Modifications in Commercial Diesel Engines to Perform Under Difficult Respiration Conditions

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Moussavi Torshizi, Abolfazl | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39955 (08)
University: Sharif University of Technology
Department: mechanical engineering
Advisor(s): Durali, Mohammad
Abstract:
In this project we are about to adopt a method for implementing commercial diesel engines (truck and bus engines) in applications with difficult respiration condition like what happens in a submarine. To this end, working conditions of such engines are introduced and standard constraints are explained. Then the structure of already manufactured submarine engines is presented. At this point an engine from known manufacturers was selected for calculations to be performed on it. Since test and measurement equipments were not yet ready, simulation using computer software (GT-POWER v6.1) was selected as the solving method. First, the engine was modeled in its nominal working conditions. After validating simulation results, the engine was exposed to snorkel conditions. Simulations have shown that lack of air is the main cause of dramatic power loss and engine high temperature. Consideration and comparison of all air inducing methods, led to the selection of supercharging as the most efficient method. Applying this method to the engine showed that it can surpass standard requisites
Keywords:
Simulation ; Intake Depression ; Diesel Engines ; Back Pressure ; Exhaust Gases ; Supercharging

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