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In the diesel engine cylinder, the air fuel mixture is not at rest, but is in highly turbulent condition. The turbulence breaks the filament of a flame into a ragged front, thus presenting a far greater area of surface from which hear is being radiated; hence its advance is speeded up enormously. The combustion process may be developed in two stages. One the growth and development of a self-propagating nucleus flame and the other the spread of the flame throughout the combustion chamber. The former is a chemical process depending upon the nature of the fuel, temperature and pressure, the proportion of the exhaust gas and also upon the temperature coefficient of the fuel.During the combustion, there is a rise of temperature and pressure due to the combustion of the fuel ignited. Both temperature and pressure combine to accelerate the velocity of the flame front in compressing the unburnt portion of the charge in the Knocking zone. Ultimately the temperature in this zone reaches such a high value feat chemical reaction proceed, at for grater rather than that at which the flame is advancing. Hence we have combustion accompanied by flame, producing a very high rate of pressure rise res
About the author
Completed my M.E in Mechanical Engineering from Anna University,Tamil Nadu, India. Pursuing my PhD in Thermal Engineering and the field of Research is IC engines. At present I am working as Professor, at Higher College of Technology, Muscat, Sultanate of Oman.
