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SI-Engine Design Concept for Reducing Cyclic Variations
Technical Paper
2005-01-0992
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fluid-dynamic principle for obtaining relatively stable combustion is found by performing cycle-resolved computations of turbulent flows in engines. Cycle-resolved computations are performed by using the implicit large eddy simulation (ILES) code, which we have proposed earlier. Calculations over continuous cycles show us the existence of “silent domain” in the engine cylinder, having weak cyclic-variations of flow. Time-dependent velocities averaged over six cycles, mean velocities, are also small in the silent domain. Moreover, we examine further on why cyclic variations of flow is weaker in the silent domain. This brings us a way for controlling cyclic variations for several engines.
Authors
Citation
Naitoh, K., Kaneko, Y., and Iwata, K., "SI-Engine Design Concept for Reducing Cyclic Variations," SAE Technical Paper 2005-01-0992, 2005, https://doi.org/10.4271/2005-01-0992.Also In
Combustion and Flow Diagnostics, and Fundamental Advances in Thermal and Fluid Sciences
Number: SP-1971; Published: 2005-04-11
Number: SP-1971; Published: 2005-04-11
References
- Amsden A. O'Rourke P. J. Butler T. D. KIVA-II, a computer program for chemically-reactive flows with sprays 1989
- Taghave R. Dupont A. Assessment of chamber and inlet port designs using multidimensional flow modeling IMechE 1989
- Naitoh K. Ono M. Kuwahara K. Egon K. Cycle-resolved computations of compressible turbulence in engine Proc. of 2 nd Int. Conf. of Computational Fluid Dynamics 2002 SAE paper 2002-01-2694 2002
- Naitoh K. Kuwahara K. Large eddy simulation and direct simulation of compressible turbulence and combusting flows in engines based on the BI-SCALES method J. of Fluid Dynamics Research 10 1992 299 325
- Naitoh K. Kuwahara K. Jeschke M. Krause E. Numerical Simulation of the Small Vortices in the Intake and Compression Processes of an Engine JSME International J. 35 4 1992 549 558
- Naitoh K. Takagi Y. Kuwahara K. Cycle-resolved computation of compressible turbulence and premixed flame in an engine Computers & Fluids 22 4 5 1993 623 648
- Naitoh K. Takagi Y. Kuwahara K. Krause E. Ishii K. Three-dimensional computation of transition to turbulence in a reciprocating engine 89 1886 1989
- Naitoh K. Fujii H. Takagi Y. Kuwahara K. Numerical simulation of the detailed flow in engine ports and cylinders SAE Paper 900256 1990
- Aris R. Vectors, Tensors, and Basic Equations of Fluid Mechanics Prentice-Hall 1962
- Naitoh K. et al Cycle-resolved computations of compressible flow in engine SAE paper 2002-01-2692 2002
- Naitoh K. Initial Flame Propagation stabilized by the Analysis of G-equation SAE paper, 2002-01-2732 2002
- Williams F. A. Combustion theory 2nd Benjamin/Cummings Pub. Co. Menlo Park, California 1985
- Ashurst W. M. Sivashinsky G.I. Yakhot V. Flame front propagation in nonsteady hydrodynamic fields Combust. Sci. and Tech. 62 1988 273 284
- Metghalchi M. Keck J.C. Laminar burning velocity of mixtures of air with methanol, iso-octane, indolene at high pressure and temperature Combust. Flame 48 1982 191 210
- Naitoh K. et al Cycle-resolved Large Eddy Simulation of actual 4-valve Engine based on Quasi-gridless Approach SAE paper 2004-01-3006 2004
- Naitoh K. Cyclic variation analysis of initial flame propagation process in a model engine SAE paper 2004-01-3007 2004
- Naitoh K. et al. LES for reducing cyclic variations in SI Engine Proceedings of autumn meeting of Society of Automotive Engineers of Japan 2004
- Kaneko Yuji Mr. April 2005 Iwata Kazuya Mr. April 2005