柱肋作为一种冷却通道内的强化换热技术，对提高层板结构的冷却效率有着重要意义。为了研究柱肋对双层板结构冷却性能和流场的影响，数值模拟研究了柱肋高径比分别为1，0.6，0.2，吹风比分别为0.3，0.6，1.0，15的原模型和等比例放大5倍模型两种尺度层板冷却结构的冷却效率。结果表明：高径比的变化对原模型冷却效率的影响更加明显，对放大模型的冷却效率影响非常小；吹风比越大，高径比对冷却效率的影响越明显，吹风比从0.3增大到1.5，高径比为0.6的柱肋比高径比为1柱肋的综合冷却效率提高了2%~3%；高径比为0.6的柱肋具有最大的相对压力损失，高径比为0.2和1柱肋的相对应力损失比高径比为0.6时低0.01%~0.07%。

As a kind of enhanced heat transfer technology in cooling channel, pinfins are of great significance to improve the cooling efficiency of doublewall cooling configuration. In order to study the effect of pinfins on the cooling performance and flow field of the doublewall cooling configuration, the cooling efficiencies of two scales of the pinfins with the aspect ratio of 1, 0.6 and 0.2, and the blowing ratio of 0.3, 0.6, 1 and 1.5, respectively, were numerically simulated.The models with two scales include the original model and the scaleup model with equal scale amplification of 5 times. The results show that the effect of the change of the aspect ratio on the cooling efficiency of the original model is more obvious, while the aspect ratio has little effect on the cooling efficiency of the scaleup model;the influence of aspect ratio on cooling efficiency is more obvious with the increase of the blowing ratio. The blowing ratio increases from 0.3 to 1.5, and the combined cooling efficiency of pinfins with the aspect ratio of 0.6 increases by 2% to 3% than that with the aspect ratio of 1; at the same time, the pinfins with the aspect ratio of 0.6 have the largest relative pressure loss, and those with the aspect ratio of 0.2 and 1 have 0.01% to 0.07% lower relative pressure loss than that with the aspect ratio of 0.6.

TK124

国家科技重大专项（2017-V-0012-0064）