Chemical species tomographic imaging of the vapour fuel distribution in a compression-ignition engine
File(s)IJER manuscript 0170725.pdf (1.36 MB)
Accepted version
Author(s)
Type
Journal Article
Abstract
This article reports the first application of chemical species tomography to visualise the in-cylinder fuel vapour concentration distribution during the mixing process in a compression-ignition engine. The engine was operated in motored conditions using nitrogen aspiration and fired conditions using a gasoline-like blend of 50% iso-dodecane and 50% n-dodecane. The tomography system comprises 31 laser beams arranged in a co-planar grid located below the injector. A novel, robust data referencing scheme was employed to condition the acquired data for image reconstruction using the iterative Landweber algorithm. Tomographic images were acquired during the compression stroke at a rate of 13 frames per crank angle degree within the same engine cycle at 1200 r min−1. The temperature-dependent fuel evaporation rate and mixing evolution were observed at different injection timings and intake pressure and temperature conditions. An initial cross-validation of the tomographic images was performed with planar laser-induced fluorescence images, showing good agreement in feature localisation and identification. This is the first time chemical species tomography using near-infrared spectroscopic absorption has been validated under engine conditions, and the first application of chemical species tomography to a compression-ignition engine.
Date Issued
2018-09-01
Online Publication Date
2018-09-01
2018-11-08T08:53:51Z
Date Acceptance
2017-07-28
ISSN
1468-0874
Publisher
SAGE Publications
Start Page
718
End Page
731
Journal / Book Title
International Journal of Engine Research
Volume
19
Issue
7
Copyright Statement
© IMechE 2017. The final, definitive version of this paper has been published in International Journal of Engine Research by Sage Publications Ltd. All rights reserved. It is available at: https://journals.sagepub.com/doi/10.1177/1468087417730214
Source Database
web-of-science
Sponsor
Commission of the European Communities
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000444085900002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
4550035396
Subjects
Science & Technology
Physical Sciences
Technology
Thermodynamics
Engineering, Mechanical
Transportation Science & Technology
Engineering
Transportation
Optical tomography
chemical species tomography
compression ignition
engine diagnostics
mixture preparation
HIGH-SPEED
COMBUSTION
FLUORESCENCE
TEMPERATURE
09 Engineering
Energy
Publication Status
Published
Date Publish Online
2017-09-11