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| Abstract No.: |
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Scheduled at:
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Wednesday, September 28, 2011, Saal C2.1 2:50 PM
Modeling & Simulation 2
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| Title: |
Modeling ceramic droplet impingement
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| Authors: |
Hani Tabbara* / Energy Technology Research Group, School of Engineering Sciences, University of Southampton , UK
Sai Gu/ University of Southampton, United Kingdom
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| Abstract: |
Zirconia is especially useful in its application as a thermal barrier coating for jet and diesel engines. Due to the low thermal conductivity of zirconia large temperature gradients through the powder particles are experienced during plasma spray deposition. As a result the particles often impinge at the substrate in a semi-molten form, which in turn substantially affects the final performance characteristics of the coating being formed. This investigation is particularly dedicated to the novel modelling development and simulation of semi-molten droplet impingement of plasma sprayed particles at the substrate surface. The study examines the impingement process during impact, spreading and solidification of semi-molten zirconia and adds to the growing insight being provided by numerical simulation on the topic of particle impingement. In particular the methods presented in this study can be applied to enhance our understanding of coatings which contain semi-molten droplets.
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