2488244 Injector Man Diesel don Injin Scania DC09/DC13/DC16

Dynamic cavitation a cikin babban aikin injector dizal - gwaji da bincike na CFD (Kashi na 4)

A taqaice: 

Hoto mai girma na cavitation a cikin wurin sarrafawa ya bayyana tasirin hydraulic da ba a gani a cikin binciken da ya gabata.An ƙirƙiri babban rami mara tushe tare da bangon bango kuma da zarar an kai ɓangaren juzu'i, cikawar ta faru a saman saman saman.Lokacin da koma baya ya isa ƙofar kofa, an sami sauye-sauyen tsarin gudana, an sake fasalin cavitation babba kuma ana maimaita tsarin.

Ƙwararren ƙira na hargitsi a cikin simintin CFD ya samar da sakamako waɗanda suka fi daidai da ƙima idan aka kwatanta da sakamakon gwaji.

CFD ya yi daidai da ɗimbin cavitation babba tare da bangon bango da taron cikon baya.

Yawan wannan hali akan sakamakon CFD shima ya yarda da na gwajin.

CFD ta bayyana cewa magudanar ruwa shima yana jan hankali, yana da alaƙa da halayen cavitation da aka kwatanta a sama.Gaskiyar cewa matsakaicin Cd a cikin CFD ya yarda da abin da aka auna a cikin gwajin ya ba da kwarin gwiwa cewa yawan bugun jini na CFD daidai ne.

Amfani da LSMs ya ba da damar haɓaka samfuran LES CFD a cikin tsarin lokaci mai iya sarrafawa.Wannan ya adana lokaci mai yawa don haɓaka samfura don abubuwan haɗin kai na gaske.

A cikin yanayin injector na gaske, yawancin cavitation na bugun jini ya yi yawa don yin tasiri ga aikin injin.Sanin al'amarin da aka bayar ta wannan aikin zai ba da damar kauce wa duk wani mummunan tasiri a cikin matakan ƙira na gaba.

Magana
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[2]C.Soteriou, M. Smith da R. Andrews, "Diesel allura - Laser haske takardar haske na ci gaban cavitation a orifices," a IMechE C529/018/98, 1998.
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[4] RE Bensow, "Simulation of the unste cavitation cavitation on Delft Twist11 foil ta amfani da RANS, DES da LES," a cikin Taro na Duniya na Biyu akan Marine Propulsors, Hamburg, Jamus, 2011.
[5]C.Egerer, S. Hickel, S. Schmidt da N. Adams, "Analysis of m cavitating kwarara a cikin wani micro tashar," a SHF taron a kan na'ura mai aiki da karfin ruwa Machines da Cavitation / Air a Water Pipes, Grenoble, Faransa, 2013.
[6]ML Shur, PR Spalart, MK Strelets da AK Travin, "Tsarin RANS-LES na matasan tare da jinkiri-DES da kayan aikin LES mai ƙirar bango," a cikin Jarida ta Duniya na Heat da Fluid Flow, 2008.
[7] C. Arcoumanis, JM Nouri da RJ Andrews, "Aikace-aikace na Refractive Index Matching zuwa Diesel Nozzle Internal Flow," a cikin 6th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 1992. [8] D. Bush, CCESoteriou , M. Winterbourn da C Daveau, "Bincike na'urorin sarrafawa na hydraulic a cikin injectors masu girma" a cikin Man Fetur don IC Engines, IMechE 2015.