摘要
针对一种由六头螺旋槽纹管和光管组合而成的新型螺旋复合型槽纹管,在10 000≤Re≤30 000的范围内,观察螺纹部分长度分别为0.1、0.2、0.3m时对壳程流体的流动和传热产生的影响。基于得到验证的数值模拟方法,研究不同Re下流体在壳程的流动情况,通过分析二次流的产生与消失过程,发现流体在壳程中流动的规律与螺纹部分长度无关。随着Re的增长,二次流变得更加剧烈,能有效强化传热,而螺旋复合型槽纹管引起的阻力损失也随之增大。
Aiming at a novel hybrid tube consisting of smooth tube and six-head spirally corrugated tube in the range of 10 000≤Re≤30 000, the influences on shell-side flow and heat transfer performance were investigated when the lengths of corrugation part are 0.1 m, 0.2 m and 0.3 m respectively;and basing on the reliable numerical simulation method, the fluid flow in the shell side under different Re was investigated. Analyzing the secondary flow generation and its gradual disappearance indicates that, the fluid flow in the shell side has no relation to the length of the threaded portion. With the increase of Re, the secondary flow becomes more intense and it can effectively enhance heat transfer, and the resistance loss caused by spiral composite grooved pipe also increases.
作者
杨晨
陈珉芮
钱锦远
洪伟荣
金志江
YANG Chen;CHEN Min-rui;QIAN Jin-yuan;HONG Wei-rong;JIN Zhi-jiang(Institute of Process Equipment in School of Energy Engineering, Zhejiang University)
出处
《化工机械》
CAS
2019年第2期146-151,共6页
Chemical Engineering & Machinery
基金
国家自然科学基金项目(51805470)
中央高校基本科研业务经费项目(2018QNA4013)
关键词
螺旋复合型槽纹管
六头螺旋槽纹管
光管
强化传热
二次流
传热特性
hybrid smooth and spirally-corrugated tube
six-head spiral grooved pipe
smooth pipe
enhanced heat transfer
secondary flow
heat-transfer characteristic
