In this experimental study, we aimed to determine the combined effect of circular and semicircular cuts on twisted tape inserts in a double pipe heat exchanger operating in a turbulent regime with a Reynolds number ranging from 4000 to 18000. The insert used had circular cuts on the neutral axis and semicircular cuts on the edges. The diameter of the cuts was varied between 4 mm, 6 mm, and 8 mm for twisted tapes with twist ratios (x/b) of 4.5, 5.5, and 6.5. To reduce errors and increase automation, we employed the internet of things approach to measure additional input and output parameters, as well as cold and hot flow rates. This approach yielded more reliable results by minimizing human intervention. The findings of the present study indicate that the definite modifications in twisted tape led to a significant improvement in thermohydraulic performance metrics. Compared to other types of cuts, the circular and semicircular cut twisted tapes with x/b = 4.5 and φ = 8 mm achieved the most competitive enhancement in thermohydraulic properties.

在这项实验研究中，我们的目的是确定在雷诺数范围为 4000 至 18000 的湍流状态下运行的双管换热器中，圆形和半圆形切口对扭带嵌件的综合影响。所使用的嵌件在中性轴和边缘上的半圆形切口。对于捻度比 (x/b) 为 4.5、5.5 和 6.5 的捻带，切口直径在 4 mm、6 mm 和 8 mm 之间变化。为了减少错误并提高自动化程度，我们采用物联网方法来测量额外的输入和输出参数以及冷热流量。这种方法通过最大限度地减少人为干预产生了更可靠的结果。本研究的结果表明，扭带的明确修改导致热水力性能指标的显着改善。与其他类型的切割相比，x/b = 4.5 和 φ = 8 mm 的圆形和半圆形切割扭带在热工水力性能方面实现了最具竞争力的增强。