Abstract
Research and/or Engineering Questions/Objective The performance of injector is very important to gasoline direct injection (GDI) engine control. The influence factors of internal flow characteristics for injector were researched. Methodology The Euler multi-fluid model was built and used to analysis. Based on analysis of the internal flow with different mediums and different pressure difference, the flow characteristics of nozzle outlet orifice section were studied. Results The discharge coefficient of nozzle was mainly influenced by the degree of cavitation. With the increase of cavitation level, the average velocity added and turbulence energy decreased on nozzle outlet orifice section. The cavitation level was depended on the bubble number density and pressure difference of inlet and outlet of injector. Limitations of this study Spray characteristics of GDI injector should be investigated based on the results of this paper. What does the paper offer that is new in the field in comparison to other works of the author Most previous analysis of occurrence position for cavitation phenomenon and influence parameters are from macroscopic perspective. This paper mainly analyzes microcosmic influence factors of the cavitation phenomenon within a GDI injector, and then the flow characteristics on orifices export section, which could provide experiential data for later spray simulation, and meanwhile important basis for simulation of the internal flow process. Conclusion The cavitation level was mainly influenced by initial value of bubble number density, and increased with it added. Under the same condition, saturated vapour pressure of medium was higher, the influence of bubble number density was much greater. After the bubble number density was greater than 1e + 12, the cavitation flow inside the injector tends to be stable. When pressure difference of inlet and outlet of injector was increased, cavitation intensified.
F2012-A02-018
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References
Nouri JM, Hamid MA, Yan Y et al (2007) Spray characterization of a piezo pintle-type for gasoline direct injection engines. J Phys: Conf Ser 85:1–12
Wang X, Gao J, Jiang D et al (2005) Spray characteristics of high-prssure swirl injector fueled with methanol and ethanol. Energy Fuels 19:2394–2401
Li GW, Li F, Reitz RD (1999) Modeling fuel preparation and stratified combustion in a gasoline direct injection engine. SAE paper 1999-01-0175
Sandquist H, Lindgren R, Denbratt I (2000) Sources of hydrocarbon emissions from a direct injection stratified charge spark ignition engine. SAE Paper 2000-01-1906
Tomoda T, Sasakl S, Sawada D et al (1997) Development of direct injection gasoline engine-study of stratified mixture formation. SAE Paper 970539
Gilles-Birth I, Bernhardt S, Spicher U et al (2005) A study of the in-nozzle flow characteristics of valve-covered orifice nozzles for gasoline direct injection. SAE Paper 2005-01-3684
Gilles-Birth I, Rechs M, Spicher U, Bernhardt S (2006) Experimental investigation of the in-nozzle flow of valve covered orifice nozzles for gasoline direct injection. In: Proceedings of the seventh international symposium on internal combustion diagnostics, Baden–Baden, Germany, pp 59–78
Nouri JM, Mitroglou N, Yan Y et al (2007) Internal flow and cavitation in a multi-hole injector for gasoline direct-injection engines. SAE Technical Paper Series, 2007-01-1405
Serras-Pereira J, van Romunde Z, Aleiferis PG et al (2010) Cavitation, primary break-up and flash boiling of gasoline, iso-octane and n-pentane with a real-size optical direct-injection nozzle. Fuel 89:2592–2607
Aleiferis PG, Serras-Pereira J, Augoye A et al (2010) Effect of fuel temperature on in-nozzle cavitation and spray formation of liquid hydrocarbons and alcohols from a real-size optical injector for direct-injection spark-ignition engines. Int J Heat Mass Transfer 53:4588–4606
Wang X, Su W (2009) A numerical study of cavitating flows in high-pressure diesel injection nozzle holes using a two-fluid model. Chin Sci Bull 54(10):1655–1662
He Zhixia, Yuan Jianping, Li Detao et al (2005) Three dimensional numerical simulation of two phase turbulent flow in nozzle of diesel engines. Chin Intern Combust Engine Eng 26(6):18–21
Salvador FJ, Hoyas S, Novella R et al (2010) Numerical simulation and extended validation of two-phase compressible flow in diesel injector nozzles. Proc IMechE 225:545–563
Bergwerk W (1959) Flow pattern in diesel nozzle spray holes. Proc Inst Mech Eng 173(25):655–660
Isabell GB, Sören B, Ulrich S et al (2005) A study of the in-nozzle flow characteristic of valve covered orifice nozzles for gasoline direct injection. SAE Paper 2005-01-3684
Lopez de Bertodano M, Lahey RT Jr, Jones OC (1994) Turbulent bubbly two-phase flows in a triangular. Nucl Eng Des 146:43–52
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Zou, B., Yang, S., Li, K., Li, J., Liu, J. (2013). Analysis of Internal Flow Characteristics for GDI Injector. In: Proceedings of the FISITA 2012 World Automotive Congress. Lecture Notes in Electrical Engineering, vol 189. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33841-0_32
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DOI: https://doi.org/10.1007/978-3-642-33841-0_32
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