Experimental characterization of high pressure gasoline direct injection sprays
- 120 Downloads
An experimental investigation of multihole gasoline direct injection sprays at high injection pressures in a quiescent test chamber is carried out. A multihole injector with six injection holes and 60° spray cone angle is used for this purpose. High-speed Mie-scattering and high-speed Schlieren visualisations are used to characterise vapour penetration, liquid penetration, spray angle and velocity under typical engine high load and low load conditions. Variations of chamber conditions are also investigated in order to assess the effects of chamber temperature, density and pressure on the spray characteristics. The important chamber parameters are identified which affect the performance of multihole injectors in spark ignition engines.
KeywordsFlash boiling Multi-hole injector Air entrainment Spray collapse Jet interactions
Unable to display preview. Download preview PDF.
- W. F. Piock, B. Befrui, A. Berndorfer and G. Hoffmann, Fuel pressure and charge motion effects on GDi engine particulate emissions, SAE International Journal of Engines (2015) 464–473.Google Scholar
- S. Lee and S. Park, Spray atomization characteristics of a GDI injector equipped with a group-hole nozzle, Fuel (2014) 50–59.Google Scholar
- G. Wigley, M. Goodwin, G. Pitcher and D. Blondel, Imaging and PDA analysis of a GDI spray in the near-nozzle region, Experiments in Fluids (2004) 565–574.Google Scholar
- D. S. Choi, G. M. Choi and D. J. Kim, Spray structures and vaporizing characteristics of a GDI fuel spray, KSME International Journal (2002) 999–1008.Google Scholar
- M. M. Khan, RANS and LES of multi-hole sprays for the mixture formation in piston engines, Diss. Ecole Centrale de Lyon (2014).Google Scholar
- A. Montanaro and L. Allocca, Flash boiling evidences of a multi-hole GDI spray under engine conditions by miescattering measurements, SAE Technical Paper (2015).Google Scholar
- S. Bruyère-Bergeron and P. Seers, Relative importance of fuel properties on gdi fuel spray tip penetration, Transactions of the Canadian Society for Mechanical Engineering, 38 (3) (2014) 347–358.Google Scholar
- B. Zuo, A. Gomes and C. J. Rutland, Studies of superheated fuel spray structures and vaporization in GDI engines, 11th International Multidimensional Engine Modeling User’s Group Meeting, Detroit (2001).Google Scholar
- I. Schmitz, I. Wolfgang and A. Leipertz, Flash boiling effects on the development of gasoline direct-injection engine sprays, Journal of Fuels and Lubricants: SAE-Transactions, 111 (2002).Google Scholar