气固流化床流动-换热研究进展:表征与颗粒-内构件调控OA

Gas-solid fluidized-bed reactors are widely applied in petrochemical,coal chemical,biochemical and other industries.Characterizing their multiphase flow behaviors and heat-transfer laws is of vital importance for the design,performance optimization,and industrial scale-up of the reactors.The principal methods for charac-terizing multiphase flow and heat transfer in fluidized beds include experimental measurements,numerical simu-lations,and machine learning.This review summarizes the current research progress in the application of these methods to flow regime identification,parameter prediction,and process optimization in fluidized beds.The effects of particle properties and internals on multiphase flow and heat transfer are also systematically discussed,with particular emphasis on the mechanisms by which particle morphology and internals influence fluidized-bed performance.The review indicates that the synergistic coupling of mixed-particle systems with internals is an important strategy for simultaneously improving flow uniformity and heat-transfer efficiency in fluidized beds.However,several challenges remain,including the coordinated regulation of particle segregation and mixing with internals configuration,the mismatch of parameters at the gas-solid-internal interfaces,and the difficulty of achieving closure in multiscale mathematical models.In the future,multiscale mechanistic coupling and data-driven model development may enable the accurate and efficient characterization of flow behavior and heat trans-fer characteristics in fluidized beds,thereby providing new strategies for their precise design and optimized oper-ation.