Optical Studies of Spray Development and Combustion Characterization of Oxygenated and Fischer-Tropsch Fuels

Ochoterena, Raul Lima; Larsson, Monica; Denbratt, Ingemar

doi:10.4271/2008-01-1393

Cited by 25 publications

(17 citation statements)

References 13 publications

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“…Shadowgraph/schlieren techniques therefore provide important information about the temperature and composition of the system. In addition to high-speed shadowgraph/schlieren imaging of diesel sprays [3][4][5], single-shot shadowgraph/schlieren imaging has been applied to diesel sprays using short-pulse light sources [9][10][11][12].…”

Section: Shadowgraphmentioning

confidence: 99%

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Visualization of Diesel Spray Penetration, Cool-Flame, Ignition, High-Temperature Combustion, and Soot Formation Using High-Speed Imaging

Pickett

Kook

Williams

2009

SAE Int. J. Engines

197

129

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Shadowgraph/schlieren imaging techniques have often been used for flow visualization of reacting and nonreacting systems. In this paper we show that high-speed shadowgraph visualization in a high-pressure chamber can also be used to identify cool-flame and hightemperature combustion regions of diesel sprays, thereby providing insight into the time sequence of diesel ignition and combustion. When coupled to simultaneous high-speed Mie-scatter imaging, chemiluminescence imaging, pressure measurement, and spatially-integrated jet luminosity measurements by photodiode, the shadowgraph visualization provides further information about spray penetration after vaporization, spatial location of ignition and hightemperature combustion, and inactive combustion regions where problematic unburned hydrocarbons exist. Examples of the joint application of high-speed diagnostics include transient non-reacting and reacting injections, as well as multiple injections. Shadowgraph and schlieren image processing steps required to account for variations of refractive index within the hightemperature combustion vessel gases are also shown.

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Section: Shadowgraphmentioning

confidence: 99%

“…For example, shadowgraph/schlieren and natural luminosity imaging yield information about spray penetration, spreading angle, ignition delay time, ignition location, and soot formation (e.g., [1][2][3][4][5]). Such information is needed, and widely used, for improvement of multi-dimensional CFD codes developed for spray combustion.…”

Section: Introductionmentioning

confidence: 99%

Visualization of Diesel Spray Penetration, Cool-Flame, Ignition, High-Temperature Combustion, and Soot Formation Using High-Speed Imaging

Pickett

Kook

Williams

2009

SAE Int. J. Engines

197

129

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show abstract

“…High-pressure, high-temperature test rigs simulated the diesel engine conditions at the injection time and they have been used to study the behaviour of the liquid and vapour phases and the fuels properties effects [15e17]. In particular, the continuous penetration of the liquid phase has been related to the density, viscosity, and surface tension; while the droplet parts are mainly influenced by the fuel volatility [15]. Investigations on the penetration of the liquid-and vapour-phases inside diesel engines have been carried out on pure biodiesel and blends at diverse percentages [16] as well as for single components fuels [17] where a relationship between chemical-physical properties and spray evolution has been attempted.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of RME (rapeseed methyl ester) and mineral diesel fuels behaviour in quiescent vessel and EURO 5 engine

Allocca

Mancaruso

Montanaro

et al. 2014

Energy

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“…is the constant pressure flow rig (CPFR). Only a few of such rigs are mentioned in the literature [16][17][18][19][20]. In these test rigs a constant flow of hot, pressurized gas is set up in a pipe (with internal thermal insulation).…”

Section: Introductionmentioning

confidence: 99%

Design and Operation of a High Pressure, High Temperature Cell for HD Diesel Spray Diagnostics: Guidelines and Results

Baert¹,

Frijters²,

Somers³

et al. 2009

SAE Technical Paper Series

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The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. ABSTRACTThis paper first compares strengths and weaknesses of different options for performing optical diagnostics on HD diesel sprays. Then, practical experiences are described with the design and operation of a constant volume test cell over a period of more than five years. In this test rig, pre-combustion of a lean gas mixture is used to generate realistic gas mixture conditions prior to fuel injection. Spray growth, vaporization are studied using Schlieren and Mie scattering experiments. The Schlieren set-up is also used for registration of light emitted by the combustion process; this can also provide information on ignition delay and on soot lift-off length. The paper further describes difficulties encountered with image processing and suggests methods on how to deal with them. Results are presented that illustrate the wide range of capabilities of this test-rig when combined with high speed video registration, in particular its potential for studying issues related to vaporizing fuel spray dynamics.

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Optical Studies of Spray Development and Combustion Characterization of Oxygenated and Fischer-Tropsch Fuels

Cited by 25 publications

References 13 publications

Visualization of Diesel Spray Penetration, Cool-Flame, Ignition, High-Temperature Combustion, and Soot Formation Using High-Speed Imaging

Visualization of Diesel Spray Penetration, Cool-Flame, Ignition, High-Temperature Combustion, and Soot Formation Using High-Speed Imaging

Evaluation of RME (rapeseed methyl ester) and mineral diesel fuels behaviour in quiescent vessel and EURO 5 engine

Design and Operation of a High Pressure, High Temperature Cell for HD Diesel Spray Diagnostics: Guidelines and Results

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