每年出版 12 期
ISSN 打印: 1044-5110
ISSN 在线: 1936-2684
Indexed in
SPRAY STRUCTURE ANALYSIS IN ATOMIZATION PROCESSES IN ENCLOSURES FOR POWDER PRODUCTION
摘要
The production of powders and solids (in the micrometer to millimeter size range) with controlled morphology may be achieved in spray processes from solutions, melts, suspensions, or emulsions. The droplet-to-particle state change takes place in the dispersed spray situation by solidification or by drying and mass and heat transfer processes. The spray behavior is influenced by the interaction of the droplet spray flow and the gas flow in the surrounding vessel or chamber. The spray chamber design has a significant influence on the local flow structures as recirculation and re-entrainment of spray droplets. Flow structures induced by different spray chamber geometries also affect the local concentration of droplets. In this contribution, the influence of different spray chamber designs on unsteady flow structures in a spray is discussed. Since the powder and product properties of a spray process highly depend on the local mass and heat transfer within the spray, droplet trajectories as well as local droplet concentrations have to be assessed. Both phenomena are reviewed experimentally using particle imaging methods in planar light sheets of the spray. The effect of coherent flow structures on the local droplet concentration is the central point of this investigation.
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Lampa A., Fritsching U., Large Eddy Simulation of the spray formation in confinements, International Journal of Heat and Fluid Flow, 43, 2013. Crossref
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Quintanilla-Carvajal María Ximena, Hernández-Sánchez Humberto, Alamilla-Beltrán Liliana, Zepeda-Vallejo Gerardo, Jaramillo-Flores María Eugenia, de Jesús Perea-Flores María, Jimenez-Aparicio Antonio, Gutiérrez-López Gustavo F., Effects of microfluidisation process on the amounts and distribution of encapsulated and non-encapsulated α-tocopherol microcapsules obtained by spray drying, Food Research International, 63, 2014. Crossref
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Günther Astrid, Lampa Aljoscha, Fritsching Udo, Schröder Jewe, Kleinhans Agnes, Gaukel Volker, Schuchmann Heike P., Loth Jan-Martin, Petermann Marcus, Wirth Karl-Ernst, Benchmarking of Gas-Assisted Atomization Systems for Liquid Disintegration, Chemical Engineering & Technology, 39, 4, 2016. Crossref
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Li Xing-gang, Fritsching Udo, Spray Transport Fundamentals, in Metal Sprays and Spray Deposition, 2017. Crossref
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Lampa Aljoscha, Fritsching Udo, Hot Gas Atomization of Complex Liquids for Powder Production, in Process-Spray, 2016. Crossref
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Beckers D., Ellendt N., Fritsching U., Uhlenwinkel V., Impact of process flow conditions on particle morphology in metal powder production via gas atomization, Advanced Powder Technology, 31, 1, 2020. Crossref
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Xiao Fei, Yang Rongjie, Liu Zhenhui, Active aluminum composites and their hydrogen generation via hydrolysis reaction: A review, International Journal of Hydrogen Energy, 47, 1, 2022. Crossref