Tuydn tap Cdng trinh Hdi nghi Khoa hpc Cry hoc Thuy khi Todn quoc, Phan Thiet, 2008 101 Nghien ciru anh hu ong nhien lieu den cac thong so dac tru ng ciia tia phun trong buong chay dong co'''' Duong Viet[.]
Tuydn tap Cdng trinh Hdi nghi Khoa hpc Cry hoc Thuy Todn quoc, Phan Thiet, 2008 101 Nghien ciru anh hu-ong nhien lieu den cac thong so dac tru-ng ciia tia phun buong chay dong co' Duong Viet Dung, Huynh Ba Vang Truirng Dai Hoc Bdeh khoa - Dai hoc Dd Ndng Tom lilt: Qui luat bicn ddi tia phun nhien Ilea ddng co' dot chiu dnh hudng bdi nhieu yen td, trung tirnh chdt ciia nhidn lieu Id mot nhirng yea td quan Bdo cdo trinh hay md hinh ly thuyet vd mot sd ket qud nghien cuu thuc nghiem ve tia phun vdi nhien lieu LPG vd nhien lieu truven thdng Thirc nghiem duac tien hdnh doi vdi ddng ca Diesel phun gian tiep MAZDA IVL Igi phdng thi nghiem dgng co' trudng Dai hoc bdch khoa - Dgl hoc Dd Ndng vd dgng ca ddnh lira cuong birc Lambardini mot xi lanh phong thi nghicm mdv nhiet Dai hoc Lyon Ket qud cho thay md hinh ly thuyet khd phii hgp viri thuc nghiem Trong cimg mot dieu kien, nhien lieu cdng nang xuycn ihdu cua tia phun cdng Idn, gdc md tia phun thi ngugc lai Tdc hudng kinh, hudng true ciia cdc hat gidm ddi vdi nhien lieu nang ngugc Igi mat cdc hat tdng Investigation the influence of fuel properties on the spray characteristic in an engine combustion chamber Abstract: Fuel properties are the most important factors that affect the evolution of fuel sprav in engine combustion chamber This paper presents experimental and modeling investigation on LPG and conventional liquid fuel spray characteristics Experiment was conducted with a commercial compression ignition IDI engine MAZDA IVL at Danang University and single cylinder spark ignition engine Lambardini at Lvon Universltv Good agreement is achieved between modeling and experimental results At the same condition, as the fiiel density Increases the spray penetration and drop density Increase whereas the spray angle and the drops velocity decrease Co" SO ly t h u y e t Tinh ch^t cua tia phun nhien lieu dgng co ddt chiem vai trd quan trgng anh hudng den qui luat chay va muc phat thai d nhicm mdi trudng ddng co ddt dac biet la dgng co Diesel Bai bao trinh bay mot sd ket qua nghicn ciru thuc nghicm vc anh hudng tinh chat nhien lieu den dac trung hinh hoc cua tia phun Tinh chat cua tia phun trudng hgp xuycn than, gdc mo cung nhu phan bd cac hat tia phun md hinh linh loan dd xuycn thau, gdc md cua tia thco Lcfevre [1] : Gdc md tia phun : Pnl = uc„; Do xuyen thau : S = K| 0,5' 0,35 i^, -0,3 0,48 Vdi K,K| He sd phu Uuigc vao kcl ciiu voi phun [I],[2 Nghien ciru dnh huong nhien lieu den cdc thdng so ddc trims ciia tia phun Irons udns chdv ddng ca 102 APnf muc chcnh ap tai thdi didm phun giua ap suSt nhien lieu va ap suat buong chay ; p^, khdi lugng ncng cua nhien lieu ; p^,, V „i nhdt dgng luc va dgng luc hoc nhien iicu Md hinh xac dinh phan bo hat tia phun la md hinh Rosin Ramler md rdng [2]: - Q = exp V Ina J Trong dd: Q : phSn % \\\h tich cac hat cd dudng kinh nhd ban D chiem chd D Dudng kinh hat A : Dudng kinh Rosin ramler Q : Hang sd So dd tia phun dugc trinh bay nhu hinh 29 X, Hinh Sa dd tia phun X,, X2: chidu dai phan dii ; S : xuycn thau ; : gdc md tia phun Nhien lieu su dung thi nghicm la cac loai nhien lieu thudng dugc sir dung dgrig ca ddt trong, nhdt cua nhien lieu xac dinh a 35°C, khdi lugng rieng xac dinh dieu kien 15°C [3],[4],[5] tinh chat cua nhien lieu dugc md ta d bang Bdng Tinh chdt nhien lieu Nhien lieu Klidi lugng rieng (Kg/m') Nhiet hda hoi Do nhdt (nmr/s) (Kj/kg) Luc cang mat ngoai Nhiet soi (mN/m) K LPG(50/50) 554 411,5 0,2358 9,4 249 Xang 721 289,1 1,013 23,37 424 103 nifons Viet Dims Huynh Bd Vans Diesel 834,5 217,3 3,28 33,30 589 Diesel+10%E 826,8 235,4 2,85 29,57 557 Diesel+I5%E 824,7 242,7 2,75 29,30 549 Thuc n g h i e m So dd bd tri thuc nghicm trudng hgp tia phun nhien lieu LPG Idng va Xang dugc trinli bay nhu hinh Hop difeu khien Xang vdi phun I Bo khuech dai si-^A>l Hop didu khien' danh lira Accu thiiy luc Dong CO thi nghicm N, Dgng CO LPG dien L_ Hinh : Sa dd bd tri thi nghicm nhien lieu LPG long vd xdng Thi nghiem dugc lien hanh tai phdng thi nghiem may nhiet Dai hge Lyon Tia phun LPG, xang dugc ghi nhan nhd thi^t bj quay phim tdc cao FANTAX, phan bd hat va tdc cac hat tia phun dugc xac dinh nhd thiet bi laser Dantec 600 Cac thi nghiem dugc ti6n hanh ciing dicm kien: tdc cua ddng co lOOOv/ph; Lugng nhien lieu phun chu trinh la ling; gdc phun sdm la 75" tinh theo gdc quay cua true khuyu ap suat phun 40 bar 11^ lilOMg xuf ly luiiy tilth 11^ tllollg ^'isio.Scop* AVUIS FL.MA EMCON C'CD TH.MOO Uyiiamo thuy life APA 100 CllIIKTll S Khofp Mui Cam bieu ap 9uat buoiitf chiiy Mnii hinh Doii2 c