ABSTRACT

Experimental investigations on the pool boiling heat transfer enhancement and mechanisms for micropillared surfaces are performed. Two square micropillared MP 50–50 (Square) and MP 50–450 (Square)) and a circular micropillared MP 50–250 (Circular)) are fabricated on a copper substrate. Experimental results show that bubbles easily nucleate at the sharp corners of the square micropillars and MP 50–50 (Square) improves the capability of the micropillars, which leads to a higher boiling heat transfer performance. The critical heat flux is 151.41 W/cm² on MP 50–50 (Square), which is 32% higher than that of a smooth surface (114.78 W/cm²).

摘要

对池沸腾传热增强和微柱表面机理进行了实验研究。在铜基板上制造两个方形微柱 MP 50–50（方形）和 MP 50–450（方形））和一个圆形微柱 MP 50–250（圆形）。实验结果表明，气泡容易在方形微柱的尖角成核，MP 50-50（方形）提高了微柱的能力，从而导致更高的沸腾传热性能。MP 50-50（方形）上的临界热通量为 151.41 W/cm ²，比光滑表面（114.78 W/cm ²）高 32%。