压电风扇与散热器组合系统的散热性能及其改进  

Heat dissipation performance of combined system of piezoelectric fan and heat sink and its improvement

作　　者：岳佳斌 朱敏波[1] 严松 YUE Jiabin;ZHU Minbo;YAN Song(School of Mechanical and Electrical Engineering, Xidian University, Xi’an 710000, China;CETC Maritime Electronics Research Institute Co., Ltd., Ningbo 315000, Zhejiang, China)

机构地区：[1]西安电子科技大学机电工程学院,西安710000 [2]中电科海洋电子研究院有限公司,浙江宁波315000

出　　处：《计算机辅助工程》2020年第3期51-55,共5页Computer Aided Engineering

摘　　要：为提高散热器的散热性能,将压电风扇分别与直肋和针肋式散热器组合进行散热,利用FLUENT软件仿真其散热流场并计算其协同角,分析2种散热器的散热性能特点。考虑压电风扇的振动特性,将直肋式散热器的肋片改为扇形布置,并根据仿真结果进一步将该散热器扇形肋片的后端改为针肋,设计新型散热器。根据散热器温度和协同角分布对散热器的散热性能进行评价分析,结果表明:自然散热时,针肋散热器的散热性能最好,且协同角相对较小;当压电风扇工作时,新型散热器散热性能最好,可比原直肋散热器组合温度降低4 K,比原针肋散热器组合温度降低2 K。新型散热器仅通过改变散热器的肋片布置即可明显改善散热器的散热性能。To improve the heat dissipation performance of the heat sink,the piezoelectric fan is combined with the plate-fin heat sink and the pin-fin heat sink respectively to dissipate heat,and FLUENT software is used to simulate the heat dissipation flow field and calculate the synergy angle,and then the heat dissipation characteristics of two kinds of heat sink are analyzed.Considering the vibration characteristics of piezoelectric fans,the plate-fin heat sink is improved to fan-shaped arrangement.According to the simulation results,the rear fin of the fan-shaped plate-fin heat sink is further improved to the pin-fin,and then the new heat sink is obtained.According to the heat sink temperature and synergy angle distribution,the heat dissipation performances of the heat sinks are evaluated and analyzed.The results show that:under natural heat dissipation,the heat dissipation performance of pin-fin heat sink is the best,and the synergy angle is relatively small;when combined with the piezoelectric fan,the heat dissipation performance of the new heat sink is the best,which is about 4 K lower to the plate-fin heat sink combination,and 2 K lower to the pin-fin heat sink combination.The heat dissipation performance of the new heat sink is obviously improved only by changing the fin arrangement.

关 键 词：压电风扇 散热器 协同角 仿真 

分 类 号：TP391.99[自动化与计算机技术—计算机应用技术] TN606[自动化与计算机技术—计算机科学与技术]