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http://dx.doi.org/10.5855/ENERGY.2013.22.4.399

Influence of piston bowl geometry on the in-cylinder flow of HCCI Engine  

Nam, Seung Man (School of Mechanical Engineering, Chungbuk National University)
Lee, Kye Bock (School of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of Energy Engineering / v.22, no.4, 2013 , pp. 399-405 More about this Journal
Abstract
The gas motion inside the engine cylinder plays a very important role in determining the thermal efficiency of an internal combustion engine. A precise information of in-cylinder three dimensional complex gas motion is crucial in optimizing engine design. Homogeneous charge compression ignition (HCCI) engine is a combustion concept, which is a hybrid between Otto and Diesel engine. The turbulent diffusion leads to increased rates of momentum, heat and mass transfer. The in-cylinder turbulence flow was found to affect the present HCCI combustion mainly through its influence on the wall heat transfer. This study investigates the effect of piston geometry shape on the turbulent flow characteristics of in-cylinder from the numerical analysis using the LES model and the results obtained can offer guidelines of the combustion geometries for better combustion process and engine performance.
Keywords
Swirl; Turbulence; Squish; Combustion chamber; Homogeneous charge compression ignition;
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