This study gives the combined outcome of twisted tapes (TT) and perforated twisted tapes (PTT) with twist ratios of (TRS) 3, 4 and 5 and wire coils (WC) coil ratios (CR) of 3 and 4 in a circular tube, where water has been circulated as the working fluid. The convective heat transfer coefficient (h) and friction factor (f) characteristics are examined in the turbulent flow regime (3000 ≤ Re ≤ 16,000) in order to obtain the thermal performance. These characteristics obtained with the combined effect of TT and PTT associated with WC in a plain tube are 65.06%–101.13%, 75.67%–177.81% and 2.75%–30%, 9%–28% respectively when compared with the circular tube. These enhancements are due to reversed flow caused by wire coils with swirling and impinging flow from the twisted tapes. In addition, high turbulence is created while the fluid is passing through the perforations of PTT. With the wire coil at TR = 3 and CR = 3, the maximum thermal enhancement factor at stable pumping power is 2.03 and 2.66 for TT and PTT, respectively. For all wire coils, twisted tapes and plain tubes, the correlations of Nusselt number and friction factor are established.

这项研究给出了圆管中的扭曲比（TRS）3、4和5以及扭曲比（CR）分别为3和4的双绞带（TT）和穿孔双绞带（PTT）的组合结果，其中水已作为工作流体循环。对流热传递系数（h）和摩擦系数（f）的特性被检查在湍流状态（3000≤ 再 ≤16,000）以获得热性能。与圆形管相比，在普通管中，由TT和PTT与WC共同作用获得的这些特性分别为65.06％–101.13％，75.67％–177.81％和2.75％–30％，9％–28％。这些增强归因于由螺旋线圈引起的反向流动，其中螺旋带产生涡流和冲击流。另外，当流体通过PTT穿孔时会产生高湍流。在TR = 3和CR = 3的情况下，TT和PTT在稳定泵浦功率下的最大热增强因子分别为2.03和2.66。对于所有的线圈，双绞线和普通管，建立了努塞尔数与摩擦系数的相关性。