pamusoro pemigumisiro yenhamba yeReynolds uye geometric ratio pane vortex shedding.Vakakwanisa kuziva nyika shanu, dzinoti kukiya, kuvharwa kwepakati, kusavhara, kuvharwa kwe subharmonic uye shear layer rettachment states.Zvidzidzo zvenguva pfupi yapfuura zvenhamba zvakaratidza kuumbwa kwevortexstricted maitiro.
Kazhinji, hydraulic performance ye unit cell inotarisirwa kuenderana nekugadzirisa uye geometry yechimiro chemukati, kazhinji inotaridzirwa neempirical correlations yezviyero zvekuongorora zvakananga.Mumichina yakawanda inoumbwa nezvikamu zve periodic, mafambiro ekuyerera anodzokororwa musero rimwe nerimwe, uye naizvozvo, ruzivo rune chokuita nemasero anomiririra anogona kushandiswa kuratidza iyo yose hydraulic maitiro echigadziro. yakashandiswa inogona kuderedzwa kazhinji.Muenzaniso wakajairika ndeyekuburitsa equation ye orifice plate 15.Munyaya yakakosha yematanda akakomberedzwa, angave akavharirwa kana kuvhurika kuyerera, chirevo chinonakidza chinowanzotaurwa mumabhuku uye chinoshandiswa nevagadziri ndiyo inotonga hydraulic magnitude (semuenzaniso, kudonhedza kudonhedza, kumanikidza, kuyerera kwevortex kuyerera kune frequency kune imwe conxint). inowanzonzi mutemo wekuzvimirira uye inotora kuti kuyerera kwemasimba kunotungamirirwa zvikuru nekupinda kwechikamu chemazuva ose uye kuti mugumisiro wechikamu cheaxial chinopindirana ne-cylinder axis hazvibvumirwi.Kunyange zvazvo pasina kubvumirana mumabhuku pamusoro pehutano hwehuwandu hwechirevo ichi, muzviitiko zvakawanda mukati mezviyero zvinopa maitiro anobatsira ezvidzidzo zvisingagoneki. ity yemusimboti yakazvimirira inosanganisira vortex-induced vibration16 uye single-phase uye maviri-chikamu avhareji yekudhonza417.
Mubasa remazuva ano, migumisiro yekudzidza kwekumanikidzwa kwemukati uye kudonha kwemhepo mumugero une mutsara wakachinjika wemakumbo mana akarerekera cylindrical rods anoratidzwa.Yera magungano matatu etsvimbo ane madhayamita akasiyana, kushandura angle yekurerekera.Chinangwa chikuru ndechekuongorora nzira iyo iyo kudzvanywa kupararira pamusoro petsvimbo kunoenderana neiyo yakazara kudzvinyirira kudonha muchiteshi. um kuongorora huchokwadi hwenheyo yekuzvimiririra.Pakupedzisira, dimensionless semi-empirical correlations inogadzirwa iyo inogona kushandiswa kugadzira zvakafanana hydraulic zvishandiso.
Chiyero chekuedza chaive nechikamu chekuongorora chekona chakagamuchira kuyerera kwemhepo kunopiwa neaxial fan.Chikamu chekuedza chine chikwata chinosanganisira matanda maviri akaenzana epakati uye maviri ehafu-tsvimbo akaiswa mumadziro emagetsi, sezvakaratidzwa mumufananidzo 1e, yose yakafanana dhayamita.Mifananidzo 1a-e inoratidza tsanangudzo yakazara yejometri uye zviyero zvekugadzirisa kwekugadzirisa kwechikamu chimwe nechimwe chekuedza.
a Inlet section (kureba mu mm).Gadzira b uchishandisa Openscad 2021.01, openscad.org.Main test section (kureba mu mm).Yakagadzirwa neOpenscad 2021.01, openscad.org c Cross-sectional maonero echikamu chikuru chekuedza (kureba mumm).Yakagadzirwa ichishandisa Openscad 2021.1 021.01, yakaputika maonero echikamu chebvunzo che openscad.org e.Created with Openscad 2021.01, openscad.org.
