Theoretical and Experimental Investigations of Turbocharger Matching on a Naturally Aspirated Diesel Engine

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Shams Derakhshan, Mohamad Amin | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42800 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Hajilouy Benisi, Ali
Abstract:
Diesel engines have widely used in past hundred years. During this time costly and extensive researches have been done to improve engine performance, which is going on. Important issues of these engines are higher specific power and efficiency and lower specific fuel consumption and pollutions formation. One of the best methods for engine performance improvement is matching a convenient turbocharger on engine. A turbocharger increases the engine air mass flow rate by increasing the inlet pressure and density. Due to increase of fresh air mass flow rate, fuel mass flow rate and power would increase. The aim of this research is to choose the convenient turbocharger for the OM355 naturally aspirated diesel engine and turn it to a turbocharged one. For this, 1-D computer simulation software is used and simulation results are validated with experimental results of Sharif University Turbocharging lab. Finally, by selecting a proper turbocharger, the engine power increases about 50% and specific fuel consumption decreases about 4%. More over, effects of exhaust manifold geometry, ambient condition and intercooler on performance parameters of turbocharged diesel engine are investigated.
Keywords:
Turbocharging ; Modeling ; Gas Fuelled Engine ; Turbocharger Matching ; Naturally Aspirated Diesel Engine

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