Abstract

The vortex-induced intensification of the laminar (at Re = 308) flow of transformer oil and heat transfer in a microtube with an in-line package of dimples with a depth of 0.26 of the tube diameter is calculated based on the Navier–Stokes equations and the energy equation. The heat-transfer increased by nearly 20 times for eight inclined oval-trench dimples spaced around the circumference and by 13 times for spherical dimples equal in area in comparison with that for a smooth tube; moreover, the relative hydraulic losses grow by approximately 30 and 60%, respectively.

中文翻译：

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变压器油泵送过程中带有球形和倾斜椭圆形凹坑的直列包装的微管中的传热增强

摘要

根据Navier–Stokes方程计算出微管的涡流引起的层流（在Re = 308时）的强化，以及微管中的管径为0.26的凹坑直列包装的微管中的传热。和能量方程式 与光滑管相比，在圆周上分布的八个倾斜的椭圆形沟槽酒窝的传热增加了近20倍，而面积相等的球形酒窝的传热增加了13倍；此外，相对水力损失分别增加了约30％和60％。