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| Hauptseite > Publikationsdatenbank > Measurements and CFD Modeling of a Pulverzited Coal Flame With Emphasis on Ash Deposition |
| Hauptseite > Publikationsdatenbank > Measurements and CFD Modeling of a Pulverzited Coal Flame With Emphasis on Ash Deposition |
| Journal Article | FZJ-2016-02322 |
; ; ; ;
2016
Elsevier
New York, NY [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.fuel.2015.11.043
Abstract: Measurements of fly ash deposition in a 15 kW pulverized coal jet flame and CFD-based mathematical modeling have been performed. The deposits have been collected at two ports at particle Stokes numbers in the 0.02–0.34 range and particle kinetic energies not larger than 2×10-92×10-9 J. Inertial impaction and thermophoresis have been identified as main mechanisms of particle transport towards the deposition surfaces. Deposition rates on air-cooled probes (View the MathML source600–700°C surface temperature) have been measured to be 24% (Port 2) and 79.4% (Port 3) larger than those measured on uncooled probes (View the MathML source1150°C surface temperature) due to the enhanced role of thermophoresis. Complex dependencies of the deposition rate on the probe surface temperature and the probe location have been observed. The CFD-model predictions are able to reproduce these dependencies after adjustments to the particle sticking sub-model. The paper contains estimations of both the impaction and sticking efficiencies.
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