Sizifundo zivuliweTezemidlaloPizindlu zePodaEjector esekelweDubleVenturiEumphumela

I-venturi ejector ingenza izinkambu ze-vacuum ukuthutha izinhlayiya ngenxa yomphumela we-venturi. Ukusebenza kokuthutha kwempushana ekhishwayo ngokususelwe kumphumela owodwa kanye nekabili-venturi kanye nomthelela wesimo se-nozzle ekusebenzeni kokuthutha kwaphenywa ngokulandelana ngendlela yokuhlola kanye nokulingisa kwezinombolo okusekelwe endleleni yokuhlanganisa ye-CFD-DEM. Imiphumela yamanje ibonisaisivinini somoyaye-particle inlet iyanda ngenxa yomphumela we-double-venturi, ozuzisa izinhlayiya ku-umjovo; amandla okushayela asebenzisa izinhlayiya ngokwanda koketshezi, okusho ukuthi izinhlayiya zingathuthwa ziyiswe kude; uma i-nozzle isondela ekuthumeleni, i-isivinini somoyaof the particle inlet kuyinto futhi mkhulu amandla ukuncela asebenza izinhlayiya kuba; lapho umlomo wombhobho usondela ekuthekeliseni, liyancipha inani lezinhlayiya zediphozithiumjovongu; noma kunjalo, izinhlayiya zingavinjelwa ku-venturi tube uma umlomo wombhobho useduze kakhulu nokuthunyelwa kwamanye amazwe. Ukwengeza, ukuze kuncishiswe ukubekwa kwezinhlayiyana, isisombululo esifanele sivezwa lapha, okungukuthi, indawo ye-nozzle kude nokuthunyelwa ngaphandle,y∗ = 30 mm.

Isingeniso

Ubuchwepheshe bokudlulisa umoya womoya bunokufaneleka okuningi, njengokuhlela okuvumelana nezimo, akukho ukungcoliswa kothuli, izindleko eziphansi zokusebenza kanye nokugcinwa okulula. Ngakho-ke, ubuchwepheshe bokudlulisa umoya we-pneumatic busetshenziselwa kakhulu izimboni ze-petroleum, amakhemikhali, i-metallurgical, imithi, ukudla kanye nezimbiwa. I-Venturi powder ejector iyona eqinile ngegesi esekelwe kumphumela we-venturi. Ezinye izifundo zokuhlola nezinombolo kumjovo we-venturi zenziwa eminyakeni eyishumi edlule ukuze kuqondwe izakhiwo zawo zokuthutha.

Umcwaningiyenza izifundo zokuhlola nezinombolo ze-jet tube esekelwe ku-venturi futhi yahlaziya ubudlelwano phakathi kwamapharamitha ahlukene ngezindlela zokuhlola nezinombolo.Umcwaningi yenze uchungechunge lophenyo lokuhlola kokubili kwesigaba esisodwa segesi kanye nengxube yamalahle egeleza ku-venturi, futhi yabonisa ukuthi ukwehla okubukhali kwengcindezi emile kanye nesilinganiso sokulayisha ivolumu kubonwe ngaphakathi kwe-venturi.Umcwaningiyenze ucwaningo lokubala mayelana nokuziphatha kokugeleza komjovo oqinile wegesi ngendlela ye-Eulerian, okubonisa ukuthi isivinini se-axial particle velocity siyakhuphuka kuqala bese siyehla.Umcwaningikuphenywe ngokuziphatha kwe-venturi eqinile yezigaba ezimbili esebenzisa izindlela zokuhlola nezinombolo.Umcwaningibasebenzise indlela ye-elementi ehlukene (DEM) ukuze batadishe umjovo oqinile wegesi, futhi bathola ukuthi izinhlayiya eziqinile zinqwabelana ngokusobala eduze naphansi kwendawo engakwesokunxele yomjovo ngenxa yezinhlayiya eziqinile namandla adonsela phansi kanye nokuzungeza kwegesi.

