Diesel combustion: In-cylinder NO concentrations in relation to injection timing

Verbiezen, K; Donkerbroek, AJ; Klein-Douwel, Rjh Robert; Vliet, AP van; Frijters, Pjm Peter; Seykens, Xlj Xander; Baert, Rsg Rik; Meerts, W. Leo; Dam, NJ Nico; Meulen, JJ ter

doi:10.1016/j.combustflame.2007.05.005

Cited by 43 publications

(18 citation statements)

References 22 publications

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“…Furthermore, the equivalence ratio of the premixed burnt mixture is typically too fuel rich for significant NO formation, as experimentally confirmed by Dec [6]. Similarly, local in-cylinder Laser-Induced Fluorescence (LIF) measurements by Verbiezen et al [7] showed very little NO formation up to the occurrence of the diffusion flame. The NO model follows the approach suggested by Murayama et al [5] over thirty years ago, but with some differences as listed in [4].…”

Section: Introductionmentioning

confidence: 83%

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Experimental Validation of Extended NO and Soot Model for Advanced HD Diesel Engine Combustion

Seykens

Baert

Somers

et al. 2009

SAE Int. J. Engines

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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. ABSTRACTA computationally efficient engine model is developed based on an extended NO emission model and state-ofthe-art soot model. The model predicts exhaust NO and soot emission for both conventional and advanced, high-EGR (up to 50 %), heavy-duty DI diesel combustion. Modeling activities have aimed at limiting the computational effort while maintaining a sound physical/chemical basis. The main inputs to the model are the fuel injection rate profile, in-cylinder pressure data and trapped in-cylinder conditions together with basic fuel spray information. Obtaining accurate values for these inputs is part of the model validation process which is thoroughly described. Modeling results are compared with single-cylinder as well as multi-cylinder heavy-duty diesel engine data. NO and soot level predictions show good agreement with measurement data for conventional and high-EGR combustion with conventional timing. NO FORMATION MODELThe present NO formation model was presented more thoroughly in [4]. This section contains a summary of the model. NO formation is only considered for the diffusive combustion phase. With conventional heavy-duty diesel combustion -usually -the majority of the fuel is burned in the diffusion controlled combustion phase.

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Section: Introductionmentioning

confidence: 83%

“…It is postulated that the fuel that burns as premixed does not lead to significant soot formation. Therefore, only the diffusive part of the heat release rate is used in equation (7). The fuel mass associated with the premixed burn is subtracted from the instantaneous fuel injection rate.…”

Section: Soot Formation Modelmentioning

confidence: 99%

Experimental Validation of Extended NO and Soot Model for Advanced HD Diesel Engine Combustion

Seykens

Baert

Somers

et al. 2009

SAE Int. J. Engines

View full text Add to dashboard Cite

show abstract

“…Weiser, in his doctor's thesis [11] , presents results of direct measurements on 9-cylinder, medium-speed engine. Works about comparing the emission characteristics of diesel engines with direct and indirect fuel injection [12], different types of fuels [12], injection strategies [13] - [16], and nozzle geometries [17] , are also available. The experimental investigations of diesel combustion with water emulsion [18], [19] and different fuel bio-components [20] - [30] and much frequently are presented.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine in Case of Cylinder Valves Leakage

Kowalski

2015

Polish Maritime Research

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“…Additional access to the combustion chamber is through windows in the liner close to the cylinder head (alternatively also a sapphire ring can be applied) and/or through windows in the cylinder head (sacrificing one or more of the valves). Several of such HD-size research engines have been presented in the literature [5][6][7][8][9]. In these test rigs combustion has been examined at imep levels up to 1.8 MPa, be it with a reduced compression ratio (and therefore lower pressure levels).…”

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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Diesel combustion: In-cylinder NO concentrations in relation to injection timing

Cited by 43 publications

References 22 publications

Experimental Validation of Extended NO and Soot Model for Advanced HD Diesel Engine Combustion

Experimental Validation of Extended NO and Soot Model for Advanced HD Diesel Engine Combustion

An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine in Case of Cylinder Valves Leakage

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

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