超临界氮在螺旋管内的流动与传热研究  

Flow and Heat Transfer Characteristics of Supercritical Nitrogen in Helical Pipes

作　　者：夏春杰[1] 陈永东[1] 王严冬 宋嘉梁 吴晓红[1] XIA Chun - jie CHEN Yong - dong WANG Yan- dong SONG Jia - liang WU Xiao - hong(Hefei General Machinery Research Institute,Hefei 230031 ,China)

机构地区：[1]合肥通用机械研究院,安徽合肥230031

出　　处：《压力容器》2017年第10期27-31,7,共6页Pressure Vessel Technology

基　　金：安徽省自然基金青年科学基金(1708085QE122)

摘　　要：采用有限元分析软件对超临界氮在螺旋管内的流动与传热进行研究,探讨了螺旋半径R、螺距P、管径d等结构特性对流动传热的影响,并对各参数灵敏度做了量化分析。结果表明,螺旋管内离心力的存在很大程度上强化了传热;螺旋管结构特性的变化对流动传热影响较大,其中管径d影响最大,螺旋半径R、螺距P次之,分析结果为今后的研究提供参考。Finite element analysis software was used to optimize flow and heat transfer characteristics of supercritical nitrogen in helical pipes. The effects of structural parameters （R, P, d） on flow and heat transfer were investigated and the sensitivity of these parameters was studied. The results show that the centrifugal force greatly enhances heat transfer in helical pipes. The change of geometrical structure has a great effect on the flow and heat transfer. The d has the greatest impact and R, P is smaller. Which provide a reference for future research.

关 键 词：LNG气化器 螺旋管 超临界氮 数值模拟 

分 类 号：TH49[机械工程—机械制造及自动化] TQ051.5[化学工程]