Dependence of exposure time on flow velocity and turbulence for interferograms of heat and mass transfer along a flat plate in a parallel air streamâ€"limits of application of different shutters

Seizo Kato; Fritz Eisfeld

doi:10.1117/12.967807

1 March 1983 Dependence of exposure time on flow velocity and turbulence for interferograms of heat and mass transfer along a flat plate in a parallel air streamâ€"limits of application of different shutters

Seizo Kato, Fritz Eisfeld

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Proceedings Volume 0348, 15th Intl Congress on High Speed Photography and Photonics; (1983) https://doi.org/10.1117/12.967807
Event: 15th International Congress on High Speed Photography and Photonics, 1982, San Diego, United States

Abstract

A real-time holographic interferometry is applied to obtain microscopic behaviors of heat and mass transfer in the thin boundary layer along a flat plate in a parallel air stream, in which the physical situation changes instantaneously and spatially. The flat plate is heated or wetted, and is tested in the regimes of laminar and turbulent flows. Interferometric pictures are taken photographically in different exposure times. The obtained results are discussed mainly to find out the dependence of exposure time on free stream velocity and turbulence fluctuation, and to establish practically the optimum expo-sure time with good resolution, under the condition that the temperature and mass concentration gradients change greatly in the thin boundary layer.

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Seizo Kato and Fritz Eisfeld "Dependence of exposure time on flow velocity and turbulence for interferograms of heat and mass transfer along a flat plate in a parallel air streamâ€"limits of application of different shutters", Proc. SPIE 0348, 15th Intl Congress on High Speed Photography and Photonics, (1 March 1983); https://doi.org/10.1117/12.967807

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KEYWORDS

Turbulence

Interferometry

Camera shutters

Convection

Holographic interferometry

Beam splitters

High speed photography

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