Matatu matatu ematanda emadhayamita akasiyana akaedzwa.Tafura 1 inoronga maitiro ejometri yenyaya imwe neimwe.Matanda akaiswa pane protractor kuitira kuti kona yavo inoenderana negwara rekuyerera inogona kusiyana pakati pe90 ° ne30 ° (Figure 1b uye 3) . Tsvimbo dzose dzakagadzirwa nesimbi isina tsvina uye dzakanangidzirwa kuti dzichengetedze mutsara wakafanana wechikamu chekuongorora.
Kuyerera kwemukati kwechikamu chekuedza kwakayerwa necalibrated venturi, sezvinoratidzwa muMufananidzo 2, uye yakatariswa uchishandisa DP Cell Honeywell SCX. Kupisa kwemvura pakubuda kwechikamu chekuongorora kwakayerwa nePT100 thermometer uye yakadzorwa pa 45 ± 1 ° C. Kuti ave nechokwadi chokuti planar velocity kugovera uye kuderedza chiyero chekupinda kwemvura ye turbutt inomanikidzirwa. kureba kweinenge 4 hydraulic diameters yakashandiswa pakati pekupedzisira chidzitiro uye tsvimbo, uye kureba kwekubuda kwaive 11 hydraulic diameters.
Schematic diagram yeVenturi chubhu inoshandiswa kuyera inlet flow velocity (kureba mumamilimita).Yakagadzirwa neOpenscad 2021.01, openscad.org.
Chengetedza kudzvanywa pane chimwe chezviso zvepakati tsvimbo uchishandisa 0.5 mm yekumanikidza tap iri pakati-ndege yechikamu chebvunzo. Iyo dhayamita yepombi inoenderana ne5 ° angular span;saka kururamisa kweangular inenge 2 °. Tsvimbo inotariswa inogona kutenderedzwa pamusoro peaxis yayo, sezvinoratidzwa mumufananidzo 3. Musiyano pakati petsvimbo pamusoro pekumanikidza uye kumanikidzika pamusuwo wechikamu chekuedza kunoyerwa nekusiyana kweDP Cell Honeywell SCX series.Iyi mutsauko wekumanikidzika unoyerwa kune imwe neimwe yebhari, yakasiyana-siyana yekuyerera \ \ velocity, inclination angle) (\ azimuta angle).
magadzirirwo ekuyerera.Madziro echannel anoratidzwa negrey.Kuyerera kunoyerera kubva kuruboshwe kuenda kurudyi uye kwakavharwa netsvimbo.Cherechedza kuti maonero "A" ari perpendicular kune rod axis.Matanda ekunze akaiswa semi-embedded mu lateral channel madziro.A protractor inoshandiswa kuyera angle ye inclination \(\ alpha \).Yakagadzirwa,0221.0
Chinangwa chekuedza ndechekuyera nekududzira kudonhedzwa kwekumanikidzwa pakati pechannel inlets uye kumanikidzwa kwepamusoro pepakati tsvimbo, \ (\ theta \) uye \ (\ alpha \) yeazimuth yakasiyana uye dips.Kupfupisa mhinduro, kudzvinyirirwa kwekusiyanisa kucharatidzwa nenzira isina dimensionless senhamba yaEuler:
apo \(\ rho \) iri uwandu hwemvura, \({u}_{i}\) ndiyo nhanho inopinza, \({p}_{i}\) ndiyo inlet pressure, uye \({p }_{ w}\) idzvinyiriro panzvimbo yakapiwa pamadziro etsvimbo. Velocity inopinza inogadziriswa mukati mezvikamu zvitatu zvakasiyana-siyana mumavheji / mitsara inofananidzwa ne1 mutsara we 1 m mutsara we 0 m. kunhamba Reynolds nhamba, \(Re\equiv {u}_{i}H/\nu \) (apo \(H\) kureba kwechiteshi, uye \(\nu \) ndiyo kinematic viscosity) pakati pe40,000 ne67,000. The rod Reynolds nhamba (\(Re\equiv \50d) kubva ku50 kusvika ku50/_nu. turbulence intensity inofungidzirwa nehukama chiyero kutsauka kwezviratidzo zvakanyorwa mu venturi ndeye 5% paavhareji.
