Experimental investigation and numerical simulation of heat transfer in quenching fluidised beds

Gao, Weimin, Kong, Lingxue and Hodgson, Peter 2005, Experimental investigation and numerical simulation of heat transfer in quenching fluidised beds, International journal of materials & product technology, vol. 24, no. 1-4, pp. 319-338.

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Title Experimental investigation and numerical simulation of heat transfer in quenching fluidised beds
Author(s) Gao, WeiminORCID iD for Gao, Weimin orcid.org/0000-0002-7390-169X
Kong, LingxueORCID iD for Kong, Lingxue orcid.org/0000-0001-6219-3897
Hodgson, Peter
Journal name International journal of materials & product technology
Volume number 24
Issue number 1-4
Start page 319
End page 338
Publisher Inderscience Publishers
Place of publication Geneva, Switzerland
Publication date 2005
ISSN 0268-1900
Keyword(s) quenching
heat transfer
pressure fluctuation
numerical simulation
heat treatment
fluidised beds
workpiece surfaces
fluidising velocity
gas dynamics
cooling curve
Summary 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.
Language eng
Field of Research 091505 Heat and Mass Transfer Operations
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30003287

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