Novel Unsteady Conjugate Cooling Mechanism

新型非稳态共轭冷却机制

• 批准号: EP/T006315/1
• 负责人: Qiang Zhang
• 金额: $ 40.21万
• 依托单位: City, University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FT006315%2F1
• 关键词: Novel; Unsteady; Conjugate; Cooling; Mechanism

Switching to electric vehicles becomes a global trend for carbon reduction. Battery cooling is one of the critical challenges to ensure the performance, safety, and reliability of electrochemical energy conversion and storage systems. In this era of digitalization, there is a surge of demand for high power density of electronic equipment. Efficient thermal management will play an important role in most of our future engineering applications. Flow pulsation helps our healthy blood flow system by periodically scrubbing away local accumulations in the blood vessels. Cooling efficiency could be greatly improved with the similar physical mechanism. This project proposes a novel unsteady thermal management methodology. Instead of distributing the fluids to a cooling network in a steady manner, the proposed scan-cooling method aims to control and optimize the flow unsteadiness by investigating additional design variables including scan frequency, amplitude, solid surface structure and conduction, etc. This project involves closely coupled experimental and numerical investigations. Experimentally, time-resolved flow and temperature fields will be captured by advanced optical flow measurement techniques. Both simplified and realistic cooling models will be tested and analyzed. Numerically, two novel features of unsteady fluid-thermal Conjugate Heat Transfer methodologies will be examined, validated and utilized in this study.The research outcome should open up new design space and potentially bring a step improvement for the existing thermal management methods.

转向电动汽车成为全球碳减排的趋势。电池冷却是确保电化学能量转换和存储系统的性能、安全性和可靠性的关键挑战之一。在这个数字化时代，对电子设备的高功率密度的需求激增。高效的热管理将在我们未来的大多数工程应用中发挥重要作用。流动脉动通过定期擦洗血管中的局部积聚物来帮助我们健康的血液流动系统。在相似的物理机制下，可以大大提高冷却效率。本计画提出一种新颖的非稳态热管理方法。建议的扫描冷却方法的目的是通过研究额外的设计变量，包括扫描频率，振幅，固体表面结构和传导，而不是以稳定的方式分配到冷却网络的流体控制和优化流动的不稳定性，该项目涉及紧密耦合的实验和数值研究。在实验上，时间分辨的流场和温度场将被先进的光学流量测量技术捕获。简化和现实的冷却模型将进行测试和分析。在数值计算方面，本文将对非稳态流-热耦合传热方法的两个新特点进行研究、验证和利用，其研究成果将为现有的热管理方法开辟新的设计空间，并可能带来一个新的进步。

项目成果

Enhanced thermal performance with high-amplitude intermittent impingement cooling

• DOI: 10.1016/j.ijheatmasstransfer.2021.122359
• 发表时间: 2022-04
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: Zhihan Zhang;Qianhui Li;C. Bruecker;Qiang Zhang

Micro-pillar sensor based wall-shear mapping in pulsating flows: In-situ calibration and measurements in an aortic heart-valve tester

基于微柱传感器的脉动流中的壁剪切映射：主动脉心脏瓣膜测试仪中的原位校准和测量

• DOI: 10.1016/j.jfluidstructs.2021.103346
• 发表时间: 2021
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: Li Q