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工程设计学报
Chin J Eng Design  2023, Vol. 30 Issue (4): 429-437    DOI: 10.3785/j.issn.1006-754X.2023.00.049
Theory and Method of Mechanical Design     
Design of spray cooling experiment device with swing excitation
Faxing ZHU1,2(),Yue DONG1,Hanxu WU1,Ke ZHAO1,Zhaolin CHEN1,Yanlong JIANG1()
1.College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.Hangzhou Hanpin Industrial Design Co. , Ltd. , Hangzhou 310000, China
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Abstract  

Spray cooling technology is widely used in the efficient heat transfer of airborne equipment with high heat flux. In order to better carry out the experimental research on the heat transfer characteristics of spray cooling, an spray cooling experiment device with swing excitation was designed and built. Firstly, by monitoring the experimental data such as temperature, pressure and flow rate, and analyzing the uncertainty of the heat sink wall temperature, heat flux density and heat transfer coefficient of the simulated heat source, the spray heat transfer chamber system, swing control system and data acquisition and analysis system were designed. Then, the feasibility of the designed device and method was verified by conducting steady spray cooling heat transfer characteristics experiments under swing excitation with different amplitudes. The results showed that spray cooling could be divided into three stages: submerged spray, semi-submerged spray and normal spray; the abnormal discharge of heat transfer waste liquid caused by swing excitation changed the heat transfer behavior of spray cooling, and the heat sink wall temperature and heat flux density fluctuated violently during the swing process; after the swing stopped, the liquid accumulation began to decrease; with the decrease of liquid accumulation height, the heat transfer characteristics of spray cooling changed. In the process of spray cooling, the heat sink wall temperature increased by 26.47% under swing excitation with different amplitudes, about 10.915 ℃; the heat flux density of copper column decreased by 5.42%, about 4.126 W/cm2. The designed experiment device is stable and reliable, and has certain value for the research and engineering application of the spray cooling heat transfer characteristics of airborne equipment.

Key words： spray cooling      uncertainty      fluid accumulation      swing excitation      heat transfer     
Received: 05 December 2022      Published: 04 September 2023
CLC:  TH 71  
Corresponding Authors: Yanlong JIANG     E-mail: 749952170@qq.com;jiang-yanlong@nuaa.edu.cn
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Faxing ZHU
Yue DONG
Hanxu WU
Ke ZHAO
Zhaolin CHEN
Yanlong JIANG
Cite this article:

Faxing ZHU,Yue DONG,Hanxu WU,Ke ZHAO,Zhaolin CHEN,Yanlong JIANG. Design of spray cooling experiment device with swing excitation. Chin J Eng Design, 2023, 30(4): 429-437.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2023.00.049     OR     https://www.zjujournals.com/gcsjxb/Y2023/V30/I4/429


摇摆激励喷雾冷却实验装置设计

喷雾冷却技术广泛应用于高热流密度机载设备的高效换热。为更好地开展喷雾冷却换热特性实验研究，设计并搭建了摇摆激励喷雾冷却实验装置。首先，通过监测温度、压力及流量等实验数据，以及对模拟加热源进行热沉壁面温度、热流密度和传热系数的不确定度分析，设计了喷雾换热腔系统、摇摆控制系统和数据采集分析系统。然后，通过开展不同幅度摇摆激励下的稳态喷雾冷却换热特性实验来验证所设计装置及方法的可行性。结果表明，喷雾冷却分为浸没喷雾、半浸没喷雾及正常喷雾三个阶段；摇摆激励引起的换热废液不正常排出导致喷雾冷却换热行为发生了变化，在摇摆过程中热沉壁面温度和热流密度剧烈波动；摇摆停止后积液开始不断减少，随着积液高度的不断降低，喷雾冷却换热特性随之变动。在喷雾冷却过程中，幅度不同的摇摆激励下热沉壁面温度的增幅最高可达26.47%，约升高了10.915 ℃；铜柱热流密度的降幅高达5.42%，约下降了4.126 W/cm2。所设计的实验装置稳定可靠，对机载设备喷雾冷却换热特性的研究和工程应用具有一定价值。


关键词： 喷雾冷却,  不确定度,  积液,  摇摆激励,  换热 
Fig.1 Scheme of spray cooling experiment device with swing excitation
Fig.2 Overall assembly drawing of spray heat exchange chamber system
Fig.3 Structure breakdown of spray heat exchange chamber system
Fig.4 Schematic diagram of internal section of spray heat exchange chamber system
Fig.5 Copper column cross-sectional view
Fig.6 Schematic diagram of coordinate system of spray heat exchange chamber
Fig.7 Hardware block diagram of servo motor controller
Fig.8 Flow of servo motor control
Fig.9 Physical picture of spray cooling experiment device with swing excitation
Fig.10 Experimental flow of spray cooling under swing excitation
Fig.11 Variation curve of heat sink wall temperature of copper column under different swing excitation
Fig.12 Variation curve of heat flux density of cooper column under different swing excitation
Fig.13 Spray area washed by liquid accumulation with swing amplitude of 105°
Fig.14 Spray cooling stage with swing amplitude of 105°
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