Two-dimensional imaging of high-speed transient sprays

Takeyuki Kamimoto

doi:10.1117/12.209629

30 May 1995 Two-dimensional imaging of high-speed transient sprays

Takeyuki Kamimoto

Proceedings Volume 2513, 21st International Congress on: High-Speed Photography and Photonics; (1995) https://doi.org/10.1117/12.209629
Event: High-Speed Photography and Photonics: 21st International Congress, 1994, Taejon, Korea, Republic of

Abstract

The liquid fuel injected at 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. This article summarizes recent work that has been performed by the author's group at Tokyo Institute of Technology in the field of 2D imaging diagnostics of diesel fuel sprays. The work was concentrated on enhancing the capabilities of quantitative measurement by 2D imaging techniques which use a pulsed laser sheet as the incident light source. Experiments were conducted applying these techniques to nonevaporating, evaporating, and combusting sprays achieved in the optically accessible chamber of a rapid compression machine. One of the most exciting outcomes is the 2D quantitative measurement of local dropsize distribution in a spray: The fluorescence and scattering intensities from droplets in a spray were imaged simultaneously and their ratio yielded a successful 2D particle sizing. Another application of the 2D imaging is the time and space resolved measurement of fuel vapor concentration in a transient spray. Selected 2D contour mappings of droplet size, fuel vapor concentration and soot concentration are presented.

Citation Download Citation

Takeyuki Kamimoto "Two-dimensional imaging of high-speed transient sprays", Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); https://doi.org/10.1117/12.209629

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