Xie Guo-Fu, Zhao Lei, Dong Yuan-Yuan, Li Yu-Guang, Zhang Shang-Lin, Yang Chen
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China.
Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China.
Micromachines (Basel). 2021 Feb 28;12(3):245. doi: 10.3390/mi12030245.
With the development of micromachining technologies, a wider use of microchannel heat sink (MCHS) is achieved in many fields, especially for cooling electronic chips. A microchannel with a width of 500 μm and a height of 500 μm is investigated through the numerical simulation method. Pin fins are arranged at an inclined angle of 0°, 30°, 45°, and 60°, when arrangement method includes in-lined pattern and staggered pattern. The effects of inclined angle and arrangement method on flow field and temperature field of MCHSs are studied when Reynolds number ranges from 10 to 300. In addition to this, quantitative analyses of hydraulic and thermal performance are also discussed in this work. With the increase of inclined angle, the variation of friction factor and Nusselt number do not follow certain rules. The best thermal performance is achieved in MCHS with in-lined fines at an inclined angle of 30° accompanied with the largest friction factor. Arrangement method of pin fins plays a less significant role compared with inclined angle from a general view, particularly in the Reynolds number range of 100~300.
随着微加工技术的发展，微通道散热器（MCHS）在许多领域得到了更广泛的应用，特别是用于冷却电子芯片。通过数值模拟方法研究了宽度为500μm、高度为500μm的微通道。针翅以0°、30°、45°和60°的倾斜角排列，排列方式包括顺排和错排。当雷诺数在10到300之间时，研究了倾斜角和排列方式对微通道散热器流场和温度场的影响。除此之外，本文还讨论了水力和热性能的定量分析。随着倾斜角的增加，摩擦系数和努塞尔数的变化没有遵循一定的规律。在倾斜角为30°的顺排针翅微通道散热器中实现了最佳热性能，同时摩擦系数最大。从总体来看，针翅的排列方式与倾斜角相比作用较小，特别是在雷诺数为100~300的范围内。
