Abstract In this paper, an industrial-scale experiment with ten testing heat exchangers is conducted to study the influences of structures and working conditions on the tube-side heat transfer and flow characteristics of spiral-wound heat exchangers. The experimental results show that, with the increase of the winding angle, the tube-side heat transfer coefficients increase because of the enhanced secondary flow and slightly larger velocity. The compactness of the whole heat exchanger changes with the variations of the layer and tube pitch. When layer pitch and tube pitch decrease, the flow channel in the shell side is narrowed down, which makes the overall heat transfer temperature difference decrease and finally results in deterioration of the heat transfer in the tube side. For the friction factors, they decrease when the winding angle decreases due to the different turbulence status and velocities in the tube. As a parameter of working condition, the tube-side inlet temperature has a slightly negative effect on the heat transfer. Based on the experimental data, the correlations of Nusselt number and friction factor are developed. Comparing the experimental data and the correlations, the average errors of the Nusselt number and friction factor are 8.04% and 6.28%, respectively.

中文翻译：

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螺旋缠绕式换热器管侧热工水力性能试验研究

摘要 为了研究结构和工况对螺旋缠绕式换热器管侧传热和流动特性的影响，进行了10台试验换热器的工业规模试验。实验结果表明，随着缠绕角的增加，由于二次流增强和速度稍大，管侧传热系数增加。整个换热器的紧密度随着层数和管距的变化而变化。当层距和管距减小时，壳侧流道变窄，使整体传热温差减小，最终导致管侧传热变差。对于摩擦系数，由于管中不同的湍流状态和速度，当缠绕角减小时，它们会减小。作为工况参数，管侧入口温度对传热有轻微的负面影响。根据实验数据，建立了努塞尔数和摩擦系数的相关性。比较实验数据和相关性，努塞尔数和摩擦系数的平均误差分别为 8.04% 和 6.28%。