液体冷却并联通道热沉中的流量分配特性

doi:10.16183/j.cnki.jsjtu.2022.248

上海交通大学学报 ›› 2023, Vol. 57 ›› Issue (10): 1355-1366.doi: 10.16183/j.cnki.jsjtu.2022.248

所属专题：《上海交通大学学报》2023年“机械与动力工程”专题

液体冷却并联通道热沉中的流量分配特性

辛鹏飞¹, 苗建印², 匡以武¹, 张红星², 王文¹()

1.上海交通大学机械与动力工程学院,上海 200240
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 100086

收稿日期:2022-07-01 修回日期:2022-08-21 接受日期:2022-09-08 出版日期:2023-10-28 发布日期:2023-10-31
通讯作者: 王文 E-mail:wenwang@sjtu.edu.cn
作者简介:辛鹏飞(1997-),硕士生,从事微通道两相流系统稳定性研究.
基金资助:
国家重点基础研究项目(613322);国家自然科学基金(51906148)

Flow Distribution Characteristics in Microchannel Heat Sinks in Pumping Liquid Cooling System

XIN Pengfei¹, MIAO Jianyin², KUANG Yiwu¹, ZHANG Hongxing², WANG Wen¹()

1. School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, Beijing 100086, China

Received:2022-07-01 Revised:2022-08-21 Accepted:2022-09-08 Online:2023-10-28 Published:2023-10-31
Contact: WANG Wen E-mail:wenwang@sjtu.edu.cn

摘要/Abstract

摘要：

随着电子器件泵驱冷却要求的不断提高,针对多个分散单元的冷却需求不可避免,从而对作为热沉的并联微通道蒸发器散热均衡性有了更高的需求.但并联热沉由于流动特征曲线中负斜率区域的存在,会产生流量漂移的问题.对氨为工质的双并联热沉系统中的流量分配进行模拟分析,研究了进口过冷度、加热功率、进出口连接管道长度对单个蒸发器流动特征曲线的影响.同时探究了流量漂移对蒸发器整体温度分布的影响,以及加热功率、进口过冷度和进出口连接管道长度对并联热沉流量分配的影响规律.结果表明,一定范围内的蒸发器间流量漂移对冷却系统的换热能力影响有限;加热功率、进口温度、进出口连接管道的布置对并联热沉系统稳定性有着比较大的影响.

关键词: 微通道, 不稳定性, 流量漂移, 两相流, 数值模拟

Abstract:

With the continuous improvement of pump-driven liquid cooling requirements for electronic devices, the cooling requirements for multiple dispersed units are inevitable, resulting in higher requirements of equal cooling capacity for parallel microchannel evaporators. Because of the existence of negative slope region in the characteristic curve of two phase flow in microchannel sink, the flow excursion will occur. The flow distribution in the parallel microchannel evaporator is simulated with ammonia as the working medium, and the effects of inlet subcooling degree, heat flux and length of connecting pipe on flow characteristic curve in a microchannel evaporator are studied. Besides, the influence of flow excursion on the overall temperature distribution of evaporator, and the influence of heat flux, inlet subcooling degree, and length of connecting pipe on the flow distribution of two parallel evaporators are investigated. The results show that the flow excursion between evaporators does not necessarily deteriorate the heat transfer capacity of the system, and the arrangement of heating flux, inlet and outlet connecting pipes has a great influence on the stability of the parallel evaporator system.

Key words: microchannel, instability, flow excursion, two-phase flow, numerical simulation

中图分类号:

TK124

辛鹏飞, 苗建印, 匡以武, 张红星, 王文. 液体冷却并联通道热沉中的流量分配特性[J]. 上海交通大学学报, 2023, 57(10): 1355-1366.

XIN Pengfei, MIAO Jianyin, KUANG Yiwu, ZHANG Hongxing, WANG Wen. Flow Distribution Characteristics in Microchannel Heat Sinks in Pumping Liquid Cooling System[J]. Journal of Shanghai Jiao Tong University, 2023, 57(10): 1355-1366.

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液体冷却并联通道热沉中的流量分配特性

Flow Distribution Characteristics in Microchannel Heat Sinks in Pumping Liquid Cooling System

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