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Effect of Fuel Injector Location and Nozzle-Hole Orientation on Mixture Formation in a GDI Engine: A CFD Analysis
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Gasoline direct injection (GDI) engines have gained popularity in the recent times because of lower fuel consumption and exhaust emissions compared to that of the conventional port fuel injection (PFI) engine. But, in these engines, the mixture formation plays an important role which affects combustion, performance and emission characteristics of the engine. The mixture formation, in turn, depends on many factors of which fuel injector location and orientation are most important parameters. Therefore, in this study, an attempt has been made to understand the effect of fuel injector location and nozzle-hole orientation on the mixture formation, performance and emission characteristics of a GDI engine. The mixture stratification inside the combustion chamber is characterized by a parameter called “stratification index” which is based on average equivalence ratio at different zones in the combustion chamber. The analysis is carried out on a four-stroke wall-guided GDI engine by computational fluid dynamics (CFD) analysis using CONVERGE software. The spray breakup model used, in this study, is validated with the available experimental results from the literature to the extent possible. The analysis is carried out for four nozzle-hole orientations at two different fuel injector locations. All the CFD simulations are carried out at an engine speed of 2000 rpm, with an overall equivalence ratio of about 0.65±0.05. The results show that at the original injector location, with smaller nozzle-hole diameter, for all the nozzle-hole orientations better mixture formation, higher Indicated mean effective pressure (IMEP) and lower HC emissions are obtained. But, at the new fuel injector location, better mixture formation, higher IMEP, and lower HC emissions are obtained with the larger nozzle-hole diameter with the which is also indicated by stratification index closer to 1.
CitationKaraya, Y., Addepalli, S., and Mallikarjuna, J., "Effect of Fuel Injector Location and Nozzle-Hole Orientation on Mixture Formation in a GDI Engine: A CFD Analysis," SAE Technical Paper 2018-01-0201, 2018, https://doi.org/10.4271/2018-01-0201.
Data Sets - Support Documents
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- Iwamoto, Y., Noma, K., Nakayama, O., Yamauchi, T. et al., “Development of Gasoline Direct Injection Engine,” “SAE Technical Paper 970541,” 1997, doi:10.4271/970541.
- Zhao, F., Lai, M.-C., and Harrington, D.L., “Automotive Spark-Ignited Direct-Injection Gasoline Engines,” Progress in Energy and Combustion Science 25(5):437-562, 1999, doi:10.1016/S0360-1285(99)00004-0.
- Krishna, A.S., Mallikarjuna, J.M., and Kumar, D., “Effect of Engine Parameters on In-Cylinder Flows in a Two-Stroke Gasoline Direct Injection Engine,” Applied Energy 176(Supplement C):282-294, 2016, doi:10.1016/j.apenergy.2016.05.067.
- Harshavardhan, B. and Mallikarjuna, J.M., “Effect of Piston Shape on In-Cylinder Flows and Air-Fuel Interaction in a Direct Injection Spark Ignition Engine - A CFD Analysis,” Energy 81(Supplement C):361-372, 2015, doi:10.1016/j.energy.2014.12.049.
- Zheng, Z., Tian, X., and Zhang, X., “Effects of Split Injection Proportion and the Second Injection Time on the Mixture Formation in a GDI Engine under Catalyst Heating Mode using Stratified Charge Strategy,” Applied Thermal Engineering 84(Supplement C):237-245, 2015, doi:10.1016/j.applthermaleng.2015.03.041.
- Zheng, Z., Liu, C., Tian, X., and Zhang, X., “Numerical Study of the Effect of Piston Top Contour on GDI Engine Performance under Catalyst Heating Mode,” Fuel 157(Supplement C):64-72, 2015, doi:10.1016/j.fuel.2015.04.054.
- Banerjee, R. and Kumar, S., “Numerical Investigation of Stratified Air/Fuel Preparation in a GDI Engine,” Applied Thermal Engineering 104(Supplement C):414-428, 2016, doi:10.1016/j.applthermaleng.2016.05.050.
- Saw, O.P. and Mallikarjuna, J.M., “Effect of Spark Plug and Fuel Injector Location on Mixture Stratification in a GDI Engine - A CFD Analysis,” IOP Conference Series: Materials Science and Engineering 243(1):012025, 2017, doi:10.1088/1757-899X/243/1/012025.
