The teardrop pattern observed to be more efficient in straight tubes was examined for the first time in a twisted tape wall. The thermo-hydraulic performances of twisted tapes having periodically teardrop-shaped dimple-protrusion patterned walls are numerically investigated. The new designs have two different densities (N=30, and 45), three alternative types of layouts (composed of only protrusions, only dimples, and a combination of dimples and protrusions) align in two different flow directions. Designs have a constant twist ratio (TR) of 3, and calculations are conducted for Reynolds numbers (Re) between 3000 and 27000 by Ansys Fluent under a constant heat flux of 50000 W/m². All cases have higher Nusselt number (Nu) values than traditional twisted tape (TT) in the tested Re region. Besides, all arrangements except the teardrop protruded twisted tape have higher thermal performance factors than the TT in the Re range from 3000 to 5500. All dense versions of the teardrop patterned twisted tapes have higher Nu and friction factor (f) than sparse versions of them. The dense teardrop dimpled-protruded (D-TDP) case reaches TPF of 1.517, the highest value among the tested twisted tapes, at Re = 3000.

观察到的泪滴图案在直管中更有效，这是第一次在扭曲的胶带壁中进行检查。数值研究了具有周期性泪滴状凹坑突起图案壁的扭曲带的热工水力性能。新设计具有两种不同的密度（N=30 和 45），三种替代类型的布局（仅由突起、仅由凹坑组成，以及凹坑和突起的组合）在两个不同的流动方向上对齐。设计的恒定扭曲比 (TR) 为 3，并且在 50000 W/m ²的恒定热通量下，Ansys Fluent 针对 3000 到 27000 之间的雷诺数 ( Re )进行了计算。所有案例都有更高的努塞尔数（Nu) 值高于测试Re区域中的传统双绞带 (TT) 。此外，除了泪滴所有安排突出扭转的磁带有更高的导热性能的因素比在所述TT再范围从3000到5500的泪滴所有密版本的图案化的扭曲带具有较高的女和摩擦系数（˚F）比他们的稀疏版本. 密集泪珠凹痕突出 (D-TDP) 表壳在Re  = 3000 时达到 1.517 的 TPF，这是测试的双绞带中的最高值。