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

Han Seo Ko; Yong Jae Kim; Oh Chae Kwon; Koji Okamoto

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

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 326-328Analysis of Simultaneous Velocity and Density...

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

Abstract:

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.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

55-58

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.55

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Online since:

December 2006

Authors:

Han Seo Ko, Yong Jae Kim, Oh Chae Kwon, Koji Okamoto

Keywords:

Carbon Dioxide CO₂, Digital Speckle System, Flow Visualization, Particle Image Velocimetry (PIV), PIV, Tomography

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References

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