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A Cycle-to-Cycle Variation Extraction Method for Flow Field Analysis in SI IC Engines Based on Turbulence Scales
Technical Paper
2019-01-0042
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
To adhere to stringent environmental regulations, SI (spark ignition) engines are required to achieve higher thermal efficiency. In recent years, EGR (exhaust gas recirculation) systems and lean-burn operation has been recognized as key technologies. Under such operating conditions, reducing CCV (cycle-to-cycle variation) in combustion is critical to the enhancement of overall engine performance. Flow-field CCV is one of the considerable factors affecting combustion in engines. Conventionally, in research on flow fields in SI engines, the ensemble average is used to separate the measured velocity field into a mean component and a fluctuation component, the latter of which contains a CCV component and a turbulent component. To extract the CCV of the flow field, previous studies employed spatial filter, temporal filter, and POD (proper orthogonal decomposition) methods. Those studies used a constant- separation filter size for the whole crank angle, although the turbulence scales change rapidly during the intake and compression stroke processes. Hence the definition of filter size has some room to be explored in order to take account of these features. The objective of this research is to improve the method of separating the CCV component using turbulence scales. For this purpose, high-speed PIV measurement was conducted on the symmetrical vertical plane for an optical IC engine at repetition rates of 12 kHz (1 C.A. deg. resolution) for the whole in-cylinder area and 48 kHz (0.25 C.A. deg. resolution) for the plug position. The measured data were separated into CCV and turbulent components by using the proposed filter, whose size was selected adaptively considering the integral time scale of the turbulent flow. The effect of time resolution on the filter size was then elucidated.
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Matsuda, M., Yokomori, T., Minamoto, Y., Shimura, M. et al., "A Cycle-to-Cycle Variation Extraction Method for Flow Field Analysis in SI IC Engines Based on Turbulence Scales," SAE Technical Paper 2019-01-0042, 2019, https://doi.org/10.4271/2019-01-0042.Data Sets - Support Documents
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References
- Arcoumanis , C. and Whitelaw , H. Fluid Mechanics of Internal Combustion Engines: A Review Part C: Mech. Eng. Sci. 201 57 74 1987 10.1243/PIME_PROC_1987_201_087_02
- Takahashi , D. , Nakata , K. , Yoshihara , Y. , and Omura , T. Combustion Development to Realize High Thermal Efficiency Engines SAE Int. J. Engines 9 3 1486 1493 2016 10.4271/2016-01-0693
- Wada , Y. , Nakano , K. , Mochizuki , K. , and Hata , R. Development of a New 1.5L I4 Turbocharged Gasoline Direct Injection Engine SAE Technical Paper 2016-01-1020 2016 10.4271/2016-01-1020
- Schulza , C. and Sick , V. Tracer-LIF Diagnostics: Quantitative Measurement of Fuel Concentration, Temperature and Fuel/Air Ratio in Practical Combustion Systems Progress in Energy and Combustion Science 31 1 75 121 2005 10.1016/j.pecs.2004.08.002
- Bode , J. , Schorrb , J. , Krüger , C. , Dreizler , A. et al. Influence of Three-Dimensional In-Cylinder Flows on Cycle-to-Cycle Variations in a Fired Stratified DISI Engine Measured by Time-Resolved Dual-Plane PIV Proceedings of the Combustion Institute 36 3477 3485 2017
- Müller , S. , Böhm , B. , Gleißner , M. , Arndt , S. et al. Analysis of the Temporal Flame Kernel Development in an Optically Accessible IC Engine Using High-Speed OH-PLIF Appl Phys B 100 447 452 2010 10.1007/s00340-010-4134-3
- Pope , S. Turbulent Flows Cambridge University Press 2000
- Tennekes , H. and Lumley , J. A First Course in Turbulence The MIT Press 1972
- Towers , P. and Towers , E. Cyclic Variability Measurements in IC Engine In-Cylinder Flows Using High Speed PIV Meas. Sci. Technol. 15 1917 2004 10.1088/0957-0233/15/9/032
- Okura , Y. , Segawa , M. , Onimaru , H. , Urata Y. et al. Analysis of In-Cylinder Flow for a Boosted GDI Engine Using High Speed Particle Image Velocimetry 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics Lisbon 2014
- Aleiferis , P.G. , Behringer , M.K. , and Malcolm , J.S. Integral Length Scales and Time Scales of Turbulence in an Optical Spark-Ignition Engine Flow Turbulence Combust 98 523 577 2017 10.1007/s10494-016-9775-9
- Reuss , D. Cyclic Variability of Large-Scale Turbulent Structures in Directed and Undirected IC Engine Flows SAE Technical Paper 2000-01-0246 2000 10.4271/2000-01-0246
- Muller , H.R.S. , Bohml , B. , Gleißner , M. , Grzeszik , R. et al. Flow Field Measurements in an Optically Accessible Direct-Injection Spray-Guided Internal Combustion Engine Using High-Speed PIV Exp. Fluids 48 281 290 2010 10.1007/s00348-009-0742-2
- Karhoff , D. , Bücker , I. , Klaas , M. , and Schröder , W. Time-Resolved Stereoscopic PIV Measurements of Cyclic Variations in an Internal Combustion Engine 10th International Symposium on Particle Image Velocimetry - PIV13 2013
- Vu , T. and Guibert , P. Proper Orthogonal Decomposition Analysis for Cycle-to-Cycle Variations of Engine Flow. Effect of a Control Device in an Inlet Pipe Exp. Fluids 52 1519 1532 2012 10.1007/s00348-012-1268-6
- Kolmogorov , A.N. A Refinement of Previous Hypotheses Concerning the Local Structure of Turbulence in a Viscous Incompressible Fluid at High Reynolds Number J. Fluid Mech. 13 82 85 1962
- Pinsky , M. , Shapiro , M. , Khain , A. , and Wirzberger , H. A Statistical Model of Strains in Homogeneous and Isotropic Turbulence Physica D: Nonlinear Phenomena 191 3-4 297 313 2004 10.1016/j.physd.2003.12.008
- Mi , J. , Xu , M. , and Zhou , T. Reynolds Number Influence on Statistical Behaviors of Turbulence in a Circular Free Jet Phy. Fluids 25 075101 2013 10.1063/1.4811403
- Tang , S.L. , Antonia , R.A. , Djenidi , L. et al. Reappraisal of the Velocity Derivative Flatness Factor in Various Turbulent Flows J. Fluid Mech. 847 244 265 2018 10.1017/jfm.2018.307
- Jung , D. , Sasaki , K. , Sugata , K. , Matsuda , M. et al. Combined Effects of Spark Discharge Pattern and Tumble Level on Cycle-to-Cycle Variations of Combustion at Lean Limits of SI Engine Operation SAE Technical Paper 2017-01-0677 2017 10.4271/2017-01-0677
- Matsuda , M. , Yokomori , T. , and Iida , N. Investigation of Cycle-to-Cycle Variation of Turbulent Flow in a High-Tumble SI Engine SAE Technical Paper 2017-01-2210 2017 10.4271/2017-01-2210
- Shimura , M. , Yoshida , S. , Osawa , K. , Minamoto , Y. et al. Micro Particle Image Velocimetry Investigation of Near-Wall Behaviors of Tumble Enhanced Flow in an Internal Combustion Engine International Journal of Engine Research 2018 10.1177/1468087418774710