Brunel University Research Archive (BURA) >
College of Engineering, Design and Physical Sciences >
Dept of Mechanical Aerospace and Civil Engineering >
Dept of Mechanical Aerospace and Civil Engineering Theses >

Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/6970

Title: Investigation of soot processes in an optical diesel engine
Authors: Menkiel, Barbara
Advisors: Ganippa, L
Keywords: Soot particle size
Soot particle distribution
Biofuel
Soot concentration
Laser induced incandescence
Publication Date: 2012
Publisher: Brunel University School of Engineering and Design PhD Theses
Abstract: This study is dedicated to investigation of soot formed during combustion in diesel engine. Measurements were performed in a high speed direct injection optical diesel engine. Initially soot particle size, size distribution and soot volume fraction were investigated using time resolved laser induced incandescence (TR-LII) technique. For this study standard diesel fuel was used and measurements were performed for various injection timing and two different engine loads. Investigation showed that TR-LII is a powerful tool that can be used for characterization of in-cylinder soot in the engines. Subsequently TR-LII technique was developed to measure in-cylinder soot in two dimensional plane (planar laser induced incandescence PLII) and technique was combined with high speed imaging to investigate soot processes for ultra-low sulfur diesel (ULSD) and bio-fuel (RME). Two injection strategies of single and double injection were applied during these measurements. A high speed imaging technique was used to study the soot formation and oxidation during the combustion process within the cylinder and PLII was applied later in the stroke to study qualitatively the relative amount of un-oxidised soot that was left in the combustion chamber. In addition to PLII, TR-LII technique was used simultaneously to explore crank angle resolved variation of primary soot particle size and their size distribution during the expansion stroke. The same measurements were repeated for fuels with different composition investigating the relationship between the fuel properties and soot emission. Finally mathematical model for soot particle size and distribution width was modified by introducing assumption of multi-lognormal in-cylinder soot particle size distribution.
Description: This thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel University
URI: http://bura.brunel.ac.uk/handle/2438/6970
Appears in Collections:Mechanical and Aerospace Engineering
Dept of Mechanical Aerospace and Civil Engineering Theses

Files in This Item:

File Description SizeFormat
FullTextThesis.pdf7.59 MBAdobe PDFView/Open

Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.