Heat Transfer Analysis of a Combined Piezoelectric Fan -Translational Agitator Cooling System

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Enhanced Heat Transfer Pub Date : 2023-12-01 DOI:10.1615/jenhheattransf.2023049372

Rutuja Ramachandra Bilaskar, Abhishek Singh, Sripriya Ramamoorthy, Shankar Krishnan

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引用次数: 0

Abstract

This paper investigates the heat transfer characteristics of a channel system consisting of a finned heat sink and two piezoelectric devices, the piezoelectric fan (PF) and the piezoelectric translational agitator (PTA), both experimentally and computationally. In the proposed system, the mean flow is generated by a cantilevered PF, and the flow between the fins is agitated using a PTA. A single channel system consisting of a PTA, the PF, and two fins is analyzed numerically using ANSYS Fluent software after validating numerical predictions against experimental measurements. The effect of design variables such as frequency ratio, phase difference, PF's tip distance from PTA, and squeezing fraction is explored. A PTA increases the heat transfer from the heated surfaces without incrementally aiding in the mass flow rate. Velocity and temperature fields are plotted to understand the physics of the system for one complete cycle of a PTA blade. The concept of total Reynolds number that incorporates the effect of both axial and transverse fluid flow is used in this study. The Nusselt number increases with an increment in the total Reynolds number. It is noted that the integration of the PF and the PTA with the finned heat sink system has enhanced the heat transfer coefficient by 76.88% compared to the system with PTA and by 30.92% as compared to the system with the PF only.

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压电风扇-平动搅拌器组合冷却系统的传热分析

本文从实验和计算两方面研究了由翅片式散热器和两个压电器件——压电风扇(PF)和压电平移搅拌器(PTA)组成的通道系统的传热特性。在所提出的系统中，平均流量是由悬臂式PF产生的，而鳍片之间的流动是用PTA搅拌的。利用ANSYS Fluent软件对由PTA、PF和两个翅片组成的单通道系统进行了数值分析，并对数值预测与实验测量结果进行了验证。探讨了频率比、相位差、PF与PTA的尖端距离和压缩分数等设计变量对压缩效果的影响。PTA增加了被加热表面的热传递，而没有增加质量流率。绘制了速度场和温度场，以了解PTA叶片一个完整周期的系统物理特性。本研究采用了考虑了流体轴向和横向流动影响的总雷诺数概念。努塞尔数随总雷诺数的增加而增加。结果表明，将PF和PTA集成到翅片散热器系统中，传热系数比含PTA的系统提高了76.88%，比仅含PF的系统提高了30.92%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Enhanced Heat Transfer 工程技术-工程：机械

CiteScore

3.60

自引率

8.70%

发文量

审稿时长

12 months

期刊介绍： The Journal of Enhanced Heat Transfer will consider a wide range of scholarly papers related to the subject of "enhanced heat and mass transfer" in natural and forced convection of liquids and gases, boiling, condensation, radiative heat transfer. Areas of interest include: ■Specially configured surface geometries, electric or magnetic fields, and fluid additives - all aimed at enhancing heat transfer rates. Papers may include theoretical modeling, experimental techniques, experimental data, and/or application of enhanced heat transfer technology. ■The general topic of "high performance" heat transfer concepts or systems is also encouraged.