对矩形通道内的球面凹坑壁面进行了传热系数和流动阻力测量,研究了通道Re数和凹坑间距的影响.无量纲流向间距分别为1.5,1.2和0.8.实验发现凹坑面上局部Nu数沿流向和横向变化剧烈.与光滑壁面相比,凹坑面的平均换热增强45%左右,流动阻力增大92%左右,平均综合传热性能增强16%.减小凹坑间距使流动阻力增大,平均换热和平均综合传热性能进一步增强.数据显示Re数对凹坑壁面的换热增强和流动阻力增大的影响相对较小. The heat transfer coefficient and flow resistance of the spherical pits in the rectangular channel were measured, and the influence of Reynolds number and pit spacing was studied. The dimensionless flow direction spacing was 1.5, 1.2 and 0.8 respectively. It was found that the local Compared with the smooth surface, the average heat transfer increases about 45%, the flow resistance increases about 92% and the average heat transfer performance increases by 16% The flow resistance increases, the average heat transfer and the average overall heat transfer performance increase further.The data shows that the Re number has a relatively small influence on the heat transfer enhancement and flow resistance increase of the dimple wall.