Mufananidzo 4 unoratidza kuwirirana kwe \({Eu}_{w}\) neazimuth angle \(\theta \), parameterized by three dip angles, \(\ alpha \) = 30 °, 50 ° uye 70 ° .Zviyero zvinopatsanurwa mumagirafu matatu maererano nedhayamita yetsvimbo.Zvinogona kuonekwa kusava nechokwadi kwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hunoyerera mukati mechiyero chekuyerera . θ inotevera maitiro anowanzoitwa emadziro emadziro kumativi echipingamupinyi chedenderedzwa.Pakuyerera-kutarisana nemakona, kureva, θ kubva 0 kusvika 90 °, tsvimbo yemadziro emadziro inoderera, inosvika padiki pa 90 °, iyo inopindirana nepakati pakati pematanda apo velocity yakakura nekuda kwekuyerera kwenharaunda kusingakwanisi. yunifomu nekuda kwekuparadzaniswa kwemashure emuganhu wemadziro emadziro emudonzvo.Cherechedza kuti hapana shanduko mukona yekushongedzwa kwediki, iyo inoratidza kuti kuvhiringidzika kunobvira kubva pakatarisana neshear layers, senge Coanda mhedzisiro, ndeyechipiri.
Kusiyana kwenhamba yeEuler yemadziro akatenderedza tsvimbo yemakona akasiyana ekurerekera uye tsvimbo madhayamita.Yakagadzirwa neGnuplot 5.4, www.gnuplot.info.
Pane zvinotevera, tinoongorora zvabuda zvichibva pafungidziro yekuti nhamba dzeEuler dzinogona kuverengerwa chete nejometri parameters, kureva chimiro chehurefu hwereshiyo \(d/g\) uye \(d/H\) (apo \(H\) kureba kwechiteshi) uye kurerekera \(\ alpha \) rod axis, \({u}_{n}={u}_{i}\mathrm {sin} \alpha \) .Iyi dzimwe nguva inonzi musimboti wekuzvimirira.Chimwe chezvinangwa zvekuongorora kunotevera ndechekuongorora kana musimboti uyu unoshanda kunyaya yedu, uko kuyerera uye zvipingamupinyi zvakavharirwa mukati memigero yakavharwa.
