Izvestiya MGTU MAMIIzvestiya MGTU MAMI2074-05302949-1428Moscow Polytechnic University6959610.17816/2074-0530-69596Computational study on the influence of dimethyl ether additive in methane/air mixture as an alternative fuel on the combustion process of HCCI engineMahmoud Mohamed El-Ghobashy El-Hagar-Университет Бени-Суэйф, г. Бени-Суэйф, Египет; Mechanical Power Engineering Department Industrial Education College Beni-Suef University, Egyptm_elhagar@yahoo.com <mailto:m_elhagar@yahoo.com>Mechanical Power Engineering Department Industrial Education College Beni-Suef University, Egypt2001201042697230042021Copyright © 2010, Mahmoud Mohamed El-Ghobashy El-Hagar -.2010The influence of dimethyl ether additive in methane−air mixture on the combustion process of HCCI engine is reported. Computational experiment has been conducted on two models of the working process of HCCI engine. One of them is a single-zone chemical-kinetic model and the other is a mathematical model based on formal chemical kinetics. The results of the numerical experiment are supported by data from full-scale experiment.HCCI enginecombustion processmathematical modelHCCI двигательпроцесс горенияматематическая модель[Gong X., The effects of DTBP on the oxidation of SI PRF-a study in an HCCI engine and in a pressurized flow reactor //Thesis, Drexel Univ., US, 2005.][Launder B. E., Spalding D. B. Lectures in Mathematical Models of Turbulence // Academic Press, London, 1972.][Ogink R., Computer Modeling of HCCI Combustion // Thesis, Chalmers Univ., Sweden, 2004.][Golovitchev VI, Pilia ML, Bruno C. Autoignition of methane mixtures: the effect of hydrogen peroxide. J Propul Power 1996; 12(4):699-707.][Golovitchev VI, Chomiak J. Evaluation of ignition improvers for methane autoignition. Combust Sci Technol 1998;135:31-47.][Zamansky VM, Borisov AA. Promotion of high-temperature selfignition. Progress Energy Combust Sci 1992;18:297-325.][Agarwal A, Assanis DN. Modeling the effect of natural gas composition on ignition delay under compression ignition conditions. SAE Paper 971711, 1997.]