为了提高航天器中电子器件的冷却效率,本文利用干式腐蚀方法形成方柱微结构,通过控制加热电流方法,在北京落塔进行了持续3.6 s有效微重力时间的过冷FC-72池沸腾强化换热实验研究。研究结果表明：相比光滑表面,方柱微结构表面利用其独立于重力水平的毛细作用力,显著地强化了微重力沸腾换热。
For the purpose of cooling electronic devices in space systems with high heat flux efficiently, experiments of highly subcooled pool boiling of FC-72 on micro-pin-finned surface structure were studied in short-term microgravity utilizing Drop-Tower Beijing with duration of about 3.6 s.The micro-pin-fins were fabricated on the silicon chip surface with the dry etching technique.The silicon chip was heated by means of controlling heating dc current for the desired heat flux.The bubble behavior for a smooth surface was also provided for comparison.The results indicated that the performance of high efficient heat transfer on micro-pin-finned surface is independent of the gravity, which stems from the sufficient supply of fresh liquid to the heater surface due to the capillary forces.
参考文献
| [1] | J. P. O'Connor;S. M. You .A painting technique to enhance pool boiling heat transfer in saturated FC-72[J].Journal of heat transfer: Transactions of the ASME,1995(2):387-393. |
| [2] | Wei JJ;Guo LJ;Honda H .Experimental study of boiling phenomena and heat transfer performances of FC-72 over micro-pin-finned silicon chips[J].Heat and mass transfer,2005(8):744-755. |
| [3] | J.J. Wei;H. Honda .Effects of fin geometry on boiling heat transfer from silicon chips with micro-pin-fins immersed in FC-72[J].International Journal of Heat and Mass Transfer,2003(21):4059-4070. |
| [4] | Aixiang Ma;Jinjia Wei;Minzhe Yuan;Jiabin Fang .Enhanced flow boiling heat transfer of FC-72 on micro-pin-finned surfaces[J].International Journal of Heat and Mass Transfer,2009(13/14):2925-2931. |
| [5] | 薛艳芳,魏进家,赵建福,李晶,郭栋,万士昕.微重力下光滑表面上FC-72的池沸腾实验研究[J].工程热物理学报,2011(03):423-426. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%