Show simple item record  

dc.contributor.advisorGabbitas, Brian
dc.contributor.authorSingh, Tejinder
dc.date.accessioned2011-02-02T02:21:57Z
dc.date.available2011-02-02T02:21:57Z
dc.date.issued2010
dc.identifier.citationSingh, T. (2010). Investigation of Flow Parameters for Titanium Cold Spraying using CFD Simulation (Thesis, Master of Engineering (ME)). University of Waikato, Hamilton, New Zealand. Retrieved from https://hdl.handle.net/10289/5002en
dc.identifier.urihttps://hdl.handle.net/10289/5002
dc.description.abstractA comprehensive study of cold gas dynamic spray technology is required for optimising performance and gun design for spraying various materials. Cold spraying technology is a new technique in industry and very limited data is available. This thesis focuses on the investigation of cold spray parameters for spraying ductile titanium alloys through a de-Laval convergent-divergent nozzle and optimisation of the nozzle dimensions. This work describes a detailed study of the various parameters, namely applied gas pressure, gas temperature, size of titanium particles and dimensions of the nozzle on the outlet velocity of the titanium particles. A model of a two-dimensional axisymmetric nozzle was used to generate the flow field of titanium particles with the help of a gas stream flowing at supersonic speed. ANSYS FLUENT software was used for the simulation of a cold spray nozzle. A standard k-ɛ model has been used to account for the turbulence produced due to the very high velocity flow. Differences in the velocity of titanium particles were modelled over the range of applied gas pressure, gas temperature and size of titanium particles. From the CFD simulation results optimum values of gas pressure and temperature were found for making a successful coating of titanium particles. The optimum nozzle dimensions were also found as the diverging length and exit diameter of the nozzle were found to affect the outlet velocity of titanium particles. The simulation results show good agreement with previous cold spray work using different spraying materials. Validation of the CFD model was done by referring to the experimental work and CFD work done for a similar kind of flow field. The grid quality of the model was investigated to get the results to converge and be independent of the grid size to give good agreement between the accuracy of results and the computational time.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Waikato
dc.rightsAll items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectCold Spraying
dc.titleInvestigation of Flow Parameters for Titanium Cold Spraying using CFD Simulationen
dc.typeThesis
thesis.degree.grantorUniversity of Waikato
thesis.degree.levelMasters
thesis.degree.nameMaster of Engineering (ME)en_NZ
dc.date.updated2010-08-06T02:38:47Z
pubs.place-of-publicationHamilton, New Zealanden_NZ


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record