An innovative array of pin-fins with spiral wings was proposed as a new heat transfer augmentation device. The aerothermal characteristics were correlatively analyzed based on the Nusselt number measurements and the concomitant augmentations in friction factors and the turbulent flow field simulated by the commercial code at the Reynolds numbers of 5500, 7500, 10,000, 15,000, and 20,000. The pair of spiral wings on each cylindrical pin between two neighboring pins in a pin-row swirled the flows to promote the core-to-wall fluid mixings. The endwall average Nusselt numbers and fiction factors were raised to 5.4–5.03 and 107.6–114.93 times of the plain tube references when 5500 ≤ Re ≤ 20,000. Compared with the ducted flows with the various pin fin geometries, the array of pins with the spiral wings achieved the higher degree of heat transfer elevations with the noticeable pressure drop augmentations. The empirical correlations that calculated the endwall-average Nusselt number and Fanning friction factor of the channel with the spirally finned pin array were generated.

提出了一种具有螺旋翼的创新针翅阵列作为一种新的传热增强装置。基于努塞尔数测量和伴随的摩擦系数增加以及商业代码在雷诺数为 5500、7500、10,000、15,000 和 20,000 时模拟的湍流场，对空气热特性进行了相关分析。针排中两个相邻针之间的每个圆柱形针上的一对螺旋翼使流体产生涡流，以促进芯壁流体混合。当 5500 ≤ Re时，端壁平均 Nusselt 数和摩擦系数提高到普通管参考的 5.4-5.03 和 107.6-114.93 倍 ≤ 20,000。与具有各种针翅几何形状的管道流动相比，具有螺旋翼的针阵列实现了更高程度的传热高度，同时显着增加了压降。产生了计算端壁平均努塞尔数和具有螺旋翅片销阵列的通道的范宁摩擦系数的经验相关性。