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dc.contributor.authorNagalingam, Arun Prasanthen_US
dc.contributor.authorSanthanam, Vijayen_US
dc.contributor.authorDachepally, Nithin Kumar Guptaen_US
dc.contributor.authorYeo, Swee Hocken_US
dc.identifier.citationNagalingam, A. P., Santhanam, V., Dachepally, N. K. G. & Yeo, S. H. (2021). Multiphase hydrodynamic flow characterization for surface finishing the laser powder bed fused AlSi10Mg conformal cooling channels. Journal of Manufacturing Processes, 68(Part A), 277-292.
dc.description.abstractSurface finishing additive manufactured internal passages using dynamic cavitation-assisted microparticle flow is becoming popular. The nucleation, growth, and collapse of the cavitation inside complex passages are crucial contributors for surface finishing and call for understanding for process improvement. In this work, we aimed to surface finish linear Direct Metal Laser Sintered (DMLS) AlSi10Mg conformal cooling channels (CCC). First, we surface finished the cooling channels with a square cross-section of width varying from 5 mm to 1 mm and length extending up to 50 mm using various multiphase finishing modes. Second, we characterized the multiphase flow with a high-speed camera and underwater hydrophone measurements, focusing on the cavitation effects, inside the cooling channels. Third, we performed numerical simulations and extracted cavitation and turbulent kinetic energy distributions inside the channels. The surface texture results were supported by cavitation frequency (nfo), root mean square pressure (Prms), and acoustic energy (EA) observations from the hydrophone. Finally, we explained the surface finishing trend by varying the channel size and length using numerical simulation results. The results suggest that the cavitation phase distribution decrease with a decrease in channel size and an increase in the channel length. The method proposed is useful in establishing appropriate process parameters to achieve a uniform surface finish along the entire channel length.en_US
dc.relation.ispartofJournal of Manufacturing Processesen_US
dc.rights© 2021 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.en_US
dc.titleMultiphase hydrodynamic flow characterization for surface finishing the laser powder bed fused AlSi10Mg conformal cooling channelsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.researchRolls-Royce@NTU Corporate Laben_US
dc.identifier.issuePart Aen_US
dc.subject.keywordsPowder Bed Fusionen_US
dc.subject.keywordsCooling Channelen_US
dc.subject.keywordsSurface Finishingen_US
dc.subject.keywordsAcoustic Cavitationen_US
dc.subject.keywordsMultiphase Flowen_US
dc.description.acknowledgementThis work was performed within the Rolls-Royce@NTU Corporate Lab, a joint university technology centre between Nanyang Technological University and Rolls-Royce with support from the National Research Foundation (NRF) of Singapore. The authors would like to thank the Manufacturing Technologies team at Rolls-Royce@NTU corporate lab, Singapore and Dr.-Ing Thomas Haubold (Rolls-Royce, Germmany) for their contributions.en_US
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