Diesel Injeneri Yinjiza Amavuta 0445120061 Bosch kumuntu TGA TGS TGX 10.5L D2066

Dynamic cavitation imbere mumikorere ihanitse ya mazutu - ubushakashatsi nubushakashatsi bwa CFD（igice 2）

Mu kwigana CFD, gukemura ibyiciro binini byimivurungano ukoresheje Moderi nini ya Eddy Simulation (LES) yerekana inyungu yo kwerekana imiterere yigihe gito ugereranije na RANS [3] [4] [5].Ingaruka zikomeye za LES zishingiye kuri CFD mubidukikije ni inganda nini zo kubara zisabwa, zikurikirana amajana menshi yabigenewe.Hatariho ibikoresho nkibi, igihe cyo gukora urubanza rumwe gishobora gufata amezi, bigatuma iperereza rikomeye ridashoboka mugihe cyumvikana.

Iterambere ryibanze ryakozwe muburyo bwa CFD bugerageza guhuza inyungu zombi zerekana imidugararo ya LES na RANS [6].Izi moderi zikunze kwitwa Hybrid moderi kandi zitanga amahirwe menshi kugirango LES ikoreshwe mubidukikije.

Imvange ya LES-RANS CFD, ikoresheje uburyo buvanze uburyo bwinshi bwo kuvura cavitation bwakozwe kugirango bigereranye imikorere ya orifice.Kwerekana imidugararo ukoresheje uburyo bwa LES-RANS buvanze butuma habaho inyungu zingenzi zo kubara hejuru ya LES yuzuye, cyane cyane mumubare munini wa Reynolds (Re) urukuta ruzengurutse urukuta rwa geometrike muri injeneri ya mazutu.

2. Akazi k'ubushakashatsi

Icyitegererezo kiboneye cyakozwe mubice bigenzura hydraulic biva mumashanyarazi ya mazutu, harimo na orifice yo kugenzura umuvuduko mwinshi, hagati yinshinge hejuru na valve igenzura.Bitewe nubunini buke bwinshinge nyazo icyitegererezo cyakozwe inshuro 40 nubunini nyabwo, nkuko byagaragaye mubushakashatsi bwibanze ko imikorere ya orifice itagengwa nubunini [1].Iki gipimo cyiyongereye cyatumye byoroha cyane kubona amashusho ukoresheje kamera yihuta, Vision Research Phantom V1210.Kamera nkiyi ifite amatara akwiye ifata ibisobanuro birambuye byurugendo rutagaragara mumaso yumuntu, kandi bigatuma imyitwarire ya hydraulic ikurikiranwa hakoreshejwe inzira ya cavitation.