螺旋角对六分型螺旋折流板换热器换热性能的影响  

EFFECT OF HELICAL ANGLE ON PERFOR-MANCE OF SEXTANT HELICAL BAFFLE HEAT EXCHANGER

作　　者：张翔 赵承志 佀闻 胡志刚 栾德玉[1] Zhang Xiang;Zhao Chengzhi;Si Wen;Hu Zhigang;Luan Deyu(Qingdao University of Science and Technology,Qingdao,Shandong,266061;Qingdao Changlong Heavy Equipment Co.,Ltd.,Qingdao,Shandong,266061)

机构地区：[1]青岛科技大学,山东青岛266061 [2]青岛畅隆重型装备有限公司,山东青岛266000

出　　处：《石油化工设备技术》2024年第3期22-26,I0002,共6页Petrochemical Equipment Technology

基　　金：国家自然科学基金委(批准号:NO.52176040 E0602)资助的课题。

摘　　要：为探究螺旋角对六分型螺旋折流板换热器换热性能的影响,采用数值模拟的方法,以液态水为工作介质,对六分型螺旋折流板换热器在不同流量下的换热性能进行研究,分析螺旋角变化对于传热系数和换热综合性能的影响。结果表明:随着螺旋角的增大,换热管沿轴向的表面热流密度逐渐减小,壳程传热系数和压降也随之减小;换热综合性能指标h s/Δp和h s/Δp 1/3随螺旋角增大而增大,而在螺旋角β=25°的条件下,h s/Δp和h s/Δp 1/3显著下降。由此可知,选择较大螺旋角能够获得较好的换热性能。上述研究结果可为六分型螺旋折流板换热器的工程应用提供参考。In order to explore the effect of helix angle on the heat transfer performance of sextant helical baffle heat exchanger,numerical simulation is adopted to study the heat transfer performance of sextant helical baffle heat exchanger under different flow rates with liquid water as the working medium,and to analyze the effect of helix angle change on the heat transfer coefficient and the comprehensive performance of heat transfer.The results show that with the increase of the helix angle,the surface heat flux along the axial direction of the heat exchanger tube decreases,and the heat transfer coefficient and pressure drop at the shell side also decrease;the comprehensive heat transfer performance indexes h s/Δp and h s/Δp 1/3 increase with the increase of helix angle,while under the condition of helix angle b=25°,h s/Δp and h s/Δp 1/3 decreases significantly.Therefore,a larger helix angle can achieve better heat transfer performance.The research results can provide reference for the engineering application of the sextant helical baffleheat exchanger.

关 键 词：螺旋折流板换热器 螺旋角 数值模拟 传热 

分 类 号：TK172[动力工程及工程热物理—热能工程]