导流板旋向对螺旋铜管换热器传热性能的影响

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (23) : 151-158.

论文

季家东1，倪旭旺1，张经纬1，李飞扬2，陈清华1

作者信息 +

Effects of rotating direction of spiral deflector on heat transfer performance of helical copper tube heat exchanger

JI Jiadong1,NI Xuwang1,ZHANG Jingwei1,LI Feiyang2,CHEN Qinghua1

Author information +

文章历史 +

摘要

为了获得具有更高综合传热性能的螺旋铜管(Helical Copper Tube, HCT)换热设备，基于两种导流方案的换热器：螺旋导流板(Spiral Deflector，SD)、HCT同旋向换热器(记为：SSD-HCT换热器)和SD、HCT反旋向换热器(记为：OSD-HCT换热器)，采用双向--流固耦合计算法，研究了SD旋向对HCT振动强化传热性能和换热器综合传热性能的影响。研究表明：对于SSD-HCT换热器，壳程流体纵掠HCT，场协同角接近90°，HCT传热性能不佳，壳程流体出口温度较低；对于OSD-HCT换热器，壳程流体横掠HCT，场协同角较小，HCT传热性能较佳，壳程流体出口温度较高。SD和HCT同旋向布置时，换热器内HCT的传热性能较差，但HCT振动强化传热的效果明显；SD和HCT反旋向布置时，换热器内HCT的传热性能较好，但HCT振动强化传热的效果不明显。此外，换热器的综合振动强化传热能力随流速的增加而降低，SSD-HCT换热器的综合振动强化传热能力较高。

Abstract

In order to obtain helical copper tube (HCT) heat exchanger with higher comprehensive heat transfer performance, two kinds of heat exchangers with different flow diversion schemes were proposed: SSD-HCT (the spiral deflector (SD) and HCT have the same spiral direction) heat exchanger and OSD-HCT (the SD and HCT have opposite spiral direction) heat exchanger. Based on the bidirectional fluid solid interaction calculation method, the effects of SD rotation direction on the vibration-enhanced heat transfer performance of HCT and the comprehensive heat transfer performance of heat exchanger were studied. The results show that for the SSD-HCT heat exchanger, the heat transfer performance of HCT is poor and the outlet temperature of shell side fluid is lower. This is because the shell side fluid sweeps the HCTs longitudinally, making the field synergy angle close to 90°. For the OSD-HCT heat exchanger, the heat transfer performance of HCT is better and the outlet temperature of shell side fluid is higher. This is because the shell side fluid sweeps the HCTs transversely, making the field synergy angle smaller. The vibration-enhanced heat transfer performance of HCTs is obvious when the SD and HCT are arranged in the same spiral direction, and the vibration-enhanced heat transfer performance of HCTs is not obvious when the SD and HCT are arranged in opposite spiral direction. In addition, the comprehensive vibration enhanced heat transfer capacity of the heat exchanger decreases with the increase of the flow rate. And also, the comprehensive vibration enhanced heat transfer capability of the SSD-HCT heat exchanger is higher than that of the OSD-HCT heat exchanger.

导出引用

季家东1，倪旭旺1，张经纬1，李飞扬2，陈清华1. 导流板旋向对螺旋铜管换热器传热性能的影响[J]. 振动与冲击, 2023, 42(23): 151-158

JI Jiadong1,NI Xuwang1,ZHANG Jingwei1,LI Feiyang2,CHEN Qinghua1. Effects of rotating direction of spiral deflector on heat transfer performance of helical copper tube heat exchanger[J]. Journal of Vibration and Shock, 2023, 42(23): 151-158

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