摘要
由于缠绕管特殊的结构形式,缠绕管内层流向湍流的转变雷诺数范围较大。对缠绕管管内流体单相流动多种流态状态进行数值模拟,数值计算结果与实验关联式进行比较。在缠绕管管内流动为层流状态下,采用laminar model数值计算缠绕管换热特性结果与实验关联式相比,误差小,模型适应性好。而管内流动雷诺数高于临界雷诺数,采用低雷诺数湍流模型SSTk-ω模型能够较好模拟计算管内传热特性,当管内流态逐渐向旺盛湍流转变,采用高雷诺数湍流模型realizable k-ε模型或RNG k-ε模型进行模拟计算Nu较为准确。
Due to the special structure of the coiled tube, the Reynolds number range of the transition from laminar to turbulent flow is large. Various flow states of fluid single-phase flow in the winding tube is numerically simulate and compared with the experimental correlations. When the flow in the winding tube is laminar, the results of heat transfer and pressure drop characteristic of the winding tube are calculated by using laminar model have small errors with the experimental correlation and good adaptability. When the Reynolds number is higher than the critical Reynolds number, the low Reynolds number SST k-ω turbulence model can well simulate the heat transfer characteristics inside coiled tube. When the flow pattern in the tube gradually changes to strong turbulence, it is more accurate to use the high Reynolds number turbulence model realizable k-ε or RNG k-ε model to simulate Nu.
作者
刘娇阳
张庆
晁龙
陶盼盼
张庆峰
卢文潭
马尚尚
Liu Jiaoyang;Zhang Qing;Chao Long;Tao Panpan;Zhang Qingfeng;Lu Wentan;Ma Shangshang(Suzhou University,School of Chemistry&Chemical Engineering,Suzhou 234000,China)
出处
《广东化工》
CAS
2020年第21期53-55,共3页
Guangdong Chemical Industry
基金
宿州学院大学生创新创业训练计划项目(201910379077)
宿州学院非财政资金科研项目(2020xhx063)
王红艳名师工作室(2016msgzs071)。
关键词
缠绕管
多流态
数值模拟
数值模型
coiled tube
multifluid state
numerical simulation
numerical model