Izifundo ezingenhla zigxile kuphela ku-ejector ngesakhiwo esisodwa se-venturi, okungukuthi, umphumela owodwa we-venturi ushiwo ku-ejector. Emkhakheni wokulinganisa ukugeleza kwegesi, idivayisi esekelwe kumphumela ophindwe kabili isetshenziswa kabanzi ukwandisa umehluko wengcindezi nokuthuthukisa ukunemba kokulinganisa. Kodwa-ke, i-ejector ene-double-venturi effect ayivami ukusetshenziswa ezinhlayiyeni zokuthutha. Into yocwaningo lapha i-venturi powder ejector esekelwe kumphumela we-double-venturi. I-ejector iqukethe i-nozzle kanye ne-venturi tube yonke. Kokubili i-nozzle neshubhu ye-venturi kungakha umphumela we-venturi, futhi kusho ukuthi umphumela we-double-venturi ukhona ku-ejector. Ukugeleza komoya okunesivinini esikhulu sejethi esivela kubhobho ye-venturi ejector, eyenza inkambu ye-vacuum ngenxa yomphumela we-venturi kanye nezinhlayiya eziphoqelela zingena ekamelweni lokudonsa ngaphansi kwethonya lamandla adonsela phansi kanye nokungena. Khona-ke, izinhlayiya zihamba nokugeleza komoya.

Indlela yokuhlanganisa ye-Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) isetshenziswe ngempumelelo ezinhlelweni eziyinkimbinkimbi zokugeleza okuqinile kwegesi.Umcwaningiyamukela indlela ye-CFD-DEM yokumodela ukugeleza kwesigaba segesi sezinhlayiyana ezimbili, isigaba segesi saphathwa njengokuqhubekayo futhi samodelwa nge-computational fluid dynamics (CFD), ukunyakaza kwezinhlayiyana nokushayisana kwalingiswa ngekhodi ye-DEM.Umcwaningiyamukele indlela ye-CFD-DEM yokulingisa ukugeleza okuqinile kwegesi, i-DEM yaqashwa ukuze imodeli yesigaba sezinhlayiyana eziyimbudumbudu futhi i-CFD yakudala isetshenziselwa ukulingisa ukugeleza koketshezi.Umcwaningiyethule ukulingisa kwe-CFD-DEM kombhede omanzi oqinile oqinile futhi yahlongoza imodeli entsha yokudonsa.Umcwaningiithuthukise indlela entsha yokuqinisekisa ukulingiswa kombhede oxutshwe negesi oqinile nge-CFD-DEM.Umcwaningisisebenzise indlela ehlanganisiwe ye-CFD-DEM ukulingisa isici sokugeleza okuqinile kwegesi ngaphakathi kwemithombo ye-fibrous ukutadisha ithonya lesakhiwo se-fiber kanye nezakhiwo zezinhlayiyana ekubekweni kwezinhlayiyana kanye nokuhlanganisa kwinqubo yokuhlunga.

Kuleli phepha, izakhiwo zokuthutha ze-powder ejectors ngokusekelwe kumphumela owodwa kanye ne-double-venturi kanye nomthelela wesimo se-nozzle ekusebenzeni kokuthutha zaphenywa ngokulandelana ngendlela yokuhlola kanye nokulingisa kwezinombolo okusekelwe endleleni yokuhlanganisa ye-CFD-DEM.

Iziphetho

Ukusebenza kwezokuthutha kwama-ejector asekelwe kumphumela owodwa kanye ne-double-venturi kwaphenywa ngokulandelana ngendlela yokuhlola kanye nokulingisa kwezinombolo okusekelwe endleleni yokuhlanganisa ye-CFD-DEM. Imiphumela yamanje ibonisa isivinini somoya sokukhuphuka kwezinhlayiyana zokungena ngenxa yomphumela we-double-venturi, ozuzisa izinhlayiya kumjovo. Amandla okushayela izinhlayiya ngoketshezi anda, okuzuzisa ukuthi izinhlayiya zidluliselwe kude.