This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Stroke-to-Bore Ratio on HCCI Combustion
Technical Paper
2010-01-0842
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper discusses the effects of stroke-to-bore (S/B) ratio on HCCI combustion. KIVA-3V, coupled with a multi-zone detailed chemical kinetics solver, is used to quantify the effects of changes in S/B ratio to heat transfer, thermal stratification and HCCI combustion. Three S/B ratios (0 5, 1.1 and 1.5) are analyzed. The results indicate that a cylinder with smaller S/B has more heat losses and lower thermal efficiency compared with a cylinder with larger S/B ratio, because of larger area-to-volume ratio near TDC. Moreover, the lowest S/B ratio case has a narrower temperature distribution before the onset of combustion. This leads to shorter burn duration, higher heat release rate and, consequently, increased knocking tendency. The emission results also favor the higher S/B ratio, with S/B=0.5 having the highest CO and HC emissions for relatively early combustion phasing; however, this trend is reversed as combustion is retarded.
Recommended Content
Authors
Citation
Lee, C., Goel, S., and Babajimopoulos, A., "The Effects of Stroke-to-Bore Ratio on HCCI Combustion," SAE Technical Paper 2010-01-0842, 2010, https://doi.org/10.4271/2010-01-0842.Also In
References
- Onishi, S. Jo, S.H. Shoda, K. Jo, P.D. Kato, S. “Active Thermo-Atmospheric Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines,” SAE Technical Paper 790501 1979
- Najt, P.M. Foster, D. E. “Compression-Ignited Homogeneous Charge Combustion,” SAE Technical Paper 830246 1983
- Thring, R.H. “Homogeneous Charge Compression Ignition (HCCI) Engines,” SAE Technical Paper 892069 1989
- Dec, J. “A Computational Study of the Effects of Low Fuel Loading and EGR on Heat Release Rates and Combustion Limits in HCCI Engines,” SAE Technical Paper 2002-01-1309 2002
- Willand, J. Nieberding, R.-G. Vent, G. Enderle, C. “The Knocking Syndrome: Its Cure and Potential,” SAE Technical Paper 982483 1998
- Sjöberg M. Dec, J.E. Babajimopoulos, A. Assanis, D.N. “Comparing Enhanced Natural Thermal Stratification Against Retarded Combustion Phasing for Smoothing of HCCI Heat-Release Rates,” SAE Technical Paper 2004-01-2994 2004
- Babajimopoulos, A. Assanis, D.N. Flowers, D.L Aceves, S.M. Hessel, R.P. “A fully coupled computational fluid dynamics and multi-zone model with detailed chemical kinetics for the simulation of premixed charge compression ignition engines,” International Journal of Engine Research 6 5 497 512 2005
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill Inc. Singapore 1988
- Filipi, Z.S. Assanis, D.N. “The Effect of Stoke-to-Bore Ratio on Combustion, Heat Transfer, and Efficiency of a Homogeneous Charge Spark Ignition Engine of Given displacement,” International Journal of Engine Research 1 2 191 208 2000
- Amsden, A.A. “KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves,” Los Alamos National Laboratory Report No. LA-13313-MS 1997
- Kee, R.J. Rupley, F.M. Miller, J.A. “CHEMKIN-II: A fortran chemical kinetics package for the analysis of gas-phase chemical kinetics,” Sandia Report SAND89-8009 1989
- Hessel, R.P. Foster, D.E. Aceves, S.M. Davisson, M.L. Espinosa-Loza, F. Flowers, D.L. Pitz, W.J. Dec, J.E. Sjöberg, M. Babajimopoulos, A. “Modeling Iso-octane HCCI Using CFD with Multi-Zone detailed Chemistry; Comparison to Detailed Speciation Data Over a Range of Lean Equivalence Ratios,” SAE Technical Paper 2008-01-0047 2008
- Park, H.J. Assanis, D.N. Jung, D. “Development of an In-Cylinder Heat Transfer Model with Compressibility Effects on Turbulent Prandtl Number, Eddy Viscosity Ratio and Kinematic Viscosity Variation,” SAE Technical Paper 2009-01-0702 2009
- Tham, Y. Bisetti, F. Chen, J.Y. “Development of a Highly Reduced Mechanism for Iso-Octane HCCI Combustion With Targeted Search Algorithm,” ASME Journal of Engineering for Gas Turbines and Power 130 042804-1 7 2008
- Curran, H.J. Gaffuri, P. Pitz, W.J. Westbrook, C.K. “A Comprehensive Modeling Study of iso-Octane Oxidation,” Combustion and Flame 129 253 280 2002
- Chang, J. Güralp, O. Filipi, Z. Assanis, D. Kuo, T.-W. Najt, P. Rask, R. “New Heat Transfer Correlation for an HCCI Engine Derived from Measurements of Instantaneous Surface Heat Flux,” SAE Technical Paper 2004-01-2996 2004
- Eng, J.A. “Characterization of Pressure Waves in HCCI Combustion,” SAE Technical Paper 2002-01-2859 2002