采用三维数值模拟方法，研究不同Re（381、572、763、954、1144）下凹坑直径d（1.8、2.0和2.2 mm）、深度h（0.9、1.0和1.1 mm）、轴向距离p（10、12和14 mm）、周向距离l（5.236、6.283和7.854 mm）与布置型式（叉排、顺排）对高粘度润滑油横掠麻面管流动与传热的影响。结果表明：外壁周期性凹坑的存在使得麻面管油侧换热增强，同时减阻效果明显；相比于光管，当Re=381～1 144时，麻面管油侧Nu增加了28.6%～55.4%，阻力系数f减小了0.59%～26.9%，综合换热性能指标η为1.05～1.59。

Threedimensional numerical simulations are conducted for high viscosity lubricating oil across the pitted tube to investigate the influences of different Reynolds number Re (381,572,763,954,1 144),pit diameter d (1.8,2.0,2.2 mm),pit depth h (0.9,1.0,1.1 mm),pit axial distance p (10,12,14 mm),pit circumferential distance l (5.236,6.283,7.854 mm) and pit arrangement type (cross row,straight row) on heat transfer and flow characteristics.The results showed that the existence of periodic pits on the outer wall enhances the heat transfer at the oil side of the pitted tube,and the effect of drag reduction is evident; The Nu on the oil side of the pitted pipe is increased by 28.6%~55.4% and the drag coefficient f is decreased by 0.59%~26.9%,compared to the smooth pipe with Re=381~1 144,and the overall heat transfer performance index is between 1.05 and 1.59.

TK124

河北省自然科学基金（E2016203371,E2017203221）；燕山大学博士基金（B898）