2488244 Enjene ea Mafura a Dizeli bakeng sa Lienjineri tsa Scania DC09/DC13/DC16

Dynamic cavitation ka hare ho ente e phahameng ea diesel - tlhahlobo ea liteko le CFD (karolo ea 4)

Ka kakaretso: 

Ho nahana ka lebelo le phahameng la cavitation ka hare ho orifice ea taolo ho senotse phello ea hydraulic ea pulsing e sa bonoeng lithutong tse fetileng.Cavitation e kholo ea void e entsoe haufi le lerako la orifice mme hang ha karolo ea conical e fihlile, ho tlatsoa ka morao ho ile ha etsahala hodimo ho molapo o orifice.Ha backfilling e fihla monyako oa orifice, ho ne ho e-na le phetoho ea sebopeho sa phallo, cavitation e kholo ea void e fetotsoe mme ts'ebetso e phetoa.

Mokhoa o tsoetseng pele oa moferefere litšoantšong tsa CFD o hlahisitse liphetho tse nepahetseng haholo ho feta mefuta e tloaelehileng ha e bapisoa le liphetho tsa liteko.

CFD e tsamaellana le cavitation e kholo ea sekheo haufi le orifice le ketsahalo ea ho tlatsa ka morao.

Khafetsa ea boitšoaro bona liphethong tsa CFD le eona e lumellane le ea liteko.

CFD e senoletse hore sekhahla sa phallo se ne se boetse se phunya, se amahanngoa le boitšoaro ba cavitation bo hlalositsoeng ka holimo.Taba ea hore karolelano ea Cd ho CFD e lumellane le e lekantsoeng tekong e ile ea fana ka kholiseho ea hore sekhahla sa phallo ea CFD se nepahetse.

Ho sebelisa LSM ho nolofalelitse nts'etsopele ea mefuta ea LES CFD ka nako e laolehang.Sena se ile sa boloka nako e telele ha ho etsoa li-model tsa likarolo tsa boholo ba 'nete.

Tabeng ea ente ea 'nete, khafetsa ea pulsing cavitation e ne e phahame haholo ho susumetsa ts'ebetso ea enjene.Tlhokomeliso ea ts'ebetso e fanoeng ke mosebetsi ona e tla etsa hore ho qojoe liphello leha e le life tse ka 'nang tsa e-ba mpe nakong e tlang ea moralo.

Litšupiso
[1]C.Soteriou, M. Smith le R. Andrews, "Cavitation hydraulic flip and atomization in direct injection diesel sprays," ho IMechE C465/051/93, 1993.
[2]C.Soteriou, M. Smith le R. Andrews, "Diesel injection - laser light sheet illumination of the development of cavitation in orifices," ho IMechE C529/018/98, 1998.
[3]B.Befrui, P. Spiekermann, MA Shost le M.-C.Lai, "Lithuto tsa VoF-LES tsa GDi Multi-Hole Nozzle Plume Primary Karohano le Papiso le Boitsebiso ba Litšoantšo," Sebokeng sa ILASS Europe ka Liquid Atomization le Spray Systems, Chania, Greece, 2013.
[4]RE Bensow, "Simulation of the unsteady cavitation on the Delft Twist11 foil using Rans, DES le LES," ho Symposium ea Bobeli ea Machaba ea Marine Propulsors, Hamburg, Germany, 2011.
[5]C.Egerer, S. Hickel, S. Schmidt le N. Adams, "Analysis of turbulent cavitating flow in a micro channel," ho SHF Conference on Hydraulic Machines and Cavitation / Air in Water Pipes, Grenoble, France, 2013.
[6]ML Shur, PR Spalart, MK Strelets le AK Travin, "Mokhoa o nyalisitsoeng oa RNS-LES o nang le bokhoni ba LES bo liehang ho ba DES le lebota," ho International Journal of Heat and Fluid Flow, 2008.
[7] C. Arcoumanis, JM Nouri le RJ Andrews, "Kopo ea Refractive Index Matching to a Diesel Nozzle Internal Flow," ho 6th International Symposium ka Likopo tsa Mekhoa ea Laser ho Mechanics ea Mekelikeli, 1992. [8] D. Bush, CCESoteriou , M. Winterbourn le C Daveau, "Ho batlisisa likarolo tsa ho laola li-hydraulic ka li-injection tse phahameng" ho Fuel Systems bakeng sa IC Engines, IMechE 2015.