Thesis-2000-Haste.pdf (23.37 MB)
An investigation of in-cylinder flow and combustion in a spark ignition engine using particle image velocimetry
thesis
posted on 2018-09-17, 15:27 authored by Martin J. HasteEngine manufactures are currently seeking to develop spark ignition engines that are more fuel
efficient, more refined and produce lower amounts of polluting emissions. To achieve these
objectives an improved understanding of the factors governing the combustion process is
required. Engine in-cylinder fluid motion is known to fundamentally affect fuel–air mixture
preparation and flame propagation. Therefore, characterisation and quantification of the in-cylinder
flow is an important step in the process of achieving the conditions necessary for
optimal combustion.
This thesis reports the application of two-colour Particle Image Velocimetry (PIV) to measure
extended velocity fields within the combustion chamber of a firing production geometry optical
engine. Two-colour PIV was used to obtain high spatial resolution fluid velocity maps for a
range of crank angles and engine conditions. PIV measurements were obtained in the unburned
gas ahead of the propagating flame and a combustible seeding material was used to clearly
define the burned gas region. Data is presented for both the normal 2-valve running conditions
and with one inlet port deactivated for both open-valve and closed-valve fuel injection timing. [Continues.]
History
School
- Mechanical, Electrical and Manufacturing Engineering
Publisher
© M.J. HastePublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2000Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en