局部热点射流式微通道流动沸腾实验研究
Experimental Study on Localized Hot Spot Jet Impingement Flow Boiling
汤凯 1黄岩培 2郭元东 1林贵平 3杨琦 2苗建印 2黄金印2
作者信息
- 1. 北京航空航天大学航空科学与工程学院,人机工效与环境控制国防重点学科实验室,北京 100191
- 2. 北京空间飞行器总体设计部,空间热控技术北京市重点实验室,北京 100094
- 3. 杭州市北京航空航天大学国际创新研究院,杭州 311115;北京航空航天大学航空科学与工程学院,人机工效与环境控制国防重点学科实验室,北京 100191
- 折叠
摘要
本文提出了一种射流式微通道热沉用以解决高热流密度热点散热问题.以氨为工质,开展流动沸腾实验,研究对比了微通道与驻点区结构对热沉性能的影响.优化所得的"四周针肋+中心多圆锥"热沉在1 mm×6 mm热点区域752 W·cm-2的热负载下,可维持热源加热面温度低于57.1℃,对应热阻0.69 K·W-1,压损5.1 kPa.针对优选热沉开展的串联实验研究表明,上游热沉热负载的改变会导致下游热沉入口干度变化,进而影响其流动换热性能.
Abstract
This paper proposed a jet-impingement microchannel heat sink to address high-heat-flux hot spot cooling issues.Using ammonia as the working fluid,flow boiling experiments were conducted to comparatively study the impact of microchannels and stagnation point structures on the heat sink's performance.The optimized configuration,comprising peripheral pin fins and central multi-cone,effectively dissipated a heat load of 752 W·cm-2 within a 1 mmx6 mm hot spot area,maintaining the heating surface temperature below 57.1℃.The corresponding thermal resistance and pressure drop were 0.69 K·W-1 and 5.1 kPa,respectively.Subsequent experimentation on this optimized heat sink revealed that variations in the heat load upstream significantly influenced the inlet quality of the downstream heat sink,consequently impacting its thermal-hydraulic performance.
关键词
微通道热沉/射流冲击/流动沸腾/换热强化Key words
microchannel heat sink/jet impingement/flow boiling/heat transfer enhancement引用本文复制引用
基金项目
国家自然科学基金(52106067)
中国科协青年人才托举工程项目(2023QNRC001)
出版年
2024
NETL
NSTL
万方数据