塑料科技2026，Vol.54Issue(1)：159-165,7.DOI:10.15925/j.cnki.issn1005-3360.2026.01.030
射流间距对多股射流冲击夹套传热的影响
Effect of Jet Spacing on Heat Transfer of Multi-jet Impingement Jacket
摘要
Abstract
A multi-jet impingement jacket tailored for highly exothermic reactions was proposed to intensify heat transfer.Numerical simulations were employed to examine how the axial spacing between successive jet tubes(l)and the jet velocity(v)affected the jacket's thermal performance.The results show that compared with a conventional cylindrical jacket of the same size,the multi-jet impingement jacket markedly raises the area-averaged Nusselt number(Num)on the heat-transfer wall and cuts the pressure drop(Δp).The axial distribution of the local Nusselt number(Nua)exhibits a wavy pattern,with peaks and troughs coinciding with the impingement locations.Over the velocity range 1～4 m/s,varying l has a negligible effect on Δp,whereas v is the dominant factor,and Δp increases monotonically with v.A comprehensive analysis shows that,when the l is 7.5d,the jacket delivers the best wall-temperature uniformity(UNu)and the highest Num among all multi-jet impingement jackets.关键词
夹套/冲击射流/射流间距/强化传热Key words
Jacket/Impinging jet/Jet spacing/Enhanced heat transfer分类
能源科技引用本文复制引用
庄凯,曹桓,李秉润,蔡永华,王宗勇..射流间距对多股射流冲击夹套传热的影响[J].塑料科技,2026,54(1):159-165,7.基金项目
辽宁省教育厅基本科研面上项目(JYTMS20231487) （JYTMS20231487）
