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Tumble Flow Analysis in an Unfired Engine Using Particle Image Velocimetry
Abstract:This paper deals with the experimental investigations of the in-cylinder tumble flows in an unfired internal combustion engine with a flat piston at the engine speeds ranging from 400 to 1000 rev/min., and also with the dome and dome-cavity pistons at an engine speed of 1000 rev/min., using particle image velocimetry. From the two-dimensional in-cylinder flow measurements, tumble flow analysis is carried out in the combustion space on a vertical plane passing through cylinder axis. To analyze the tumble flows, ensemble average velocity vectors are used and to characterize it, tumble ratio is estimated. From the results, generally, we have found that tumble ratio varies mainly with crank angle position. Also, at the end of compression stroke, average turbulent kinetic energy is more at higher engine speeds. We have also found that, at 330 crank angle position, flat piston shows an improvement of about 85 and 23% in tumble ratio, and about 24 and 2.5% in average turbulent kinetic energy compared to dome and dome-cavity pistons respectively
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1070387Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2120
 J. B. Heywood (1988), Internal Combustion Engine Fundamentals, Pub: McGraw Hill International Editions.
 B. Khalighi (1991), Study of the Intake Tumble Motion by Flow Visualization and Particle Tracking Velocimetry, Journal of Experiments in Fluids, Vol 10, pp.230 236.
 B. Xavier and F. Alain (1997), Investigation of the In-Cylinder Tumble Motion In a Multi Valve Engine: Effect of Piston Shape, Paper No. SAE 971643.
 C. Arcoumanis, C. S. Bae, and Z. Hu, Flow and Combustion in a Four- Valve, Spark-Ignition Optical Engine, Paper No. SAE 940475
 DAVIS 7.2: Software Manuals, LaVision, Germany, 2006.
 B. Murali Krishna and J. M. Mallikarjuna, "Optical Diagnosis of Flow through the Intake Valve in a Direct Injection Diesel Engine", Proceedings of the 15Th ISME International Conference on New Horizons of Mechanical Engineering (ISME-2008), March 18-20, Bhopal, India, 2008.
 M. Raffel, C. Willet and J. Kompenhans, Particle Image Velocimetry-A Practical Guide, Pub: Springer-Verlag Berlin Heidelberg, Germany, 1998.
 R.F. Huang, C.W. Huang, S.B. Chang, H.S. Yang, T.W. Lin, W.Y. Hsu, "Topological Flow Evolutions In-cylinder of A Motored Engine During Intake and Compression Stroke", Journal of Fluids and Structures, Vol 20, pp.105-127, 2005.
 Y. Li, H. Zhao and T. Ma, "Flow and Mixture Optimization for a Fuel Stratification Engine using PIV and PLIF Techniques", Journal of Physics: Conference Series, Vol 45, pp 59-68, 2006.