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Optical diagnostics for soot and temperature measurement in diesel engines

Zhao, H; Ladommatos, N; (1998) Optical diagnostics for soot and temperature measurement in diesel engines. PROG ENERG COMBUST , 24 (3) 221 - 255.

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Abstract

This paper reviews the optical techniques for in-cylinder combustion temperature measurement, particularly soot measurements in diesel engines. The review starts with the two-colour method for in-cylinder soot and combustion temperature measurement. The principle and implementation of the two-colour technique are described in detail. Both signal point and full-field temperature and soot measurements by the two-colour method are considered. In the second part, the soot diagnostics based on light scattering, especially the light extinction method for in-cylinder soot concentration measurements, are discussed. In the third part, optical techniques for spatially resolved two-dimensional measurements of soot particles in diesel engines are introduced. Since laser induced incandescence (LII) is a relatively new technique and is particularly suitable for the two-dimensional imaging of soot distribution, the operating principle and implementation of LII are discussed in detail. At the end of each part, examples are given to illustrate the understanding gained about diesel combustion as a result of the application of these optical techniques. This paper provides a comprehensive review for those who are interested in using optical diagnostics for in-cylinder soot and combustion temperature measurement in diesel engines. (C) 1998 Elsevier Science Ltd. All rights reserved.

Type: Article
Title: Optical diagnostics for soot and temperature measurement in diesel engines
Keywords: soot, diesel combustion, optical diagnostics, two-colour method, light extinction, laser induced incandescence, LASER-INDUCED INCANDESCENCE, DIFFUSION FLAMES, VOLUME FRACTION, PARTICLES, VAPORIZATION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/106705
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