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Experimental investigation and numerical simulation of heat transfer in quenching fluidised beds
journal contribution
posted on 2005-01-01, 00:00 authored by Weimin Gao, Lingxue KongLingxue Kong, Peter HodgsonPeter HodgsonFluidisation characteristics at different surfaces of a work-piece of complex geometry are conducted in a fluidised bed at various conditions including fluidising number, bed temperature and fluidising medium. The quenching of the work-piece is performed experimentally. In particular, the major frequency and energy of the pressure fluctuations are measured as a function of either fluidising velocity or heat transfer position and the results are used to develop a mathematic model. A computational model is developed to simulate gas dynamics and heat transfer between the fluidised bed and the work-piece surface, as well as simulating the temperature within the work-piece. The predicted cooling curves are in good agreement with the experimental results. Based on the simulation results, the flow characteristics of the gas and the temperature of the dense gas-solid phase near the work-piece surface are analysed to understand the heat transfer mechanism in the fluidised bed.
History
Journal
International journal of materials & product technologyVolume
24Issue
1-4Pagination
319 - 338Publisher
Inderscience PublishersLocation
Geneva, SwitzerlandISSN
0268-1900Language
engPublication classification
C1 Refereed article in a scholarly journalUsage metrics
Keywords
quenchingheat transfermodellingpressure fluctuationnumerical simulationheat treatmentfluidised bedsfluidisationworkpiece surfacesfluidising velocitygas dynamicscooling curveScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMaterials Sciencemodelfluidised bedPRESSURE-FLUCTUATIONSSYSTEMSMechanical Engineering
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