La Modélisation multidimensionnelle des écoulements dans les moteursThierry Baritaud Editions TECHNIP, 1999 - 164 pages With an increasingly challenging commercial environment, and the need imposed by safety principles to reduce both fuel consumption and pollutant emissions, the development of new engines can now benefit from the advances of computational fluid dynamics. Engine CFD is a most challenging simulation problem. This is caused by the spread of time and space scales, the excursion amplitude of most parameters, the high quasi-cyclic unstationarity of engine flows, the importance of minor geometry details, the number of physical and chemical processes including turbulent combustion and multi-phase flows to model. However, engine CFD has now reached a state where it has become a widely used tool, not only for engine understanding, but also increasingly for engine design. Undoubtedly, laser diagnostics in optical access engines have also brought significant help.Contents: 1. State of the art of multi-dimensional modeling of engine reacting flows. 2. Simulation of the intake and compression strokes of a motored 4-valve SI engine with a finite element code. 3. A parallel, unstructured-mesh methodology for device-scale combustion calculations. 4. Large-eddy simulation of in-cylinder flows. 5. Simulation of engine internal flows using digital physics. 6. Automatic block decomposition of parametrically changing volumes. 7. Developments in spray modeling in diesel and direct-injection gasoline engines. 8. Cyto-fluid dynamic theory of atomization processes. 9. Influence of the wall temperature on the mixture preparation in DI gasoline engines. 10. Simulation of cavitating flows in diesel injectors. 11. Recent developments in simulations of internal flows in high pressure swirl injectors. 12. 3D simulation of DI diesel combustion and pollutant formation using a two-component reference fuel. 13. Modeling of NOx and soot formation in diesel combustion. 14. Multi-dimensional modeling of combustion and pollutants formation of new technology light duty diesel engines. 15. 3D modeling of combustion for DI-SI engines. 16. Combustion modeling with the G-equation. 17. Multi-dimensional modeling of the aerodynamic and combustion in diesel engines. 18. CFD aided development of a SI-DI engine. 19. CFD engine applications at FIAT research centre. 20. Application of a detailed emission model for heavy duty diesel engine simulations. 21. CFD based shape optimization of IC engine. |
Table des matières
Section 1 | 148 |
Section 2 | 182 |
Section 3 | 183 |
Section 4 | 202 |
Section 5 | 218 |
Section 6 | 263 |
Section 7 | 282 |
Section 8 | 303 |
Section 9 | 309 |
Expressions et termes fréquents
applications ATDC Atomization ball valve Baritaud breakup CAD BTDC calculations cavitation cell CFD code chemical combustion chamber Combustion Institute combustion model common rail compression computational computational fluid dynamics Crank angle cylinder pressure density DI-SI engine Diesel Engines Diesel Sprays Digital Physics Direct Injection droplet emissions engine cycles enthalpy equivalence ratio exhaust experimental flame flamelet flow field Fuel Injection Gasoline Direct Injection GDI engine geometry Gosman grid ignition impingement in-cylinder flows injector inlet intake port interaction kinetic Kiva-II laminar liquid film mass fraction mesh mixture fraction modèle modélisation momentum moteurs motion Navier-Stokes equations nozzle numerical methods O'Rourke operating conditions optimization oxidation particles piston bowl premixed Reitz SAE Paper scalar dissipation rate scales shape shown in Figure simulation soot source terms spray model Star-CD subgrid-scale surface swirl temperature tr/min transport equation turbulence model turbulent flow variable velocity volume fraction wall