Diesel Fuel Injector 456-3493 for Caterpillar C9.3 CAT Truck Engine Spare Parts

Dynamic cavitation ka hare ho ente e phahameng ea diesel - tlhahlobo ea liteko le CFD (karolo ea 1)

Kakaretso.

Motsoako oa ho etsisa le mekhoa e khethehileng ea liteko e 'nile ea sebelisoa ho batlisisa phallo ea nakoana le cavitation phenomena ea sesebelisoa sa ho laola ka har'a mochine o phahameng oa ts'ebetso ea diesel. Boits'oaro bo matla ba cavitation bo hapiloe ka mokhoa o moholo o pepeneneng, o ileng oa sebelisoa ho nts'etsapele le ho netefatsa mohlala o tsoetseng pele oa moferefere oa CFD ka Large Eddy Simulation. Mekhoa ena e sebelisoa ka hare ho Delphi ho fumana temohisiso le ho ntlafatsa ts'ebetso ea ente ka boholo ba 'nete.

1 Selelekela

Ente ea diesel ke eona ntho ea bohlokoa ka ho fetesisa ho fihlela ts'ebetso ea enjene ea premium e nang le mesi e tlase. Ka hona ho latela hore li-injection tsa lienjineri tse sebetsang hantle li tlameha ho laoloa ka nepo. Ka lebaka leo, li-valve tsa hydraulic control valves le orifices li tlameha ho raloa le ho etsoa ka ho nepahala ho phahameng, 'me ho utloisisa boitšoaro ba bona ba mantlha ho tla fana ka tlatsetso ea bohlokoa ts'ebetsong ea ho ntlafatsa le ho lokisa hantle. Delphi e sebelisa motsoako oa papiso le mekhoa e khethehileng ea liteko ho batlisisa litšobotsi tsa phallo ea lisebelisoa tsena.

Joalo ka li-injection tsohle tse ncha, Injector e Phahameng ea Diesel e ntseng e ntlafatsoa Delphi e bile taba ea tšebetso e ngata ea papiso. Se khahlang haholo pampiring ena, ke lipatlisiso tsa CFD tsa mesebetsi ea taolo ea haeteroliki.

Flow cavitation ke sehlooho se tloaelehileng ka thepa ea ente ea diesel; phihlelo e fetileng ea liteko e bontšitse hore mokhoa oa indasteri oa Reynolds-Averaged Navier-Stokes (RANS) o ne o sitoa ho fana ka liphello tse nepahetseng bakeng sa boitšoaro bo matla ba cavitation. Kahoo, ntle le mosebetsi oa CFD, mefuta e meholo (LSM) ea likarolo tse fapaneng tsa mesebetsi ea taolo ea haeteroliki e ile ea laeloa. Tšebeliso ea mekhoa e hlakileng ea li-valve tsa taolo le li-orifices ka likala tse ntseng li eketseha haholo li nolofalletsa kutloisiso e tsoetseng pele ea ts'ebetso ea hydraulic [1] e ke keng ea finyelloa habonolo ka mekhoa e meng. Ts'ebetso ea hydraulic e ikemetse ka ho lekaneng ho likala tsohle hore e ka ba molemo joalo ka sesebelisoa sa nts'etsopele [2].