Split-screen single-camera stereoscopic PIV application to a turbulent confined swirling layer with free surface
Abstract
An annular liquid wall jet, or vortex tube, generated by helical injection inside a tube is studied experimentally as a possible means of fusion reactor shielding. The hollow confined vortex/swirling layer exhibits simultaneously all the complexities of swirling turbulence, free surface, droplet formation, bubble entrapment; all posing challenging diagnostic issues. The construction of flow apparatus and the choice of working liquid and seeding particles facilitate unimpeded optical access to the flow field. A split-screen, single-camera stereoscopic particle image velocimetry (SPIV) scheme is employed for flow field characterization. Image calibration and free surface identification issues are discussed. The interference in measurements of laser beam reflection at the interface are identified and discussed. Selected velocity measurements and turbulence statistics are presented at Re_λ = 70 (Re = 3500 based on mean layer thickness).
Additional Information
© The Author(s) 2010. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. Received: 5 March 2009; Revised: 22 December 2009; Accepted: 11 January 2010; Published online: 29 January 2010. We thank Dr. Carolyn White for depositing a layer of gold-palladium onto the calibration targets.Attached Files
Published - Bardet2010p10875Exp_Fluids.pdf
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Additional details
- Eprint ID
- 19250
- Resolver ID
- CaltechAUTHORS:20100802-153311612
- Created
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2010-08-03Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field