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Analysis of Spray/Wall Interaction Under Diesel Engine Conditions
Technical Paper
2000-01-0272
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
Detailed experimental investigation of the instationary spray/wall interaction in an injection chamber helps to better understand the fuel injection processes in small diesel engines. They are necessary to improve spray breakup and evaporation models in CFD simulations and furthermore they are useful to validate results of numerical simulation. Experiments using Phase-Doppler-Anemometry (PDA), lightsheet visualization tools, and surface thermocouples under diesel engine conditions show that spray/wall interaction takes place only about 3 mm above the surface. In this area the impinging fuel jet is redirected parallely to the wall and forms a dense wall jet. At the tip of the wall jet vortices with a high number of drops develop. Here the liquid phase is redirected again and will finally be concentrated in a layer up to a distance of a few millimeters above the surface. Depending on the injection parameters the impinging spray causes a wall heat flux up to more than 2 MW/m2 in the stagnation region. First numerical simulation of the process using a modified version of the CFD code FLUENT shows the capability of a general wall model to predict the spray penetration. Modeling the breakup processes due to the impact of drops on the wall will need further investigation.
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Authors
- Ulrich Meingast - Lehrstuhl für Wärmeübertragung und Klimatechnik, RWTH Aachen
- Michael Staudt - Lehrstuhl für Wärmeübertragung und Klimatechnik, RWTH Aachen
- Lars Reichelt - Lehrstuhl für Wärmeübertragung und Klimatechnik, RWTH Aachen
- Ulrich Renz - Lehrstuhl für Wärmeübertragung und Klimatechnik, RWTH Aachen
- F.-Arnd Sommerhoff - Ford Forschungszentrum Aachen GmbH
Topic
Citation
Meingast, U., Staudt, M., Reichelt, L., Renz, U. et al., "Analysis of Spray/Wall Interaction Under Diesel Engine Conditions," SAE Technical Paper 2000-01-0272, 2000, https://doi.org/10.4271/2000-01-0272.Also In
References
- Roisman, I. V.; Araneo, L.; Marengo, M.; Tropea, C.: Evaluation of Drop Impingement Models: Experimental and Numerical Analysis of a Spray Impact, ILASS Europe, 1999
- Fujimoto, H.; Senda, J.; Nagae, M.; Hasgimoto, A.: Characteristics of a Diesel Spray Impinging on a Flat Wall, Int. Symposium COMODIA 90, 193-198, 1990
- Hohmann, S.; Mattes, P.; Renz, U.; Schneemann, A.; Wirth, R.: Measurement of Droplet Size and Velocity in a DI-Diesel Spray Impinging on a Wall, ILASS Europe, 449-457, 1997
- Ebara, T.; Amagai, K.; Arai M.: Movement and Structure of Diesel Spray Impinging on an Inclined Wall, SAE Paper 970046, 1997
- Arcoumanis, C., Chang, J.-C.: Flow and Heat Transfer Characteristic of Impinging Transient Diesel Sprays, SAE Technical Paper 940678, 1994
- Mattes, P.: Untersuchung der Spray/Wand-Wechselwirkung am Beispiel der dieselmotorischen Gemischbildung, Dissertation Universität Stuttgart, 1998, ISBN 3-8265-4380-7
- FVV-Abschluβbericht zum Vorhaben Nr.649 Wandeinflüsse, 1998
- Leipertz, A.; Blumenröder, K.; Schünemann, E.; Peter, F.; Potz, D.: Wandeinflüsse auf Gemischbildung und Verbrennung bei kleinvolumigen DI-Dieselmotoren, MTZ, Vol. 60, 412-418, 1999
- Eckhause, J. E.; Reitz, R. D.:Modelling Heat Transfer to Impinging Fuel Sprays in Direct-Injection Engines, Atomization and Sprays, Vol. 5, 213-242, 1995
- Wolf, R. S.; Cheng, W.K.: Heat Transfer Characteristics of Impinging Diesel Sprays, SAE Technical Paper 890439, 1989
- FLUENT Users Guide V 4.48, FLUENT Inc., Centerra Resource Park, Lebanon, NH 03766, USA
- Hohmann, S.: Strahlausbreitung und Tropfenverdunstung bei der dieselmotorischen Direkteinspritzung, Dissertation RWTH Aachen, 1999, ISBN 3-8265-6246-1
- Gosman, A.D.; Ionannides, E.: Aspects of Computer Simulations of Liquid-Fueled combustors, J. Energy, Vol. 7, No. 6, 1983, 482 - 490
- Meingast, U.; Staudt, M.; Hohmann, S.; Renz, U.: Untersuchung eines Common-Rail Einspritzsstrahls im Düsennahbereich, Tagungsbeitrag SPRAY'98, 1998, ISBN 3-922602-68-1
- Chaves, H.; Knapp, M.; Kubizek, A. Obermeier, F.: High Speed Flow Measurements within an Injection Nozzle, Laser Anemometry Advances and Applicgations, Vol. 2052, 265-272, 1993
- Obermeier, F.: Model Development within the CEC-Programm JRC-IDEA, Max Planck Institut für Strömungsforschung, Göttingen, 1993
- Schneider, T.: Zur Modellierung der Zerstäubung von Flüssigkeitsfreistrahlen, Dissertation, Universität Dortmund, 1995
- Abramzon, B.; Sirignano, W.A.: Approximate Theory of a Single Droplet Vaporization in a Convective Field: Effects of Variable Properties, Stefan Flow and Transient Liquid Heating, Proc. 2nd ASME-JSME, Thermal Engng. Joint Conf., Vol. 1, 1987, 11-18
- Soave, G. Equilibrium Constants from a modified Redlich-Kwong equation of state,Chem. Engng. Sci., Vol. 42 (1972) 381-387
- Abramzom, B.; Sirignano, W.A. Droplet evaporation model for spray combustion calculations, Int. J. Heat Mass Transfer, Vol. 32, No. 9, (1989) 1605-1618
- Oesterle, B.; Petitjean, A.: Simulation of Particle-to-Particle Interactions in Gas-Solid Flows, Int. J. Multiphase Flow, Vol. 19, No. 1, 199-211, 1993
- Brazier-Smith, P. R.; Jennings, S. G.; Latham, J.: The Interaction of Falling Water Drops: Coalescence, Proc. R. Soc. Lond. A., Vol. 326, 393-408, 1972
- Mundo, Chr.; Sommerfeld, M.; Tropea, C.: Droplet-Wall Collisions: Experimental Studies of the Deformation and Breakup Process, Journal of Multiphase Flows, Vol. 21, 155-173,1992
- Mundo, Chr.; Sommerfeld, M.; Tropea, C.: On the Modelling of Liquid Sprays Impinging on Surfaces, Atomization and Sprays, Vol. 8, 625-652, 1998
- Stanton, D. W., Rutland, C. J.: Multi-Dimensional Modeling of Heat and Mass Transfer of Fuel Films Resulting from Impinging Sprays, SAE Technical Paper 980132, 1998
- Liu, Z.; Obokata, T.; Reitz, R. D.: Modeling Drop Drag Effects on Fuel Spray Impingement in Direct Injection Diesel Engines, SAE Technical Paper 970879, 1997