射流角度对三角形螺旋夹套传热性能的影响  

Effect of jet angle on heat transfer performance of triangular spiral jacket

作　　者：张伟[1] 王宗勇[1] 王超[1] 韩旭[1] 刘磊 ZHANG Wei;WANG Zongyong;WANG Chao;HAN Xu;LIU Lei(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110000,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110000

出　　处：《石油化工》2023年第1期49-55,共7页Petrochemical Technology

基　　金：辽宁省教育厅基础研究项目(LJ2020014)。

摘　　要：采用CFD软件中的Fluent模型对三角形螺旋夹套传热性能进行了数值模拟,分析了不同Re下的平均努塞尔数(Nu_(m))、轴向截面努塞尔数(Nu_(a))、径向局部努塞尔数(Nu_(c))、平均阻力系数(f)以及传热强化因子(PEC)随射流角度(α)的变化关系,得到了Nu_(m)和f与Re和α的拟合关联式。模拟结果表明,在所研究的Re范围内,Nu_(m)和f均随着α的增大而增大;在射流入射点附近相对螺旋角处于0.543~0.700范围内Nu_(a)增大明显,最大Nu_(a)相比Nu_(m)提升了30%;Nu_(c)沿竖直壁面呈现两端及中心高的分布特点;PEC随着α的增大呈现先下降(α=30°~135°)后上升(α=135°~150°)的变化规律,α=30°~45°范围内PEC接近,且PEC最高。The heat transfer performance of triangular spiral jacket was simulated using the Fluent model of CFD software.The variations of average Nusselt number(Nu_(m)),axial section Nusselt number(Nu_(a)),radial local Nusselt number(Nu_(c)),average resistance coefficient(f) and heat transfer enhancement factor(PEC) with jet angle(α) at different Re were analyzed,and the fitting correlations of Nu_(m)and f with respect to Re and α were obtained.The simulation results show that in the range of Re studied,Nu_(m)and f increase with the increase of α.Nu_(a)increases significantly in the range of relative spiral angle 0.543-0.700 near the jet incident point,and the maximum Nu_(a)increases by 30%compared with Nu_(m).Nu_(c)presents the distribution characteristics of both ends and central heights along the vertical wall.With the increase of α,the PEC first decreased(α=30°-135°) and then increased(α=135°-150°),and is close within the range ofα=30°-45°,which is the highest value.

关 键 词：螺旋夹套 三角形截面 对流传热 射流 螺旋流 

分 类 号：TQ018[化学工程]