内置多叶扭带的碳化硅换热管强化传热特性研究  

Study on Enhanced Heat Transfer Characteristics of the Silicon Carbide Heat Exchanger with Multi-blade Twisted Tapes

作　　者：李佳豪 虞斌[1] 江超 吕林 LI Jia-hao;YU Bin;JIANG Chao;LV Lin(School of Mechanical and Power Engineering,Nanjing Tech University)

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《化工机械》2024年第3期375-381,共7页Chemical Engineering & Machinery

摘　　要：为了研究碳化硅换热管的流动和传热特性,达到增强综合换热能力的目的。采用数值模拟方法对内置4种不同结构扭带的换热管进行分析,确定四叶扭带模型作为后续研究对象,对比了在4种自定义的节距和宽度两种结构参数下,不同入口风速工况的换热管的热力性能。结果表明:扭带宽度对换热管的换热能力相较于节距具有更显著的强化作用,四叶扭带节距为360 mm、宽度为45 mm时换热管的综合换热能力最强,为1.59,此时换热管的努塞尔数相较光管提升了244.37%。For purpose of investigating both flow and heat transfer characteristics of the silicon carbide heat transfer pipe and enhancing comprehensive heat transfer capacity,making use of numerical simulation method to analyze the heat transfer pipe with four different twisted tapes was implemented,and the four-blade twisted tape model was taken as the object of research to compare thermal performance of the heat transfer pipe which boasting of different inlet wind speeds and four self-defined pitches and two widths.The results show that,the width of the twisted tape has significant strengthening effect on the heat transfer capacity than the pitch.When the pitch of the four-blade twisted tape stays at 360 mm and the width is 45 mm,the comprehensive heat transfer capacity of the heat exchange tube becomes strongest(1.59).At this time,Nusselt number of the heat transfer tube is 244.37%higher than that of the tube.

关 键 词：换热器 碳化硅换热管 多叶扭带 强化换热 数值模拟 综合换热性能 

分 类 号：TQ051.5[化学工程]