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Adhesion of Volcanic Ash Particles under Controlled Conditions and Implications for Their Deposition in Gas Turbines
Author(s) -
Taltavull Catalina,
Dean James,
Clyne Trevor William
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500371
Subject(s) - adhesion , range (aeronautics) , particle (ecology) , materials science , particle size , deposition (geology) , volcanic ash , combustion , volcano , mechanics , gas turbines , mineralogy , composite material , chemical engineering , geology , mechanical engineering , chemistry , physics , geomorphology , geochemistry , oceanography , sediment , engineering , organic chemistry
A 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.