Comparative evaluation of pongamia biodiesel with open and re-entrant combustion chambers in a DI diesel engine
Journal Title: International Journal of Automotive Engineering and Technologies - Year 2014, Vol 3, Issue 2
Abstract
The influence of 20% blend of Pongamia Oil Methyl Ester (POME20) as alternative diesel fuel has been studied using a kirloskar made single cylinder, four stroke, direct injection diesel engine. Without altering the compression ratio of the engine, the piston’s combustion chamber geometry was modified to have Shallow depth combustion chamber, Toroidal combustion chamber, Shallow depth re-entrant type combustion chamber and Toroidal re-entrant type combustion chamber from the standard Hemispherical open type combustion chamber. Performance and emission tests were conducted for these five types of combustion chamber geometries to study the performance characteristics such as brake thermal efficiency, brake specific fuel consumption and emission characteristics such as unburned hydrocarbons, carbon monoxide, oxides of nitrogen and smoke emissions. The test results showed that substantially higher brake thermal efficiency and lower specific fuel consumption for toroidal re-entrant type combustion chamber. Sharp reduction of particulates, carbon monoxide and unburnt hydrocarbons were observed for toroidal re-entrant type combustion chamber compared to the other two. On the other hand oxides of nitrogen (NOx) were higher for toroidal re-entrant type combustion chamber.
Authors and Affiliations
S. Jaichandar| Dept. of Mechanical Engineering, Easwari Engineering College, Chennai, Tamilnadu, India, K. Annamalai| Dept. of Automobile Engineering, Madras Institute of Technology, Anna University, Chennai, Tamilnadu, India, P. Arikaran| Dept. of Mechanical Engineering, Easwari Engineering College, Chennai, Tamilnadu, India
Keywords
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