Journal ArticleDOI
Holographic flow visualization of time-varying shock waves
TLDR
Rapid-double-exposure, diffuse-illumination holography is evaluated analytically and experimentally as a flow visualization method for time-varying shock waves for transonic compressor rotor cases.Abstract:
Rapid-double-exposure, diffuse-illumination holography is evaluated analytically and experimentally as a flow visualization method for time-varying shock waves. Conditions are determined that minimize the distance (localization error) between the surface or curve of interference-fringe localization and the shock surface. Treated specifically are the cases of shock waves in a transonic compressor rotor for which there is laser anemometer data for comparison and shock waves in a flutter cascade.read more
Citations
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Book ChapterDOI
Holographic Interferometry or Fringe Interpretation
TL;DR: In this paper, the authors investigated the deformation of an opaque body with a diffusely reflecting surface and proposed a method to determine the spatial variation of the index of refraction of a transparent medium.
Journal ArticleDOI
Holographic cinematography of time-varying reflecting and time-varying phase objects using a Nd:YAG laser.
TL;DR: The holographic system discussed is intended for three-dimensional flow visualization of the time-varying flows that occur in jet-engine components.
Proceedings ArticleDOI
A Comparison of Electronic Heterodyne Moire Deflectometry and Electronic Heterodyne Holographic Interferometry for Flow Measurements
Arthur J. Decker,Josef Stricker +1 more
TL;DR: In this article, the first derivative of the interferometric fringe shift was measured using a large crystal of KD*P, whose refractive index distribution can be changed accurately and repeatably for the comparison.
Evaluation of diffuse-illumination holographic cinematography in a flutter cascade
TL;DR: In this article, the effects of turbulence on shock-wave visualization in a transonic flow are discussed, and the depth of field for visualization of a turbulent structure is demonstrated to be a measure of the relative density and scale of that structure.
References
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Journal ArticleDOI
The Mach interferometer applied to studying an axially symmetric supersonic air jet.
TL;DR: The Mach interferometer has been used to study a supersonic air jet, and the method of adjustment, measurement, and evaluation of interferograms, calculation of densities, and typical results are given.
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