Based on heat transfer analyses of trailing-edge cutback configuration, a novel turbulated cutback structure comprising a combination of pin-fins and cutback surface is proposed in this paper to enhance the film cooling effects of trailing-edge cutback cooling. Experimental investigations on the effects of the pin-fin cross-sectional geometry (round, elliptical, and teardrop-shaped) on the trailing-edge cooling performance at varying blowing ratios (M) ranging from 0.25 to 2.00 are conducted. Detailed data of the adiabatic film effectiveness η is obtained using pressure-sensitive paint experiments, and the heat transfer coefficient is acquired by transient thermochromic liquid-crystal measurements. Then, the overall cooling performance of the turbulated cutback structure is evaluated and compared using the net heat flux reduction (NHFR). The experimental results show that the addition of pin-fins has an adverse effect on the film coverage on the expanded cutback surface, but only in the case at low M. The η distributions in the far-downstream region have a slight effect for the cases with different pin-fins. At M = 0.50, the area-averaged η values in the cases with elliptical and teardrop-shaped pin-fins are closer to those in the baseline case. As M increased, there is a monotonic increase in the heat transfer coefficient in each of the three cases with pin-fins. The case with pin-fins exhibits a high heat transfer rate that is significantly higher than that of the smooth baseline case, especially 13.3–26.0% higher than the smooth case in the M range of 1.00 to 1.50. The pin-fin shape exerted no significant impact on the surface heat transfer level at low M values. The case with round pin-fins gradually shows advantages at large M, and there is no significant difference in the area-averaged heat transfer between the cases with elliptical and teardrop-shaped pin-fins. Compared with the primeval cutback trailing-edge, the NHFR of the cases with pin-fins can significantly improve as M increased. At low M values, no significant difference in NHFR was found between the three cases with pin-fins, that is; the effectiveness of changing the shape in enhancing the overall cooling performance of a trailing-edge cutback cooling structure with pin-fins is limited. The elliptical pin-fins, which are advantageous on the high η values, can be selected at low M values. While the case with the round pin-fins is applied at large M values due to high heat transfer enhancement.

基于后缘切缝结构的传热分析，本文提出了一种新型的湍流切边结构，该结构由销鳍和切边表面组成，以增强后缘切缝冷却的薄膜冷却效果。进行了实验研究，研究了翅片横截面几何形状（圆形，椭圆形和泪珠形）在0.25至2.00的不同吹塑比（M）下对后缘冷却性能的影响。绝热膜效率η的详细数据是使用压敏涂料实验获得的，而传热系数是通过瞬态热致变色液晶测量获得的。然后，使用净热通量减少量（NHFR）评估并比较了湍流切入结构的总体冷却性能。实验结果表明，针状鳍片的添加对膨胀的切开表面上的薄膜覆盖率有不利影响，但仅在低M的情况下。在远下游区域的η分布对这种情况有轻微影响有不同的鳍片 在中号 = 0.50时，椭圆形和泪珠状针状鳍的面积平均η值更接近基线情况。随着M的增加，在三种带有针翅的情况下，传热系数都单调增加。带翅片的情况显示出很高的传热率，比光滑的基线情况高得多，特别是在1.00至1.50的M范围内，比光滑的情况高13.3–26.0％。低M值时，针翅形状对表面传热水平没有显着影响。带有圆形针状鳍的情况逐渐显示出在大M时的优势，并且椭圆形和泪滴形针状鳍的情况之间的平均面积传热没有显着差异。与原始的缩减后缘相比，随着M的增加，带鳍片的情况的NHFR可以显着提高。在低M值下，在三种带针鳍的情况下，NHFR均无显着差异，即：改变形状以增强带有针状翅片的后缘切屑冷却结构的整体冷却性能的有效性受到限制。可以在低M值下选择对高η值有利的椭圆形鳍状鳍。由于具有较高的传热能力，因此将圆形销钉的情况应用于较大的M值。可以在低M值下选择对高η值有利的椭圆形鳍状鳍。由于具有较高的传热能力，因此将圆形销钉的情况应用于较大的M值。可以在低M值下选择对高η值有利的椭圆形鳍状鳍。由于具有较高的传热能力，因此将圆形销钉的情况应用于较大的M值。