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International Symposium on Imaging in Transport Processes.
May, 25-29, 1992, Athens, Greece

DOI: 10.1615/ICHMT.1992.IntSympImgTranspProc


ISBN Print: 978-1-56700-012-2

IMAGING OF SPRAY AND FLAME IN RECIPROCATING ENGINES

pages 463-470
DOI: 10.1615/ICHMT.1992.IntSympImgTranspProc.420
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要約

The liquid fuel injected with a high injection pressure into the combustion chamber of a diesel engine undergoes atomization, evaporation, mixing with air and combustion. The quantitative measurements of these processes are essential to understand and control the combustion phenomena. The qualitative observation of the high speed pictures of these phenomena has been conducted since the 1930s. In the past decade, however, several techniques of the quantitative analysis of sprays and flames have become possible due to the significant progress in the imaging and data processing equipment.
This report is intended to describe principles of the imaging techniques of sprays and flames in diesel engines which we have developed so far. The techniques include line-of-sight extinction measurements of spray droplets and soot in the flame and two dimensional (2D) scattering imaging of spray droplets, fuel vapor and soot particles in flames. These 2D imaging techniques feature the use of a pulsed laser sheet as the incident light source. Some of the data and images obtained by these techniques will be also presented.

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