Journal
POWDER TECHNOLOGY
Volume 234, Issue -, Pages 46-57Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2012.09.034
Keywords
Particle jet; Powder injection; Dispersion; Image analysis
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Funding
- Christian-Doppler Research Association
- Austrian Federal Ministry of Economy, Family and Youth
- Austrian National Foundation for Research, Technology and Development
- voestalpine Stahl Donawitz GmbH
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The present work deals with dispersion experiments of highly laden particle jets in turbulent cross-Flow. While measurement techniques like phase-doppler anemometry (PDA) work well for dilute gas-particle Flows and can deliver particle velocity and concentration, all these methods fail in measuring physical quantities for cases with high particle volume fractions. Nevertheless validation and calibration of numerical simulation models covering this Flow regime require experimental data. Due to the strong interaction between the dispersion behavior and cross-Flow turbulence the experimental data should provide high spatial and temporal resolution. This is achieved by the use of a high-speed camera, which inherently leads to huge amounts of image data. To be able to process the recorded images automatically a simple image processing method is presented which is based on analyzing single pixel lines at a given distance downstream of the injection lance. The strength of this method lies in the fact that it is not dependent on any preset factors and can therefore cover a large range of mass loadings. The presented experiments are well reproducible and are able to picture different Flow regimes. (C) 2012 Elsevier B.V. All rights reserved.
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