Ngatitarisei dzvinyiriro yakayerwa pamberi penzvimbo yepakati yetsvimbo, kureva θ = 0. Maererano nekuenzanisa kwaBernoulli, dzvinyiriro panzvimbo iyi\({p}_{o}\) inogutsa:
apo \({u}_{o}\) irikumhanya kwemvura pedyo nemadziro etsvimbo pa θ = 0, uye tinofungidzira kurasikirwa kuduku kusingadzoreki.Cherechedza kuti dzvinyiriro ine simba inozvimiririra mune kinetic simba izwi.Kana \({u}_{o}\) isina chinhu (kureva mamiriro akamira), nhamba dzeEuler dzinofanira kubatanidzwa.Zvisinei mumufananidzo we4 ({\) inogona kucherechedzwa pa 4 ({\) Eu}_{w}\) iri pedyo asi haina kuenzana chaizvo neukoshi uhwu, kunyanya kumakona makuru ekunyudza.Izvi zvinoratidza kuti kukurumidza kuri pamusoro petsvimbo hakuperi pa \(\theta =0\), iyo inogona kudzvinyirirwa nekutsauka kwepamusoro kwemitsara yemazuva ano yakagadzirwa netsvimbo. kuzasi nekudzikisira sipidhi kumusoro.Tichifunga kuti ukuru hwekutsauka kuri pamusoro ndiko kuratidzwa kwevheji yekupinza pa shaft (kureva \({u}_{i}\mathrm{cos}\alpha \)), inofambirana nenhamba yeEuler inoti:
Mufananidzo 5 unoenzanisa maequation.(3) Inoratidza kubvumirana kwakanaka ne data yekuedza inoenderana.Kutsauswa kwepakati kwaiva 25%, uye chiyero chekuvimba chaiva 95%.Cherechedza kuti equation.(3) Maererano nemutemo wekuzvimirira.Saizvozvowo, Mufananidzo 6 unoratidza kuti nhamba yeEuler inoenderana nekumanikidzwa kwemashure,{1} uye 1 (0) muedzo wekare, {0} uye {0} muedzo wekare we {0} muyedzo wekare, {0}, uye {0} muedzo wekare gment, \({p}_{e}\), Inoteverawo muitiro wakaenzana ne \({\mathrm{sin}}}^{2}\alpha \) .Muzviitiko zvose izvi, zvisinei, coefficient inoenderana nedhayamita yetsvimbo, inonzwisisika sezvo iyo yekupedzisira inosarudza nzvimbo yakadziviswa.Ichi chimiro chakafanana nekudonha kwekumanikidzwa kweorifice plate, chikamu chechikamu chinoyerera che orifice plate, chikamu icho chikamu chechikamu chekuongorora chakaderedzwa. Muchiitiko ichi, dzvinyiriro inodonha zvakanyanya pakupuruzira uye zvishoma nezvishoma inopora sezvainokura ichidzokera kumashure. Tichifunga chirambidzo sechivharo chakatarisana neaxis yetsvimbo, kudonha kwesimba pakati pemberi nekumashure kwetsvimbo kunogona kunyorwa se18:
apo \({c}_{d}\) i drag coefficient inotsanangura chidimbu che pressure recovery pakati pe θ = 90° and θ = 180°, uye \({A}_{m}\) uye \({A}_{f}\) ndiyo diki diki yemahara yecross-section paurefu hwe unit perpendicular to rod axis,(A=m\} hukama ne{_} {m\} hukama \f_}{_} hukama \f_} Kuruboshwe (g+d\kurudyi)/g\).Nhamba dzeEuler dzinoenderana ndidzo:
Wall Euler nhamba pa \(\theta =0\) sebasa re dip.Iyi curve inoenderana ne equation.(3).Yakagadzirwa neGnuplot 5.4, www.gnuplot.info.
Wall Euler nhamba inochinja, mu \(\theta =18{0}^{o}\) (chikwangwani chizere) wobuda (chiratidzo chisina chinhu) chine dip.Macurves aya anoenderana nemusimboti wekuzvimirira, kureva \(Eu\propto {\mathrm{sin}}}^{2}\alpha \).Yakagadzirwa neGnuplot, www.info.gnu.5.
Mufananidzo 7 unoratidza kutsamira kwe \({Eu}_{0-180}/{\mathrm{sin}}}^{2}\alpha \) pa\(d/g\), ichiratidza kunyanyoenderana Kwakanaka.(5).Iyo yakawanikwa yekuzvuzvurudza coefficient iri \({c}_{d}=1.28\pm 0.02) kudonha kweiyo girafu kudonha kwe7% kudonha kweiyo graph zvakare). regedza uye kubuda kwechikamu chekuedza kunotevera maitiro akafanana, asi neakasiyana macoefficients anofunga nezve kudzoreredza kwekumanikidza munzvimbo yekumashure pakati pebhari uye yekubuda kwechaneru.Inoenderana inodhonza coefficient \({c}_{d}=1.00\pm 0.05\) ine chivimbo che 67%.
