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Injector Dynamic and Nozzle Flow Features in Multiple Injection Modeling
Technical Paper
2007-24-0038
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper deals with the integrated modeling of a multiple injection common rail system. The aim of the numerical investigation is to capture the behavior of the multiple injections, in terms of electro-injector dynamic and nozzle flow development. In detail, the multiple injection investigation focuses on the transient phenomena of the injector, in order to evaluate their role on the definition of two aspects of the injection strategy, the fuel rate time evolution and their influence on the nozzle flow features. The model is based on the integration of two different commercial codes. In the simulations, a 0/1-D code has been used to analyze the complete injection system. The results obtained from the injection system simulation, in terms of injection needle lift, injection flow rate, pressure time evolution, have been used as boundary conditions for the 3-D CFD computation tool, in which the numerical investigation of the internal injector flow has been performed. Such an investigation is thought to highlight the exit flow features that play a significant role in the break-up process.
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Chiatti, G., Chiavola, O., and Palmieri, F., "Injector Dynamic and Nozzle Flow Features in Multiple Injection Modeling," SAE Technical Paper 2007-24-0038, 2007, https://doi.org/10.4271/2007-24-0038.Also In
References
- Catania, A. Ferrari, A. Spessa, E. “Numerical-Experimental Study and Solutions to Reduce the Dwell Time Threshold for Fusion-Free Consecutive Injections in a Multijet Solenoid-Type C.R. System” ICES2006 ASME Paper No. 1369
- Baratta, M. Catania, A. Ferrari, A. “Hydraulic Circuit Design Keys to Remove the Dependence of the Injected Fuel Amount on Dwell Time in Multi-Jet C.R. Systems” ICES2006 ASME Paper No. 1426
- Catania, A. Ferrari, A. Manno, M. Spessa, E. “Experimental Investigation of Dynamics Effects on Multiple-Injection Common Rail System Performance” ICES2005 ASME Paper No. 1108
- Catania, A. Ferrari, A. Manno, M. “Development and Application of a Complete Common-Rail Injection System Mathematical Model for Hydrodynamic Analysis and Diagnostics” ICES2005 ASME Paper No. 1018
- Mulemane, A. Han, J.S. Lu, P.H. Yoon, S.Y. Lai, M.C. “Modelling Dynamic Behavior of Diesel Fuel Injection Systems” SAE Paper No. 2004-01-0536
- Wang, T.C. Han, J.S. Xie, X.B. Lai, M.C. Henein, N.A. Schwarz, E. Bryzik, W. “Parametric Characterization of High-Pressure Diesel Fuel Injection Systems” J. Engineering in Gas Turbine & Power 125 412 426 2003
- Chiavola, O. Giulianelli, P. “Modeling and Simulation of Common-Rail Systems” SAE Paper No. 2001-01-3183
- Roth, H. Gavaises, M. Arcoumanis, C. “Cavitation Initiation, Its Development and Link with Flow Turbulence in Diesel Injector Nozzles” SAE Paper No. 2002-01-0214
- Arcoumanis, C. Flora, H. Gavaises, M. Kampanis, N. “Investigation of Cavitation in a Vertical Multi-Hole Injector” SAE Paper No. 1999-01-0524
- Gavaises, M. Andriotis, A. “Cavitation Inside Multi-hole Injectors for Large Diesel Engines and Its Effects on the Near-nozzle Spray Structure” SAE Paper No. 2006-01-1114
- Fezzaa, K. Lee, W.K. Cheong, S. Powell, C.F. Wang, J. Li, M. Lai, M.C. “High Pressure Diesel Injection Studied by Time-Resolved X-Ray Phase Contrast Imaging” ICES2006 ASME Paper No. 1409
- Han, J.S. Lu, P.H. Xie, X.B. Lai, M.C. Henein, N.A. “Investigation of Diesel Spray Primary Breakup and Development for Different Nozzle Geometries” SAE Paper No. 2002-01-2775
- Tatschl, R. Künsberg-Sarre, C. Alajbegovic, A. Winklhofer, E. “Diesel Spray Modeling Including Multidimensional Cavitation Nozzle Flow Effects” Proc. of ILASS Europe Conference Sept. 11-13 Darmstadt, Germany 2000
- Giannadakis, E. “Modelling of Cavitation in Automotive Fuel Injector Nozzles” Imperial College London, UK 2006
- Chiavola, O. Palmieri, F. “Coupling Codes for Nozzle Flow Modeling in Diesel Injection Systems” ICES2006 ASME Paper No. 1414
- Chiavola, O. Palmieri, F. Chiatti, G. “Integrated Modeling of Fuel Influence on Common Rail Injection System Performance” ICEF2006 ASME Paper No. 1556
- Chiavola, O. Palmieri, F. “Modeling Needle Motion Influence on Nozzle Flow in High Pressure Injection System” SAE Paper No. 2007-01-0250
- Imagine AMESim v4.2 Tutorial and User Guide AMESim Technical Bullettins
- FIRE v8.4 CFDWM Guide AVL List GmBH
- Zielke W. “Frequency-dependent friction in transient pipe flow” Trans. ASME J. Basic Engng 90 109 115 1968
- Samada K. Richards C.W. et al. “A finite element model of hydraulic pipelines using an optimized interlacing grid system” ImechE 1993
- FIRE v8.4 Multiphase Manual AVL List GmBH
- Hinze, J.O. “Turbulence” 2 nd McGraw-Hill New York 1975
- Franklin, R.E. McMillan, J. “Noise Generation in Cavitating Flows” J. Fluids Eng. 106 336 341 1984