Abstract The numerical and experimental data of the helically coiled-twisted trilobal tube (HCTTT) heat exchanger are compared, the results present that, due to more intense secondary flow of the HCTTT caused by the superposition of overall twist and self-twist, region near the center of the HCTTT has higher turbulent kinetic energy, and the region near the wall of the HCTTT is with the better Field synergy Angle. Two evaluation criteria, Performance Evaluation Criteria (PEC) and Filed synergy number (Fc) are introduced to comprehensively evaluate comprehensive performance, the results present that the HCTTT performs better in the Hydrodynamic and thermal performance than that of the helically coiled elliptical tube (HCET), helically coiled plain tube (HCPT) and trilobal tube (HCTT). In addition, compared to the HCPT, the increment ratio on Nusselt number of HCTTT is more than 19%–31%, while the augmentation ratio of flow resistance is up to 24%–38%. The novel correlations proposed in the HCTTT heat exchanger are consistent with the simulation data.

中文翻译：

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螺旋盘绕三叶管换热器管侧水力和热力性能的试验和数值研究

摘要 对螺旋盘绕-扭曲三叶管（HCTTT）换热器的数值和实验数据进行了比较，结果表明，由于整体扭曲和自扭曲叠加导致的 HCTTT 二次流更加强烈，近HCTTT的中心具有较高的湍动能，靠近HCTTT壁的区域具有更好的场协同角。引入Performance Evaluation Criteria (PEC) 和Filed Synergy number (Fc) 两个评价标准对综合性能进行综合评价，结果表明HCTTT在水动力和热性能方面的表现优于螺旋盘绕椭圆管(HCET) , 螺旋盘管 (HCPT) 和三叶形管 (HCTT)。此外，与HCPT相比，HCTTT的努塞尔数增加率大于19%~31%，流阻增加率高达24%~38%。HCTTT 换热器中提出的新相关性与模拟数据一致。