摘要
Abstract
The research progress of jet impingement heat transfer is reviewed with focus on its flow and heat transfer mechanism.The influences of key parameters including nozzle shape,jet height ratio,relative nozzle spacing,Reynolds number and jet incidence angle are analyzed.The application status of jet-flow heat exchangers in electronic device cooling,concentrated photovoltaic system heat dissipation and industrial heat exchange scenarios is summarized,and the cur-rent research bottlenecks as well as future development directions are identified.Jet impingement heat transfer continuously renews the thermal boundary layer by impacting wall surfaces with high-speed jets and rein-forcing turbulent mixing,thereby significantly improv-ing heat transfer performance.Nozzle shape,jet height ratio,relative nozzle spacing and Reynolds number are the core parameters dominating jet heat transfer perfor-mance.Widely applied in electronic devices,concen-trated photovoltaic systems,micro-jet heat exchangers,industrial waste heat recovery and other fields,jet impingement heat transfer technology presents promi-nent advantages of high efficiency and compact struc-ture in practical engineering.Nevertheless,the engi-neering application of jet-flow heat exchangers still faces multiple challenges such as increased pressure drop,nozzle blockage,uneven flow distribution and poor long-term operational reliability.Further investi-gations are required on heat transfer mechanisms,jet flow laws and engineering design methods under com-plex working conditions.关键词
喷流冲击/换热强化/喷流式换热器Key words
jet impingement/reinforced heat transfer/jet-flow heat exchanger分类
能源科技