Kuzvuzvurudza kunoenderana ne\(d/g\) kudonhedza kumberi neshure kwetsvimbo\(\left({Eu}_{0-180}\kurudyi)\) uye kudonha kwesero pakati pechanopinza nekubuda nacho.Nzvimbo yegrey ndiyo 67% bhandi rekutenda rekubatana.Yakagadzirwa neGnuplot.
Iko kushoma kumanikidzwa \ ({p} _ {90}
Kudzvinyirirwa \ ({p}_{g}\) kunogona kuwirirana netsvimbo pamusoro pekumanikidza pa θ = 90 ° nekubatanidza kuparadzirwa kwekumanikidza pamusoro pegeji rinoparadzanisa tsvimbo yepakati pakati pepakati nemadziro (ona Mufananidzo 8).Chiyero chesimba chinopa 19:
apo \(y\) ndiyo inorongana yakajairika kutsvimbo kubva pakati pepakati pepakati pepakati, uye \(K\) ndiko kupeteka kwemutsara uripo pachinzvimbo \(y\) Pamadziro etsvimbo, kupeteka kunotariswa nechikamu che ellipse chetsvimbo pakona \(\ alpha \), kureva \(K\left(g/2\right)=\left(2/d\right){\ mathrm{sin} }^{2}\alpha \) (ona Mufananidzo 8) curvature pakurongeka kwepasirese \(y\) inopiwa ne:
Feature cross-sectional view, kumberi (kuruboshwe) uye pamusoro (pazasi). Yakagadzirwa neMicrosoft Word 2019,
Kune rimwe divi, nekuchengetedza misa, avhareji velocity mundege perpendicular kuyerera panzvimbo yekuyera \(\langle {u}_{g}\rangle \) ine hukama neinlet velocity:
apo \({A}_{i}\) inzvimbo inoyerera-inoyerera panzvimbo inopinza chiteshi uye \({A}_{g}\) inzvimbo inoyerera-inoyerera panzvimbo yekuyerwa (ona mufananidzo 8) zvichiteerana ne:
Ziva kuti \({u}_{g}\) haina kuenzana ne\(\langle {u}_{g}\rangle \) .Chaizvoizvo, Mufananidzo 9 unoratidza mwero wekumhanya \({u}_{g}/\langle {u}_{g}\rangle \), yakaverengerwa neequation.(10)–(14), yakarongwa zvinoenderana neimwe app/grete inotaridzwa yakabatanidzwa neyechipiri-order polynomial:
Reshiyo yehupamhi\({u}_{g}\) neavhareji\(\langle {u}_{g}\rangle \) mavelocities echannel center cross-section\(.\) The solid and dashed curves inoenderana ne equation.(5) uye kusiyanisa kwepakati pemakoefidhi anoenderana\(\pm 25\%\4.plot.plot.Cre.
Mufananidzo 10 unoenzanisa \({Eu}_{90}\) nemibairo yechiedzo yeequation.(16).Nzvimbo yepakati yakatsauka yaive 25%, uye chivimbo chaive 95%.
Nhamba yeWall Euler iri \(\theta ={90}^{o}\).Iyi curve inoenderana neequation.(16).Yakagadzirwa neGnuplot 5.4, www.gnuplot.info.
Simba remambure \({f}_{n}\) rinoshanda padanda repakati perpendicular kune axis yaro rinogona kuverengerwa nekubatanidza kudzvanywa pamusoro petsvimbo sezvinotevera:
uko yekutanga coefficient ndiyo kureba kwetsvimbo mukati mechiteshi, uye kubatanidzwa kunoitwa pakati pe0 ne2π.
