Experimental investigation and numerical simulation of heat transfer in quenching fluidised beds
Data(s) |
01/01/2005
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Resumo |
Fluidisation 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. <br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Inderscience Publishers |
Relação |
http://dro.deakin.edu.au/eserv/DU:30003287/n20051263.pdf |
Palavras-Chave | #quenching #heat transfer #modelling #pressure fluctuation #numerical simulation #heat treatment #fluidised beds #fluidisation #workpiece surfaces #fluidising velocity #gas dynamics #cooling curve |
Tipo |
Journal Article |