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A Validated Numerical Simulation of Diesel Injector Flow Using a VOF Method
Technical Paper
2000-01-2932
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Progress in Diesel spray modelling highly depends on a better knowledge of the instantaneous injection velocity and of the hydraulic section at the exit of each injection hole. Additionally a better identification of the mechanisms which cause fragmentation is needed. This necessitates to begin with a precise computation of the two-phase flow which arises due to the presence of cavitation within the injectors.
For that aim, a VOF type interface tracking method has been developed and improved (Segment Lagrangian VOF method) which allows to describe numerically the onset and development of cavitation within Diesel injectors. Furthermore, experiments have been performed for validation purpose, on transparent one-hole injectors for high pressure injection conditions. Two different entrance geometries (straight and rounded) and various upstream and downstream pressure levels have been considered. This numerical approach allows to retrieve different cavitation regimes and a good agreement has been obtained for the discharge coefficients. Encouraging results have also been achieved concerning the emission frequency of the cavitation pockets at the injector exit. Then preliminary calculations have been performed on a VCO Diesel injector with needle displacement and an estimation of the injection velocity has been obtained for this configuration.
Finally, the VOF method has been applied to calculate directly the three phase flow (liquid and vapour Diesel fuel, and external gas) downstream the injector exit. This method should give better insight, in a near future, into the mechanisms of fragmentation.
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Marcer, R., Le Cottier, P., Chaves, H., Argueyrolles, B. et al., "A Validated Numerical Simulation of Diesel Injector Flow Using a VOF Method," SAE Technical Paper 2000-01-2932, 2000, https://doi.org/10.4271/2000-01-2932.Data Sets - Support Documents
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References
- Soteriou C. Andrews R. Smith M. “Direct injection Diesel sprays and the effect of cavitation and hydraulic flip on atomization” SAE Paper 950080 1995
- Fath A. Fettes C. Leipertz A. “Investigation of the Diesel spray break-up close to the nozzle at different injection conditions” 4th Int. Symp. COMODIA 98 1998
- Bruneaux G. “Liquid and vapor spray structure in high pressure common rail Diesel injection” Atomization and sprays 2000
- Lee E. Huh K. Koo J-Y. “Development of a Diesel spray atomization model considfering nozzle flow characteristics” Proc. ICLASS '97 Seoul August 18-22 1997
- Chaves H. Obermeier F. “Modelling the effect of modulations of the injection velocity on the structure of Diesel sprays” SAE 950426 1995
- Dumont N. Simonin O. Habchi C. “Cavitating flow in Diesel injectors and atomization: a bibliographical review” 8th Int. Conf. on liquid atomization and spray systems (ICLASS) Pasadena CA July 2000
- Chaves H. Knapp M. Kubitzek A. Obermeier F. Schneider T. “Experimental study of cavitation in the nozzle hole of Diesel injectors using transparent nozzles” SAE Paper 950290 1995
- Meingast U. Staudt M. Hohmann S. Renz U. “Untersuchung eines Common-Rail Einspritzstrahls im Düsennahbereich” Spray '98 Essen
- Winklhofer E. “Velocities and structure of atomizing Diesel sprays” ILASS Florence july 1997
- Bergwerk W. “Flow pattern in diesel nozzle spray holes” Proc. Instn. Mech. Engrs. 173 25 655 674 1959
- Ohrn T. Senser D. Lefebvre A. “Geometrical effects on discharge coefficients for plain-orifice atomizers” Atomization and Sprays 1 2 137 153 1991
- Genge O. Aachen 1998
- Karasawa T. Tanaka M. Abe K. Shiga S. Kurabayashi T. “Effect of nozzle configuration on atomization of a steady spray” Atomization and Sprays 2 411 426 1992
- Afzal H. Arcoumanis C. Gavaises M. Kampanis N. “Internal flow in Diesel injector nozzles: modelling and experiments” IMechE Int. Conf. on Fuel injection Systems London 1-2 december 1999
- Arcoumanis C. Badami M. Flora H. Gavaises M. “Cavitation in real-size multi-hole Diesel injector nozzles” SAE Paper 2000-01-1249 2000
- He L. Ruiz F. “Effect of cavitation on flow and turbulence in plain orifices for high-speed atomization” Atomization and Sprays 5 569 584 1995
- Lush P.A “Dynamics of cavities in a duct flow” Int. J. Heat and Fluid Flow 9 1 march 1988
- Schmidt D. Rutland C. Corradini M. Roosen P. Genge O. “Cavitation in two-dimensional asymmetric nozzles” SAE Paper 1999-01-0518 1999
- Alajbegovic A. “AVL's Two phase flow simulation activities - Status and Outlook” Fire user's meeting Graz 1999
- Henry M. Collicot S. Heister S. “Internal structure of cavitating slot flow” ILASS America Ottawa, Ontario 1997
- Kim J-H. Nishida K. Yoshizaki T. Hiroyasu H. “Characterization of flows in the sac chamber and the discharge hole of a D.I Diesel injection nozzle by using a transparent model nozzle” SAE Paper 972942 1997
