In this paper, the experimental effect of the continuous and discontinuous twisted tapes turbulator (perforated and non-perforated) on the inner side of the internal tube in the double heat exchangers on heat transfer, the friction coefficient, and thermal performance have been discussed. On discontinuous twisted tapes turbulator, 9 holes with different geometries, such as triangular, square, rectangular, circular, and diamond with the triangular arrangement, have been created on turbulator flat surfaces. The Reynolds range is investigated at 5500–10000, and working fluids are on the side of the inner tube and annular space is hot and cold water, respectively. Experimental results have shown that discontinuous turbulator has a better effect on heat transfer and pressure drop than continuous turbulator. As the discontinuous turbulator without a hole has an increase in heat transfer of 8.2 % and a reduction of 9.8 % in the pressure drop coefficient compared to the continuous turbulator. Then the effect of perforation on discontinuous twisted tapes turbulator was investigated. Experimental results show that perforated discontinuous turbulator with circular, square, rectangular, diamond and triangular perforation with the same hydraulic diameter as for discontinuous turbulator without perforation was 20.8 %, 15 %, 11 %, 8.7 %, 5 % increase in heat transfer and 27.7 %, 22.8 %, 17.3 %, 12.1 %, 5.5 % decrease in the coefficient of pressure drop, respectively. Therefore, according to the results, the best thermal performance was related to the perforated of perforated discontinuous twisted turbulator, discontinuous twisted turbulator, and continuously twisted turbulator were respectively.

在本文中，讨论了在双热交换器内管内侧连续和不连续的扭曲带湍流器（穿孔和非穿孔）对传热，摩擦系数和热性能的影响。在不连续的扭曲带式扰流器上，已在扰动器平面上创建了9个不同几何形状的孔，例如三角形，正方形，矩形，圆形和菱形的三角形排列。雷诺范围在5500–10000范围内进行了研究，工作流体位于内管一侧，环形空间分别是热水和冷水。实验结果表明，不连续湍流器比连续湍流器对传热和压降的影响更好。与连续湍流器相比，由于不带孔的不连续湍流器的传热增加了8.2％，压降系数降低了9.8％。然后研究了穿孔对不连续扭曲带湍流器的影响。实验结果表明，具有圆形，方形，矩形，菱形和三角形穿孔的穿孔不连续扰动器的水力直径与不带有穿孔的不连续扰动器的水力直径分别为20.8％，15％，11％，8.7％，5％，热传递和27.7％压降系数分别降低了5％，22.8％，17.3％，12.1％和5.5％。因此，根据结果，最佳热性能与穿孔不连续扭曲湍流器，不连续扭曲湍流器的穿孔，