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Numerical investigation of combustion and liquid feedstock in high velocity suspension flame spraying process

Gozali, E, Kamnis, S and Gu, S (2013) Numerical investigation of combustion and liquid feedstock in high velocity suspension flame spraying process Surface and Coatings Technology, 228 (15 Aug). pp. 176-186.

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Abstract

Over the last decade the interest in thick nano-structured layers has been increasingly growing. Several new applications, including nanostructured thermoelectric coatings, thermally sprayed photovoltaic systems and solid oxide fuel cells, require reduction of micro-cracking, resistance to thermal shock and/or controlled porosity. The high velocity suspension flame spray (HVSFS) is a promising method to prepare advanced materials from nano-sized particles with unique properties. However, compared to the conventional thermal spray, HVSFS is by far more complex and difficult to control because the liquid feedstock phase undergoes aerodynamic break up and vaporization. The effects of suspension droplet size, injection velocity and mass flow rate were parametrically studied and the results were compared for axial, transverse and external injection. The model consists of several sub-models that include pre-mixed combustion of propane-oxygen, non-premixed ethanol–oxygen combustion, modeling aerodynamic droplet break-up and evaporation, heat and mass transfer between liquid droplets and gas phase. Thereby, the models are giving a detailed description of the relevant set of parameters and suggest a set of optimum spray conditions serving as a fundamental reference to further develop the technology.

Item Type: Article
Authors :
AuthorsEmailORCID
Gozali, EUNSPECIFIEDUNSPECIFIED
Kamnis, SUNSPECIFIEDUNSPECIFIED
Gu, SUNSPECIFIEDUNSPECIFIED
Date : 19 April 2013
Funders : School of Engineering in Xi'an Jiaotong-Liverpool University
Identification Number : https://doi.org/10.1016/j.surfcoat.2013.04.026
Copyright Disclaimer : Copyright © 2016 Elsevier B.V. or its licensors or contributors.
Uncontrolled Keywords : Liquid feedstock, Nanomaterial, HVSFS, Thermal spray
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 10:59
Last Modified : 28 Mar 2017 10:59
URI: http://epubs.surrey.ac.uk/id/eprint/810536

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