- Arcoumanis C. Gavaises M. Nouri J. M. Abdul-Wahab E. Horrocks R. “Analysis of the flow in the nozzle of a vertical multi-hole Diesel engine injector” SAE Paper 980811 1998
- Tamaki N. Shimizu M. Nishida K. Hiroyasu H. “Effects of cavitation and internal flow on atomization of a liquid jet” Atomization and Sprays 8 179 197 1998
- Hiroyasu H. Arai M. Shimizu M. “Break-up length of a liquid jet and internal flow in a nozzle” Proc. of the 5th Int. Conf. on liquid atomization and spray system 275 282 1991
- Prescher K. Schaffitz W. 1979
- Eifler W. 1990
- Chaves H. Obermeier F. “Correlation between light absorption signals of cavitating nozzle flow within and outside of the hole of a transparent diesel injection nozzle” ILASS-Europe '98 Manchester 6-8 july 1998
- Favennec A.G Fruman D. “Effect of the needle position on the cavitation of Diesel injectors” 3rd ASME/JSME Joint Fluids engineering conference July 18-23 San Francisco, California
- Chaves H. Mulhem B. Obermeier F. “Comparison of high speed stroboscopic pictures of spray structures of a Diesel spray with numerical calculations based on a convective instability theory” ILASS-Europe '99 Toulouse 5-7 july 1999
- Nakahira T. Komori M. Nishida M. Tsujimura K. “The shock wave generation around the Diesel fuel spray with high pressure injection” SAE Paper 920460 1992
- Huh K.Y. Gosman D. “A phenomenological model of Diesel spray atomization” Proc. Int. Conf. on Multiphase flow Tsukuba, Japan 24-27 September 1991
- Arcoumanis C. Gavaises M. French V. “Effect of fuel injection processes on the structure of sprays” SAE Paper 970799 1997
- Kampmann S. Dittus B. Mattes P. Kirner M. “The influence of hydro grinding at VCO nozzles on the mixture preparation in a DI Diesel engine” SAE 960867 1996
- Ventikos Y. Tzabiras G. “A numerical study of the steady and unsteady cavitation phenomenon around hydrofoils” International Symposium on Cavitation 2-5 May Deauville, France 1995
- Delannoy B. Kueny H. “Two phase flow approach in unsteady cavitating modeling” ASME Cavitation and Multiphase flow forum 98 153 158 1990
- Schmidt D. Rutland J. Corradini M. “A numerical study of cavitating flow through various nozzle shapes” SAE 971597 1997
- Kubota A. Kato H. Yamaguchi H. “A new modeling of cavitat$d flow: a numerical study of unsteady cavitation on a hydrofoil section” J. Fluid Mech. 240 59 96 1992
- Chen Y. Heister S.D. “Modeling cavitating flows in diesel injectors” Atomisation and Sprays 6 709 726 1996
- Grogger H.A. Alajbegovic A. “Calculation of the cavitating Flow in venturi geometries using two fluid model” Proceed. Of FEDSM'98, ASME Fluids Eng. Division Summer Meeting June 21-25 Washington, D.C.,USA 1998
- Alajbegovic A. Grogger H.A. “Calculation of transient cavitation in nozzle using the two-fluid model” 12th Annual Conference on Liquid Atomization and Spray Systems May 16-19 Indianapolis, Indiana, USA 1999
- Von Dirke M. Krautter A. Ostertag J. Mennicken M. Badock C. “Simulation of cavitating flows in Diesel injectors” Multidimensional simulation of engine internal flows Rueil-Malmaison, France 1998
- Guignard S. Marcer R. Rey V. Fraunié P. “Solitary wave breaking on sloping beaches: two phase flow numerical simulat$on by SL-VOF method” Eur. J. of Mec. 1999
- Diéval L. Marcer R. Arnaud M. 1997
- Brackbill J.U. Kothe D.B. Zemach C. “A continuum method for modeling surface tension” J. Comp. Phys. 100 335 354 1992
- Kolcio K. Helmicki A.J. “Development of Equations of State for Compressible Liquids J.Propulsion 12 1 1995
- Viviand H. “Analysis of pseudo-compressibility systems for compressible and incompressible flows” Computational Fluid Dynamics, Review 1995 Wiley publishers Oshima Halez
- De Jouette C. Viviand H. Wornom S. Le Gouez J.M. “Pseudo compressibility method for incompressible flow calculation” 4 th International Symposium on Comp. Fluid Dyn., of California at Davis sept. 9-12 1991
- Jameson A. Schmidt A. Turkel E. “Numerical Solutions for the Euler Equations by finite volumes methods using Runge-Kutta Time-Marching Schemes” AIAA 14 Th. Fluid and Plasma Dyn., Conf. Palo Alto California June 1981
- Hirt C.W. Nichols B.D “Volume Of Fluid (VOF) Method for the Dynamics of Free Boundaries” J. of Comp. Physics 39 201 255 1981
- Li J. “Piecewise Linear Interface Calculation” C. R. Acad. Sci. Paris 391 396 1995
- Badock C. Wirth R. Tropea C. “The influence of hydro grinding on cavitation inside a Diesel injection nozzle and primary break-up under unsteady pressure conditions” ILASS-Europe '99 Toulouse July 5-7 1999
- Heimgärtner C. Leipertz A. “Investigation of the primary spray breakup close to the nozzle of a common-rail high pressure Diesel injection system” SAE 2000-01-1799
- Stojanoff C. Schaller J. Bilstein W. Aachen 19-20 3 1996
- Cossali G. Brunello G. Coghe A. “LDV characterization of air entrainment in transient Diesel sprays̈” SAE paper 910178 1991