Umjovo ka-Diesel Fuel Injector 0445120061 Bosch for Man TGA TGS TGX 10.5L D2066

I-Dynamic cavitation ngaphakathi komjovo wedizili osebenza kakhulu - uphenyo lokuhlola kanye ne-CFD(ingxenye 2)

Ekulingiseni kwe-CFD, ukuxazulula izakhiwo ezinkulu ezinesiyaluyalu kusetshenziswa amamodeli asuselwa ku-Large Eddy Simulation (LES) kukhombisa inzuzo yesikhashana yokumodela ngaphezu kokulingiswa kwe-RANS [3] [4] [5]. Ububi obungathi sína be-LES based CFD endaweni yezimboni ingumthombo omkhulu wekhompiyutha odingekayo, wokuhleleka kwama-cores angamakhulu amaningana azinikele. Ngaphandle kwensiza enjalo, isikhathi sokusebenza kwecala elilodwa singathatha izinyanga, okwenza uphenyo olunzulu lungenzeki ngesikhathi esinqunyiwe.

Intuthuko enkulu yenziwe ngaphakathi kokumodela kwe-CFD okuzama ukuhlanganisa izinzuzo zakho kokubili imodeli ye-turbulence ye-LES kanye ne-RANS [6]. Lawa mamodeli avame ukubizwa ngamamodeli ayingxube futhi anikeze amandla amakhulu okuthi i-LES isetshenziswe endaweni yezimboni.

Imodeli eyingxube ye-LES-RANS CFD, kusetshenziswa indlela ye-multi-phase ye-cavitation yadalwa ukuze ilingise ukusebenza kwe-orifice yokulawula. Ukumodela kwesiphithiphithi kusetshenziswa indlela exubile ye-LES-RANS kuvumela ukuzuza okuphawulekayo okubalwe phezu kwe-LES egcwele, ikakhulukazi kunombolo ephezulu ye-Reynolds (Re) yamajometri ageleza ahlanganiswe odongeni ngaphakathi komjovo wedizili.

2. Umsebenzi Wokulinga

Kudalwe amamodeli abonisa ngale ezingxenyeni zokulawula ama-hydraulic kusuka ngaphakathi komjovo wedizili, okuhlanganisa i-orifice yokulawula ukucindezela okuphezulu, phakathi kwephezulu yenaliti kanye ne-valve yokulawula. Ngenxa yesilinganiso esincane sama-injection wangempela imodeli yadalwa ngezikhathi ezingu-40 zobukhulu bangempela, njengoba kuboniswe ezifundweni zangaphambilini ukuthi ukusebenza kwe-orifice flow kuzimele ngokunengqondo esikalini [1]. Lesi sikali esikhulisiwe sivumele ukubonwa kalula okukhulu kusetshenziswa ikhamera enesivinini esikhulu, i-Vision Research Phantom V1210. Ikhamera enjalo enokukhanya okufanele ithwebula imininingwane yokugeleza okungabonakali ngeso lomuntu, futhi ivumela ukuziphatha kwe-hydraulic ukuthi kulandelelwe ngenqubo ye-cavitation.