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| Abstract No.: |
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| Title: |
Modeling a HVOF coating process by using fluid structure interactions (FSI) approach
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| Authors: |
Esther Dongmo* / Universität Stuttgart, Institut für Fertigungstechnologie keramischer Bauteile, IFKB / Institute for Manufacturing Technologies of Ceramic Components and Composites, Germany
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| Abstract: |
The expected properties and residual stress distribution of coating and substrate materials can considerably be affected due to the high kinetic and thermal energy of the spray flame and the impinging particles. The aim of this study is to analyze the influence of thermal load on the temperature distribution of coated surface by using a coupled of a true 3-D computational Fluid Dynamic (CFD) and a finite element model (FEM). It has been seen significant improvements in this new numerical modal approach called fluid structure interactions (FSI) in recent years. The combustion process, gas expansion, powder injection and momentum and heat transfer between gas and in-flight particles (multi-component turbulent flow with combustion) are modelled by CFD. Resulting thermo physical properties are used to simulate the unsteady heat transfer in the finite element model of the substrate by means of the fluid-structure interactions technique. For the validation of the models, experimental measurements with the online diagnose system SprayWatch® and the infrared thermo cameras were performed. A symmetrically coupled formulation of the HVOF spraying process (CFD) and the thermal analysis model (FEM) by using FSI approach (ANSYS code) were presented.
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