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Effect of Turbulence on HCCI Combustion
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
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This paper presents large eddy simulation (LES) and experimental studies of the combustion process of ethanol/air mixture in an experimental optical HCCI engine. The fuel is injected to the intake port manifolds to generate uniform fuel/air mixture in the cylinder. Two different piston shapes, one with a flat disc and one with a square bowl, were employed to generate different in-cylinder turbulence and temperature field prior to auto-ignition. The aim of this study was to scrutinize the effect of in-cylinder turbulence on the temperature field and on the combustion process. The fuel tracer, acetone, is measured using laser induced fluorescence (LIF) to characterize the reaction fronts, and chemiluminescence images were recorded using a high speed camera, with a 0.25 crank angle degree resolution, to further illustrate the combustion process. Pressure in the cylinder is recorded in the experiments. Spatial and temporal resolved LES was used to gain information on the turbulence mixing, heat transfer and combustion process. It was shown that gas temperature in the piston bowl is generally higher than that in the squish, leading to an earlier ignition in the bowl. Compared to the disc engine, the square bowl engine has a higher temperature inhomogeneity owing to the turbulence wall heat transfer. The experimentally observed higher combustion duration and slower pressure rise rate in the square bowl engine as compared to the disc engine can be explained by the higher temperature inhomogeneity in the square bowl engine.
- R. X. Yu - Division of Fluid Mechanics, Lund Institute of Technology
- X. S. Bai - Division of Fluid Mechanics, Lund Institute of Technology
- A. Vressner - Division of Combustion Engines, Lund Institute of Technology
- A. Hultqvist - Division of Combustion Engines, Lund Institute of Technology
- B. Johansson - Division of Combustion Engines, Lund Institute of Technology
- J. Olofsson - Division of Combustion Physics, Lund Institute of Technology
- H. Seyfried - Division of Combustion Physics, Lund Institute of Technology
- J. Sjöholm - Division of Combustion Physics, Lund Institute of Technology
- M. Richter - Division of Combustion Physics, Lund Institute of Technology
- M. Aldén - Division of Combustion Physics, Lund Institute of Technology
CitationYu, R., Bai, X., Vressner, A., Hultqvist, A. et al., "Effect of Turbulence on HCCI Combustion," SAE Technical Paper 2007-01-0183, 2007, https://doi.org/10.4271/2007-01-0183.
Homogeneous Charge Compression Ignition Engines, 2007
Number: SP-2100 ; Published: 2007-04-16
Number: SP-2100 ; Published: 2007-04-16
- Richter M., Franke A., Alden M., Hultqvist A., Johansson B., Optical diagnostics applied to naturally aspirated homogeneous charge compression ignition engine, SAE paper 1999-01-3649 (1999).
- Richter M., Franke A., Engstrom J., Hultqvist A., Johansson B., Alden M., The influence of charge inhomogeneity on the HCCI combustion process, SAE paper 2000-01-2868 (2000).
- Nygren J., Hult J., Richter M., Alden M., Christesen M., Hultqvist A., Johansson B., Proc. Combust. Inst. 28 (2002) 679-686.
- Hultqvist A., Christensen M., Johansson B., Richter M., Nygren J., Hult J., Alden M., The HCCI combustion process in a single cycle - speed fuel tracer LIF and chemiluminescence imaging, SAE paper 2002-01-0424.
- Sjöberg M., Dec J.E., Cernansky N.P., Potential of thermal stratification and combustion retard for reducing pressure-rise rates in HCCI engines, based on multi-zone modeling and experiments, SAE paper 2005-01-0113.
- Chen J.H., Hawkes E.R., Sankaran, R., Mason, S.D., Im. H.G., Combust. Flames 145 (2006) 128-144.
- Sankaran R., Im H.G., Combust. Theory Modelling 9 (3) (2005) 417-432.
- Yu, R., Bai, X.S., Lehtiniemi, H., Ahmed, S. S., Mauss, F., Richter, M., Aldén, M., Hildingsson, L., Johansson, B., Hultqvist, A.: “Effect of Turbulence and Initial Temperature Inhomogeneity on Homogeneous Charge Compression Ignition Combustion”, SAE 06-01-3318.
- Christensen, M., Johansson, B.: “The effect of in-cylinder flow and turbulence on HCCI operation”, SAE 2002-01-2864.
- Christensen, M., Johansson, B., Hultqvist, A.: “The effect of combustion chamber geometry on HCCI operation”, SAE 2002-01-0425.
- Kong, S.C., Reitz, R.D., Christensen, M., Johansson, B.: “Modeling the effect of geometry generated turbulence on HCCI engine combustion”, SAE 2003-01-1088.
- Aceves, S.M., Flowers, D.L., Martinez-Frias, J., Espinosa-Loza, F., Christensen, M., Johansson, B., Hessel, R.P.: “Analysis of the effect of geometry generated turbulence on HCCI combustion by multi-zone modeling”, SAE 2005-01-2134.
- Hessel, R.P., Aceves, S.M., Flowers, D.L.: “A comparison of the effect of combustion chamber surface area and in-cylinder turbulence on the evolution of gas temperature distribution from IVC to SOC: a numerical and fundamental study”, SAE 2006-01-0869.
- Lehtiniemi, H., Mauss, F., Balthasar, M., Magnusson, I.: “Modeling diesel engine combustion with detailed chemistry using a progress variable approach”, SAE 2005-01-3855.
- Marinov, N. M, “A Detailed Chemical Kinetic Model for High Temperature Ethanol Oxidation” Int. J. Chem. Kinet. 31:183-220 (1999).
- Yu, R., Nogenmyr, K.-J., Bai, X.S.: “LES of swirling turbulent methane/air flame”, ECCOMAS thematic conference on computational combustion, Lisbon, June 21-24, 2005.
- Gullbrand, J., Bai, X. S., and Fuchs, L.: “High Order Cartesian Grid Method for Calculation of Incompressible Turbulent Flows”, Int. J. of Numer. Methods in Fluids, vol. 36, pp. 687-709, 2001.
- Dec J.E., Hwang W., Sjöberg M., An investigation of thermal stratification in HCCI engines using chemiluminescence imaging, SAE paper 2006-01-1518.