Warianty tytułu
Języki publikacji
Abstrakty
Large Eddies Simulation method (LES) has become a powerful computational tool with application to turbulent flows. It links classical Reynolds Averaged Navier-Stokes (RANS) approach and Direct Numerical Simulation (DNS). This modeling approach computes the large eddies explicitly in a time-dependent simulation using the filtered Navier-Stokes equations. LES resolves the large flow scales that depend directly on the geometry where small scales are modeled by the sub-grid-scale models. LES is expected to improve the description of the aerodynamic and combustion processes in Internal Combustion Engines. With LES it is possible to resolve the essential part of the flow energy, yielding reliable results. Proper predictions depend on the quality of sub-grid-scale (SGS) models. In this paper the computational analysis is compared with experimental results in constant volume chamber. In that way there is a possibility to see the difference in results of initial flame kernel development and laminar flame speed. The calculations were made for two different combustion models. This allows to compare the experimental and simulation results for RANS (Fire ECFM combustion model) and LES (Fire) method and make further improvement in LES combustion model for application in full engine simulation.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
223-232
Opis fizyczny
Bibliogr. 17 poz., rys., tab.
Twórcy
autor
autor
autor
- Institute of Heat Engineering, Warsaw University of Technology, 00-665 Warsaw, Nowowiejska 21/25, pjawor@itc.pw.edu.pl
Bibliografia
- [1] Amsden, A.A, O'Rourke, P.J., Butler, T.D., KIVA-II: a computer program for chemically reactive flows with sprays, Los Alamos National Laboratory Report LA-11560-MS, 1989.
- [2] Khalighi, B., El Tahry, S.H., Haworth, D.C., Huebler, M.S., Computation and measurement of flow and combustion in a four-valve engine with intake variations "SAE Paper", 1995 No. 950287.
- [3] El Tahry, S.H., Haworth, D.C., A perspective on the state-of-the-art in IC engine combustion modeling, In: SIAM Sixth International Conference on Combustion, New Orleans, LA, 1996.
- [4] Haworth, D.C., El Tahry, S.H., Huebler, M.S., A global approach to error estimation and physical diagnostics in multidimensional computational fluid dynamics, "Int. J. Num. Methods in Fluids", 1993,17:75±97.
- [5] Moureau, V., Barton, I., Angelberger, C., Poinsot, T.: Towards Large Eddy Simulation in Internal- Combustion Engines: simulation of a compressed tumble flow, "SAE International", 2004-01-1995.
- [6] Celik, I., Yavuz, I., Smirnov, A, Large Eddy Simulations of In-Cylinder Turbulence for IC Engines, "A Review. Int. Journal of Engine Research", 2001 Vol. 2, No. 2.
- [7] Hawortha, D.C., Jansenb, K., Large-eddy simulation on unstructured deforming meshes: towards reciprocating IC engines, "Computers & Fluids", 2000, 29 ,pp. 493-524.
- [8] Oran, E.S., Boris, J.P., Numerical Simulation of Reactive Flow, 2nd edition, Cambridge University Press, 2001.
- [9] Molkov, V., Makarov, D., Modelling and Large Eddy Simulation of Deflagration Dynamics in a Closed Vessel, "Combustion, Explosion, and Shock Waves", 2004 Vol. 40, No. 2, pp. 136-144.
- [10] Molkov, V., Makarov, D., Grigorash, A, Cellular structure of explosion flames: modelling and large eddy simulation, "Combust. Sci. Tech.", 2004, 176851-85.
- [11] Molkov, V.V., Makarov, D.V., Schneider, H., LES modelling of an unconfined large-scale hydrogen- air deflagration, "Journal of Physics D: Applied Physics", 2006, 39, 4366.
- [12] Metghalchi, M., Keck, J.C., Burning Velocities of Mixtures of Air with Methanol, Isooctane and Indolene at High Pressure and Temperature, "Combustion and Flame", 1982,48, pp. 191-210.
- [13] Liao, S.Y., Jiang, D.M., Cheng, Q., Huang, Z.H., Wej, Q., Investigation of the Cold-Start Combustion Characteristics of Ethanol-Gasoline Blends in a Constant-Volume Chamber, "Energy Fuels", 2005, 19(3), pp. 813-819.
- [14] Liao, S.Y., Jiang, D.M., Cheng, Q., Huang, Z.H., Zeng, K., Determination of the laminar burning velocities for mixtures of ethanol and air at elevated temperatures, "Applied Thermal Engineering" 2007,27, pp. 374-380.
- [15] Bayraktar, H., Experimental and theoretical investigation of using gasoline-ethanol blends in spark- ignition engines, "Renewable Energy", 2005, 30, pp. 1733 - 1747.
- [16] Konnov, A.A, Meuwissen, R.J., de Goey, L.P.H., The temperature dependence of the laminar burning velocity of ethanol flames, "Proceedings of the Combustion Institute", 2011, 33, pp. 10 11-10 19.
- [17] Fire v2009 - ICE Physics & Chemistry Users Guide, 08.0205.2009.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BWM4-0040-0029