王斯民,孙利娟,宋晨,肖娟,张早校,文键

• 1:西安交通大学化学工程与技术学院
• 2:西安交通大学能源与动力工程学院

摘要(Abstract)：

为了增强缠绕管式换热器的综合性能,在圆形光滑传热管外开了沿管中心线方向的半圆形凹槽。基于计算流体动力学(CFD)数值模拟分析,研究这种基于开槽强化管的缠绕管换热器壳侧空气流动、换热及综合性能随凹槽数量和凹槽深度的变化规律。结果表明:当壳侧入口流速一定时,对流换热系数和压降都随凹槽数量增加而增大,且增加趋势逐渐变缓。对流换热系数随凹槽深度的增大先增大后减少,存在峰值;压降随凹槽深度的增大先增大后维持基本不变,而换热器的综合性能评价指标(PEC),随凹槽数量的增加维持基本不变,但与圆形光管相比提高了约4.21%;随凹槽深度的增加,先增大后减小,在0.3 mm深度达到峰值,该值比圆形光管提高了约4.21%。

关键词(KeyWords)： 缠绕管式换热器;半圆形凹槽;凹槽数量;凹槽深度;传热强化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51676146);; 中央高校基本科研业务费专项资金(xjj2018202)

作者(Author): 王斯民,孙利娟,宋晨,肖娟,张早校,文键

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