A Computational and Experimental Investigation into Radial Injection for Suspension High Velocity Oxy-Fuel (SHVOF) Thermal Spray

Chadha, S.; Chadha, Sunil; Jefferson-Loveday, R.; Venturi, F.; Hussain, T.

Abstract

Suspension high velocity oxy-fuel thermal spray typically utilizes axial injections of suspension into the combustion chamber. There are certain cases where the oxygen-sensitive nanoparticles benefit from a reduction in the time and temperature spent in the gas flow. Therefore, a radial injection outside of the nozzle can enable deposition of oxygen-sensitive nanomaterials. This study investigated the effect of the suspension flow rate, angle of injection and the injector diameter on the in-flight particle conditions. The combustion reaction is modeled using the eddy dissipation concept model with a robust reaction mechanism and compared to the current approach within the literature. This approach has not been employed within SHVOF thermal spray and provides a robust treatment of the reaction mechanisms. The suspension was modeled using a two-way coupled discrete particle model. Experimental observations were obtained using high-speed imaging, and observations of the liquid jet were compared to the numerical values.

Citation

Chadha, S., Chadha, S., Jefferson-Loveday, R., Venturi, F., & Hussain, T. (2019). A Computational and Experimental Investigation into Radial Injection for Suspension High Velocity Oxy-Fuel (SHVOF) Thermal Spray. Journal of Thermal Spray Technology, 28(6), 1126-1145. https://doi.org/10.1007/s11666-019-00888-8

• Journal Article Type: Article
• Acceptance Date: Jun 25, 2019
• Online Publication Date: Jul 15, 2019
• Publication Date: Aug 1, 2019
• Deposit Date: Jul 15, 2019
• Publicly Available Date: Jul 18, 2019
• Journal: Journal of Thermal Spray Technology
• Print ISSN: 1059-9630
• Electronic ISSN: 1544-1016
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 28
• Issue: 6
• Pages: 1126-1145
• DOI: https://doi.org/10.1007/s11666-019-00888-8
• Keywords: Suspension thermal spray; SHVOF; HVSFS; Radial Injection; Combustion Modelling; Supersonic Crossflow; High Speed Imaging; 2
• Public URL: https://nottingham-repository.worktribe.com/output/2309620
• Publisher URL: https://link.springer.com/article/10.1007/s11666-019-00888-8