微通道型气泡泵驱动两相流传热特性  

Study on two-phase flow heat transfer characteristics driven by microchannel bubble pump

作　　者：田镇岭 陈志豪[1,2] 宇高义郎 TIAN Zhenling;CHEN Zhihao;UTAKA Yoshio(School of Mechanical Engineering,Tianjin University,Tianjin 300350,China;State Key Laboratory of Engines(Tianjin University),Tianjin 300350,China)

机构地区：[1]天津大学机械工程学院,天津300350 [2]先进内燃动力全国重点实验室,天津300350

出　　处：《化工学报》2024年第10期3452-3463,共12页CIESC Journal

基　　金：国家重点研发计划项目(2021YFE0192800)。

摘　　要：基于沸腾现象的浸没式液冷技术适用于芯片(服务器、数据中心等)以及电机冷却等,可实现冷却系统的模块化、集成化和小型化,具有广阔的应用前景。在浸没式液冷系统的开发中,通常希望在不影响系统性能的前提下,尽量减少冷却工质的充填量。提出气泡泵技术,降低冷却系统中液体工质充填量,同时利用沸腾气泡驱动的气液两相上升流作为动力,驱动工质循环冷却整个系统。选取Novec-7100为工质,建立可视化实验系统,针对气泡泵驱动的气液两相流动特性、气液输运性能以及传热性能展开研究。结果表明,所构建的3 mm×3 mm微通道型气泡泵冷却系统,在120 mm的冷却液浸没高度下实现了所选取参数范围内的最佳性能,可在0.89~9.68W/m^(2)的热通量范围内实现两相流循环输运。The immersion liquid cooling technology based on boiling phenomenon is suitable for chip(server,data center,etc.)and motor cooling,which can realize the modularization,integration and miniaturization of cooling system and has broad application prospects.In the development of an immersion cooling system,it is usually hoped to minimize the volume of working fluid without affecting the performance of the system.Therefore,this study proposed a bubble pump technology to reduce the filling volume of the working fluid by circulating it in the cooling system,utilizing the two-phase rising flow induced by boiling bubbles as the driving force.In this study,Novec-7100 was selected as the working fluid and an experimental system with the ability to visualize the bubble behaviors was established,and the characteristics of vapor-liquid two-phase flow,the performance of vapor/liquid transportation,and the performance of heat transfer were examined.As a result,it was found that the best performance of the bubble pump can be achieved for the microchannel with the cross-section of 3 mm×3 mm,within the range of conditions adopted in this study.This type of bubble pump can normally operate for the heat flux in the range of 0.89—9.68 W/m^(2) when 120 mm of the channel is immersed in the working fluid.

关 键 词：沸腾 浸没式冷却 微通道 气泡泵 气液两相流 传热 

分 类 号：TK114[动力工程及工程热物理—热能工程]