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Transient heat transfer characteristics in spray cooling

文献类型：期刊论文

作者Dong, Kewei1,2; Wu D(吴笛); Duan L(段俐); Kang Q(康琦); Wang J(王佳); Liu, Jianlin; Wang, Zhiwei3; Duan, Longsheng3
刊名ACTA MECHANICA SINICA
出版日期2023-07
卷号39期号:7页码:322344
ISSN号0567-7718
DOI10.1007/s10409-022-22344-x
英文摘要An experimental system of swirl spray cooling is designed to study the transient heat transfer efficiency of spray cooling with spray flow evolution. At an initial temperature of 300 & DEG;C, the spray cooling process is observed on a hot wall using a 20 mm x 20 mm square of aluminum alloy as the cooled specimen and water as the cooling medium. To measure the temperature variation, five high precision thermocouples are used at five different locations along the vertical axis of the cooling specimen. Using the finite difference method, the one dimensional unsteady heat conduction equation is solved, and the surface heat flux curve is obtained by inversion. The transient heat flux evolution curves under different working conditions are found by varying the spray height and flow rate. As a result, the spray cooling process is divided into four stages: I. the Leidenfrost effect stage (where the heat flux rises slowly), II. the liquid film formation stage (during which the heat flux rises sharply), III. the boiling stage (during which the heat flux decreases gradually), and IV. the convective evaporation stage (where the heat flux tends to equilibrium). As the heat flux reaches its peak value, the cooling process changes from the liquid film forming stage (stage II) to the boiling stage (stage III). The effect of spray height on liquid film is more significant when compared with the effect of pressure, which demonstrates that the heat transfer capacity at a spray height of 5 mm is significantly higher than at 10 mm and 15 mm, leading to the conclusion that the appropriate spray height is an important factor in maximizing the efficiency of spray cooling.
分类号二类
WOS研究方向Engineering, Mechanical ; Mechanics
语种英语
WOS记录号WOS:000938157100001
资助机构National Natural Science Foundation of China [12032020, 12072354, 12102438] ; Manned Space Program of China ; Strategic Priority Research Program on Space Science of Chinese Academy of Sciences ; China Postdoctoral Science Foundation [2019M660812] ; Natural Science Foundation of Shandong Province [ZR2018BA022]
其他责任者Liu, JL (corresponding author), China Univ Petr East China, Coll Pipeline & Civil Engn, Qingdao 266580, Peoples R China. ; Wang, J (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China. ; Duan, LS (corresponding author), Beijing Syst Design Inst Electromech Engn, Beijing 100039, Peoples R China.
源URL[http://dspace.imech.ac.cn/handle/311007/91830]  
专题力学研究所_国家微重力实验室
作者单位1.China Univ Petr East China, Coll Pipeline & Civil Engn, Qingdao 266580, Peoples R China
2.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
4.Beijing Syst Design Inst Electromech Engn, Beijing 100039, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Kewei,Wu D,Duan L,et al. Transient heat transfer characteristics in spray cooling[J]. ACTA MECHANICA SINICA,2023,39(7):322344.
APA Dong, Kewei.,吴笛.,段俐.,康琦.,王佳.,...&Duan, Longsheng.(2023).Transient heat transfer characteristics in spray cooling.ACTA MECHANICA SINICA,39(7),322344.
MLA Dong, Kewei,et al."Transient heat transfer characteristics in spray cooling".ACTA MECHANICA SINICA 39.7(2023):322344.

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来源：力学研究所

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