Soot Distribution in a D.I. Diesel Engine Using 2-D Laser-Induced Incandescence Imaging

Dec, John E.; Loye, A. O. zur; Siebers, Dennis L.

doi:10.4271/910224

Cited by 91 publications

(42 citation statements)

References 16 publications

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“…The first term of (15) is equivalent to (2). The models of Hofmann and Kock include the first, second, and last terms in this expression but assume that ̺ s does not vary with tem-…”

Section: Internal Energymentioning

confidence: 99%

“…LII involves heating particles with a highpower pulsed laser (usually with a pulse duration of several nanoseconds) and measuring the radiative emission from the hot particles. The magnitude of the signal depends on the particle volume fraction, making it a useful technique for measuring soot spatial and temporal distributions [1][2][3][4][5][6][7][8][9][10][11][12][13]. The signal decay rate depends on the specific surface area of the particles.…”

Section: Introductionmentioning

confidence: 99%

“…The models shown have been described previously [42]. Calculations were performed for an ambient temperature of 1800 K and a pressure of 1 bar, an excitation wavelength of 532 nm, a single primary particle with a diameter of 30 nm, and laser fluences of (a)0 .05 J/cm 2 and (b)0 .70 J/cm 2 . Model results were scaled to 1 at the maximum.…”

Section: Introductionmentioning

confidence: 99%

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Modeling laser-induced incandescence of soot: a summary and comparison of LII models

et al. 2007

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“…The first term of (15) is equivalent to (2). The models of Hofmann and Kock include the first, second, and last terms in this expression but assume that ̺ s does not vary with tem-…”

Section: Internal Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling laser-induced incandescence of soot: a summary and comparison of LII models

et al. 2007

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“…Government laboratories in the U.S., Europe and several universities (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) have undertaken laser imaging studies to define the structure of diesel flames and their temporal evolution. Although these diagnostics were performed on a variety of engine and high-pressure vessel configurations, they show many similarities and begin to form a basis for the general description of a burning diesel fuel spray plume.…”

mentioning

confidence: 99%

Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation

Flynn

Durrett

Hunter

et al. 1999

SAE Technical Paper Series

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330

201

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February 1999This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. PREPRINTThis paper was prepared for submittal to the DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 1999-01- Charles K. WestbrookLawrence Livermore National Laboratory ABSTRACT This paper proposes a structure for the diesel combustion process based on a combination of previously published and new results. Processes are analyzed with proven chemical kinetic models and validated with data from production-like direct injection diesel engines. The analysis provides new insight into the ignition and particulate formation processes, which combined with laser diagnostics, delineates the twostage nature of combustion in diesel engines. Data are presented to quantify events occurring during the ignition and initial combustion processes that form soot precursors.A framework is also proposed for understanding the heat release and emission formation processes.

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“…[6][7][8][9][10][11][12][13][14][15][16][17][18] In the LII technique, a pulsed high energy laser is used to heat soot to incandescence temperatures. With suitable spectral filtering and temporal collection, the emission from the laser-heated soot (which is blue-shifted and dramatically increased) may be distinguished relative to the non-laser heated soot and flame gases.…”

Section: Introductionmentioning

confidence: 99%

Laser-induced incandescence calibration via gravimetric sampling

Wal

Zhou

Choi

1996

Combustion and Flame

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Soot Distribution in a D.I. Diesel Engine Using 2-D Laser-Induced Incandescence Imaging

Cited by 91 publications

References 16 publications

Modeling laser-induced incandescence of soot: a summary and comparison of LII models

Modeling laser-induced incandescence of soot: a summary and comparison of LII models

Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation

Laser-induced incandescence calibration via gravimetric sampling

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