Buka isithombe esikhudlwana Engeza ukuze Uqhathanise Yabelana Ngezingxenye Zezimoto Umjovo Wamafutha Kadizili Umjovo Wephampu 0445110189 I-Auto Fuel Common Rail Injector

Abstract.

Inhlanganisela yokulingisa kanye namasu okuhlola akhethekile asetshenziselwe ukuphenya ukugeleza kwesikhashana kanye nezenzakalo ze-cavitation zedivayisi yokulawula ngaphakathi komjovo wedizili osebenza kakhulu. Ukuziphatha kwe-Dynamic cavitation kuthathwe ngemodeli enkulu ebonisa ngale, eyabe isisetshenziswa ukuthuthukisa nokuqinisekisa imodeli ye-CFD yesiphithiphithi esithuthukisiwe nge-Large Eddy Simulation. Lawa masu asetshenziswa ngaphakathi kwe-Delphi ukuze athole ukuqonda futhi athuthukise ukusebenza komjovo ngosayizi wangempela.

1 Isingeniso

Umjovo wedizili ngokungangabazeki uyinto ebaluleke kakhulu ekuzuzeni ukusebenza kwenjini yeprimiyamu ngokukhipha umoya ophansi. Ngakho-ke kulandela ukuthi ama-injection ezinjini ezisebenza kahle kufanele alawulwe ngokunemba. Ngenxa yalokhu, ama-valve okulawula amanzi angaphansi komhlaba kanye nezisekelo kufanele aklanywe futhi akhiqizwe ngokunemba okuphezulu, futhi ukuqonda ukuziphatha kwawo okuyisisekelo kuzonikeza umnikelo obalulekile enqubweni yokwenza kahle nokuhlela kahle. I-Delphi isebenzisa inhlanganisela yokulingisa kanye namasu okuhlola akhethekile ukuze iphenye izici zokugeleza zalezi zisetshenziswa.

Njengawo wonke ama-injection amasha, i-High Performance Diesel Injector ngaphansi kokuthuthukiswa e-Delphi ibe isihloko somsebenzi omningi wokulingisa. Okuthakazelisa kakhulu leli phepha, uphenyo lwe-CFD lwemisebenzi yokulawula amanzi angaphansi komhlaba.

I-Flow cavitation yisihloko esijwayelekile emishini yokujova udizili; isipiliyoni sokuhlola sangaphambilini sibonise ukuthi imodeli yemboni ye-Reynolds-Averaged Navier-Stokes (RANS) ayikwazanga ukunikeza imiphumela enembile yokuziphatha kwe-cavitation enamandla. Ngakho-ke ngaphezu komsebenzi we-CFD, amamodeli wezinga elikhulu (LSM) ezingxenyeni ezahlukene zemisebenzi yokulawula amanzi asetshenziswayo agunyazwa. Ukusetshenziswa kwamamodeli abonisa ngale wamavalvu okulawula kanye nezingosi ezikalini ezikhuphuke kakhulu kuvumela ukuqonda okuthuthukisiwe kokusebenza kwe-hydraulic [1] okungafinyeleleki kalula ngamanye amasu. Ukusebenza kwe-hydraulic kuzimele ngokwanele kuzo zonke izikali ukuze kube usizo njengethuluzi lokuthuthukisa.