- Oh, H. and Bae, C., “Effects of the Injection Timing on Spray and Combustion Characteristics in a Spray-Guided DISI Engine under Lean-Stratified Operation,” Fuel 107(Supplement C):225-235, 2013, doi:10.1016/j.fuel.2013.01.019.
- Marseglia, G., Costa, M., Catapano, F., Sementa, P. et al., “Study about the Link between Injection Strategy and Knock Onset in an Optically Accessible Multi-Cylinder GDI Engine,” Energy Conversion and Management 134(Supplement C):1-19, 2017, doi:10.1016/j.enconman.2016.12.012.
- Costa, M., Sorge, U., Merola, S., Irimescu, A. et al., “Split Injection in a Homogeneous Stratified Gasoline Direct Injection Engine for High Combustion Efficiency and Low Pollutants Emission,” Energy 117(Part 2):405-415, 2016, doi:10.1016/j.energy.2016.03.065.
- Saw, O. P., Karaya, Y., and Mallikarjuna, J. M. “Effect of Fuel Injection Pressure on Mixture Stratification in a GDI Engine - A CFD Analysis,” “SAE Technical Paper 2017-01-2317,” 2017, doi:10.4271/2017-01-2317.
- Costa, M., Sorge, U., and Allocca, L., “Numerical Study of the Mixture Formation Process in a Four-Stroke GDI Engine for Two-Wheel Applications,” Simulation Modelling Practice and Theory 19(4):1212-1226, 2011, doi:10.1016/j.simpat.2010.07.006.
- Addepalli, K.S. and Mallikarjuna, J.M., “Effect of Engine Parameters on Mixture Stratification in a Wall- Guided GDI Engine - A Quantitative CFD Analysis,” SAE International Journal of Commercial Vehicles 10(2):562-571, 2017, doi:10.4271/2017- 01-0570.
- Costa, M., Marchitto, L., Merola, S.S., and Sorge, U., “Study of Mixture Formation and Early Flame Development in a Research GDI (Gasoline Direct Injection) Engine through Numerical Simulation and UV-Digital Imaging,” Energy 77(Supplement C):88-96, 2014, doi:10.1016/j.energy.2014.04.114.
- Addepalli, S.K., and Mallikarjuna, J. M. “Parametric Analysis of a 4-stroke GDI Engine using CFD,” Alexandria Engineering Journal., (2016), doi:10.1016/j.aej.2016.10.007.
- Converge v2.2.0, Theory Manual, Convergent Science Inc., 2015.
- Costa, M., Sorge, U., and Allocca, L., “CFD Optimization for GDI Spray Model Tuning and Enhancement of Engine Performance,” Advances in Engineering Software 49(Supplement C):43-53, 2012, doi:10.1016/j.advengsoft.2012.03.004.
- Addepalli, S. K., Saw, O. P., and Mallikarjuna, J. M. “Effect of Mixture Distribution on Combustion and Emission Characteristics in a GDI Engine - A CFD Analysis,” SAE Technical Paper 2017-24-0036,” 2017, doi:10.4271/2017-24-0036.
- Versteeg, H. K, and Malalasekera W., “An Introduction to Computational Fluid Dynamics,” Longman scientific and technical publication, 1995, 11-25.
- Krishna, A. S., Mallikarjuna, J. M., Davinder, K., and Babu, Y. R. “In-Cylinder Flow Analysis in a Two-Stroke Engine - A Comparison of Different Turbulence Models Using CFD,” “SAE Technical Paper 2013-01-1085,” 2013, doi:10.4271/2013-01-1085.
- Krishna, A. S., and Mallikarjuna J. M., “Optimization of Fuel Injection Timing in a GDI Engine to Reduce Emissions - A CFD Analysis”, International Conference on Development of Smart Cities. Interface, Governance and Technology, September 9-10, 2016, Dr. Ambedkar Institute of Technology, Bengaluru, India.
- Gnana Sagaya Raj, A.R., Mallikarjuna, J.M., and Ganesan, V., “Energy Efficient Piston Configuration for Effective Air Motion - A CFD Study,” Applied Energy 102(Supplement C):347-354, 2013, doi:10.1016/j.apenergy.2012.07.022.
- Krishna, A. S. and Mallikarjuna, J. M., “Effect of Fuel Injector Location on the Equivalence Ratio near the Spark Plug in a GDI Engine - A CFD Analysis,” 24th National conference on I.C. Engines and Combustion, 30 Oct - 1 Nov 2015, Dehradun, India.