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Simulation Of The Internal Flow Characteristic OfDiesel Injector Using CFD Software

HUSIRAN, MOHD FAISAL (2004) Simulation Of The Internal Flow Characteristic OfDiesel Injector Using CFD Software. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Fuel injectors deliver fuel to cylinders of internal combustion (IC) engines. The fuel is sprayed through an injector nozzle, typically at high pressure, to improve the mixing of fuel with air and increase the combustion efficiency. Modern passenger cars and trucks use higher injection pressures than earlier models to improve the atomization of fuel in order to reduce the emission levels ofIC engines. Unfortunately, high operating pressures in diesel injectors can cause cavitation in the liquid fuel, leading to degradation in performance and structural damage to the injector. Because fuel injectors are typically small, experimental measurements of this phenomenon are difficult to make, so analysis through CFD is an appealing alternative. The project scope is mainly on the comparing the simulation results with experimental data (using a scaled up model). In particular, it is of interest to study the flow behaviour especially in determining the cavitation and atomization using CFD software, ANSYS 6.0. The methodology of project work consists of literature review, Gantt chart and simulation. The main objective of this project is to do simulation on internal flow of diesel fuel injector using ANSYS, then comparing and analysing the results for both experiment and simulation. Interpretation from the simulationresults lead to the better explanation for the cavitation and atomisation phenomena. Finally, at the end of this project the computational cost can be reduced by the simplification ofsimulation process. The simulations cover on the single-phase and 2 dimensional analyses which focus on the effect of the sharp and blunt inlet nozzle to the cavitation flow. Meanwhile, for the atomization and hydraulic flip flow, volume fraction analysis will be the best method to express the atomization flow as explain in the chapter 2. As conclusion for this project, ANSYS software is reliable to simulate the internal fluid flow problems and able to produce a quite accurate outcome (with some limitation) to assist in further study on the internal fluid flow behaviour.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Materials - Engineering materials - Metals alloys - Phase transformation
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:47
URI: http://utpedia.utp.edu.my/id/eprint/7702

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