Adhesion of volcanic ash particles under controlled conditions and implications for their deposition in gas turbines
Accepted version
Peer-reviewed
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Repository DOI
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Authors
Taltavull, C
Dean, J
Clyne, TW
Abstract
jats:sec<jats:label />jats:pA particular (representative) type of ash has been used in this study, having a particle size range of ∼10–70 μm. Experimental particle adhesion rate data are considered in conjunction with CFD modeling of particle velocities and temperatures. This ash becomes soft above ∼700 °C and it has been confirmed that a sharp increase is observed in the likelihood of adhesion as particle temperatures move into this range. Particle size is important and those in the approximate range 10–30 μm are most likely to adhere. This corresponds fairly closely with the size range that is most likely to enter a combustion chamber and turbine.</jats:p></jats:sec>
Description
Keywords
gas turbines, volcanic ash, deposition, modelling
Journal Title
Advanced Engineering Materials
Conference Name
Journal ISSN
1438-1656
1527-2648
1527-2648
Volume Title
18
Publisher
Wiley
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/K027530/1)
This work forms part of a research programme funded by EPSRC (EP/K027530/1). In conjunction with this project, a consortium of partners has been set up under the PROVIDA ("PROtection against Volcanic ash Induced Damage in Aeroengines") banner and information about its operation is available at http://www.ccg.msm.cam.ac.uk/initiatives/provida. The invaluable assistance of Kevin Roberts (Materials Department in Cambridge) with operation of the plasma spray facility is gratefully acknowledged. The authors are also grateful to Dr. Margaret Hartley, of the University of Manchester, for kindly collecting the Laki ash (and several other types) during field trips to Iceland, which were funded by EasyJet.