2488244 Dizilo Injector ya Mafuta a Scania DC09/DC13/DC16 Injini

Dynamic cavitation mkati mwa jekeseni wa dizilo wapamwamba kwambiri - kafukufuku woyesera ndi CFD (gawo 4)

Mwachidule: 

Kuyerekeza kothamanga kwambiri kwa cavitation mkati mwa orifice yowongolera kunawulula pulsing hydraulic effect yomwe sinawonekere m'maphunziro am'mbuyomu.Large void cavitation idapangidwa pakhoma la orifice ndipo pomwe gawo la conical lidafikira, kubweza kunachitika kumtunda kwa mtsinje.Kubwerera kumbuyo kukafika pakhomo la orifice, panali kusintha kwa kayendedwe ka kayendedwe kake, kusinthidwa kwakukulu kwa void cavitation ndipo ndondomekoyi inabwerezedwa.

Mawonekedwe apamwamba a chipwirikiti muzoyerekeza za CFD adatulutsa zolondola kwambiri kuposa zitsanzo wamba poyerekeza ndi zotsatira zoyeserera.

CFD inafanana ndi kugwedezeka kwakukulu kwa void cavitation pafupi ndi orifice ndi chochitika chodzaza kumbuyo.

Kuchuluka kwa khalidweli pa zotsatira za CFD kumagwirizananso ndi zomwe zayesera.

CFD idawulula kuti kuthamanga kwa magazi kunalinso kuthamanga, kulumikizidwa ndi khalidwe la cavitation lomwe tafotokozazi.Mfundo yakuti pafupifupi Cd mu CFD inagwirizana ndi zomwe zinayesedwa mu kuyesa zinapatsa chidaliro kuti CFD yothamanga mlingo wa pulsation inali yolondola.

Kugwiritsa ntchito ma LSM kunapangitsa kuti mitundu ya LES CFD ipangidwe munthawi yoyenera.Izi zinapulumutsa nthawi yochuluka popanga zitsanzo za zigawo zenizeni zenizeni.

Pankhani ya jekeseni weniweni, mafupipafupi a pulsing cavitation anali okwera kwambiri kuti asakhudze ntchito ya injini.Kudziwitsa za zochitika zomwe zaperekedwa ndi ntchitoyi zidzathandiza kuti zotsatira zomwe zingakhale zovuta zipewedwe m'mapangidwe amtsogolo.

Maumboni
[1]C.Soteriou, M. Smith ndi R. Andrews, "Cavitation hydraulic flip and atomization in direct injection diesel sprays," mu IMechE C465/051/93, 1993.
[2]C.Soteriou, M. Smith ndi R. Andrews, "Dizilo jakisoni - laser kuwala pepala chiwalitsiro cha chitukuko cha cavitation mu orifices," mu IMechE C529/018/98, 1998.
[3]B.Befrui, P. Spiekermann, MA Shost ndi M.-C.Lai, "VoF-LES Studies of GDi Multi-Hole Nozzle Plume Primary Breakup and Comparison with Imaging Data," mu ILASS Europe Conference on Liquid Atomization and Spray Systems, Chania, Greece, 2013.
[4]RE Bensow, "Simulation of the unsteady cavitation pa Delft Twist11 zojambulazo pogwiritsa ntchito RNS, DES ndi LES," mu Second International Symposium on Marine Propulsors, Hamburg, Germany, 2011.
[5]C.Egerer, S. Hickel, S. Schmidt ndi N. Adams, "Analysis of turbulent cavitating flow in a micro channel," mu SHF Conference on Hydraulic Machines and Cavitation / Air in Water Pipes, Grenoble, France, 2013.
[6] ML Shur, PR Spalart, MK Strelets ndi AK Travin, "Njira yosakanizidwa ya RNS-LES yokhala ndi kuchedwa kwa-DES komanso luso lopangidwa ndi khoma la LES," mu International Journal of Heat and Fluid Flow, 2008.
[7] C. Arcoumanis, JM Nouri ndi RJ Andrews, "Kugwiritsa Ntchito Refractive Index Matching to Diesel Nozzle Internal Flow," mu 6th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 1992. [8] D. Bush, CCESoteriou , M. Winterbourn ndi C Daveau, "Kufufuza zigawo za hydraulic control mu majekeseni apamwamba" mu Fuel Systems for IC Engines, IMechE 2015.