Mucherechedzo we \({f}_{n}\) mugwara rekuyerera kwemvura kunofanirwa kuenderana nekumanikidza pakati pekupinda nekubuda kwechiteshi, kunze kwekunge friction yakaenzana netsvimbo uye diki nekuda kwekusakwana kwekuvandudzwa kwechikamu chekupedzisira Chiyero chekufamba hachina kuenzana.Naizvozvo,
Mufananidzo 11 unoratidza girafu ye equations.(20) yakaratidza kubvumirana kwakanaka kwemamiriro ose ekuedza.Zvisinei, pane zvishoma zvishoma 8% kutsauka kune kurudyi, iyo inogona kunzi uye inoshandiswa seyero yekusaenzana kwekukurumidza pakati pechiteshi chekupinza uye kubuda.
Chigero chemagetsi chiyero
Kusiyanisa kona yekurerekera kwetsvimbo, kudzvanywa pamadziro emudonzvo uye kudonha kwesimba mugero rine mitsara yakachinjika yechina inclined cylindrical rods yakayerwa.Matatu matatu akasiyana dhayamita tsvimbo maassemblies akaedzwa.Mukuedzwa kwenhamba yeReynolds nhamba, pakati pe2500 ne6500, iyo Euler rate. kumberi uye kushoma pane lateral gap pakati pematanda, kupora kuseri kwechikamu nekuda kwekuparadzaniswa kwemuganhu.
Data yekuedza inoongororwa pachishandiswa kukurumidza kuchengetedza kufunga uye semi-empirical ongororo kuti uwane invariant dimensionless nhamba dzinobatanidza nhamba dzeEuler kune hunhu huye hwemachaneli netsvimbo.Zvese geometrical maficha ekuvharira anomiririrwa zvizere nereshiyo pakati pedhayamita yetsvimbo uye mukaha pakati petsvimbo (laterally) uye urefu hwechiteshi (yakatwasuka).
Nheyo yekuzvimirira inowanikwa inobata nhamba zhinji dzeEuler dzinoratidza kudzvanywa munzvimbo dzakasiyana, kureva kuti kana dzvinyiriro isina dimensionless uchishandisa fungidziro yeinlet velocity yakajairwa kutsvimbo, iyo seti yakazvimirira pane dip angle.Mukuwedzera, chimiro chacho chine chokuita nehukuru uye kukurumidza kwekuyerera Kuenzanisa kwekuchengetedza kunopindirana uye kunotsigira iri pamusoro apa empirical musimboti.Iyo chete tsvimbo yepamusoro kumanikidzika pamukaha uri pakati pematanda inotsauka zvishoma kubva pamusimboti uyu.Dimensionless semi-empirical correlations inogadzirwa iyo inogona kushandiswa kugadzira yakafanana hydraulic devices.Iyi classical nzira yakashumwa ichangobva kutaurwa yeBernomoquous hydraulic app inopindirana neiyo inopindirana nehedhiyodhiyamu inopindirana neiyo ichangobva kutaurwa yeBernomoquation yehedhiyodhiyo s20,21,22,23,24.
Mhedzisiro inonyanya kunakidza inobva pakuongorora kudonha kwekumanikidza pakati pekupinza uye kubuda kwechikamu chekuedza. Mukati yekuedza kusaziva, mhedzisiro inodhonza coefficient yakaenzana nekubatana, iyo inoratidza kuvapo kwezvinotevera zvisingachinji paramita:
Ziva saizi \(\kuruboshwe(d/g+2\kurudyi)d/g\) muchidimbu cheequation.(23) ukuru huri muzvikomberedzo muequation.(4), zvikasadaro inogona kuverengerwa nechidimbu uye chemahara chepakati-chikamu perpendicular kutsvimbo, \({A}_{m}}}) inosara iri pakati pezviverengero zve{} A\) uye yn inoramba iri pakati pezviverengero \{} yechidzidzo chezvino (40,000-67,000 yezvigero uye 2500-6500 yetsvimbo) Zvakakosha kuziva kuti kana pane kusiyana kwekushisa mukati memugero, zvinogona kukanganisa huwandu hwemvura.
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