Analysis of Simultaneous Velocity and Density Distributions for High-Speed CO2 Flow Using Particle Image Velocimetry and Digital Speckle Tomography
| Periodical | Key Engineering Materials (Volumes 326 - 328) |
|---|---|
| Main Theme | Experimental Mechanics in Nano and Biotechnology |
| Edited by | Soon-Bok Lee and Yun-Jae Kim |
| Pages | 55-58 |
| DOI | 10.4028/www.scientific.net/KEM.326-328.55 |
| Citation | Han Seo Ko et al., 2006, Key Engineering Materials, 326-328, 55 |
| 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, Tomography |
| Price | US$ 28,- |
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.