Analysis of Simultaneous Velocity and Density Distributions for High-Speed CO2 Flow Using Particle Image Velocimetry and Digital Speckle Tomography

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Velocity and density distributions of a high-speed and initial CO2 jet flow have been analyzed simultaneously by a developed three-dimensional digital speckle tomography and a particle image velocimetry (PIV). Three high-speed cameras have been used for the tomography and the PIV since a shape of a nozzle for the jet flow is asymmetric and the initial flow is fast and unsteady. The speckle movements between no flow and CO2 jet flow have been obtained by a cross-correlation tracking method so that those distances can be transferred to deflection angles of laser rays for density gradients. The three-dimensional density fields for the high-speed CO2 jet flow have been reconstructed from the deflection angles by the real-time tomography method, and the two-dimensional velocity fields have been calculated by the PIV method simultaneously.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

55-58

DOI:

10.4028/www.scientific.net/KEM.326-328.55

Citation:

H. S. Ko et al., "Analysis of Simultaneous Velocity and Density Distributions for High-Speed CO2 Flow Using Particle Image Velocimetry and Digital Speckle Tomography", Key Engineering Materials, Vols. 326-328, pp. 55-58, 2006

Online since:

December 2006

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Price:

$35.00

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DOI: 10.1088/0957-0233/12/8/332

[3] Verhoeven, D., 1993, Limited-data computed tomography algorithms for the physical sciences, Applied Optics, Vol. 32, pp.3736-54.

DOI: 10.1364/ao.32.003736

[4] Ko, H.S. and Kihm, K. D., 1999, An Extended Algebraic Reconstruction Technique (ART) for Density-Gradient Projections: Laser Speckle Photographic Tomography, Exper. Fluids, Vol. 27, pp.542-50.

DOI: 10.1007/s003480050378

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