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Experimental Study of Nucleate Pool Boiling of Fc-72 on Smooth Surface Under Microgravity
Xue YF; Zhao JF(赵建福); Wei JJ; Li J(李晶); Guo D; Wan SX(万士昕); Wei, JJ (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Sch Energy & Power Engn, Xian 710049, Peoples R China.
Source PublicationMICROGRAVITY SCIENCE AND TECHNOLOGY
2011
Volume23Pages:S75-S85
ISSN0938-0108
AbstractExperiments of highly subcooled nucleate pool boiling of FC-72 with dissolved air were studied both in short-term microgravity condition utilizing the drop tower Beijing and in normal gravity conditions. The bubble behavior and heat transfer of air-dissolved FC-72 on a small scale silicon chip (10 x 10 x 0.5 mm(3)) were obtained at the bulk liquid subcooling of 41 K and nominal pressure of 102 kPa. The boiling heat transfer performance in low heat flux region in microgravity is similar to that in normal gravity condition, while vapor bubbles increase in size but little coalescence occurs among bubbles, and then forms a large bubble remains attached to the heater surface during the whole microgravity period. Thermocapillary convection may be an important mechanism of boiling heat transfer in this case. With further increasing in heat flux to the fully developed nucleate boiling region, the vapor bubbles number as well as their size significantly increase in microgravity. Rapid coalescence occurs among adjacent bubbles and then the coalesced large bubble can depart from the heating surface during the microgravity period. The reason of the large bubble departure is mainly attributed to the momentum effects caused by the coalescence of small bubbles with the large one. Hence, the steady-state pool boiling can still be obtained in microgravity. In the high heat flux regime near the critical heat flux, significant deterioration of heat transfer was observed, and a large coalesced bubble forms quickly and almost covers the whole heater surface, leading to the occurrence of the critical heat flux in microgravity condition.
KeywordMicrogravity Pool Boiling Heat Transfer Thermocapillary Convection Coalescence
DOI10.1007/s12217-011-9274-5
Indexed BySCI ; EI
Language英语
WOS IDWOS:000208739100010
WOS Research AreaEngineering ; Thermodynamics ; Mechanics
WOS SubjectEngineering, Aerospace ; Thermodynamics ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [50806057, 10972225] ; program for new century excellent talents in university [NCET-07-0608]
DepartmentNML微重力两相流与燃烧
Classification二类/Q2
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58583
Collection国家微重力实验室
Corresponding AuthorWei, JJ (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Sch Energy & Power Engn, Xian 710049, Peoples R China.
Recommended Citation
GB/T 7714
Xue YF,Zhao JF,Wei JJ,et al. Experimental Study of Nucleate Pool Boiling of Fc-72 on Smooth Surface Under Microgravity[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2011,23:S75-S85.
APA Xue YF.,赵建福.,Wei JJ.,李晶.,Guo D.,...&Wei, JJ .(2011).Experimental Study of Nucleate Pool Boiling of Fc-72 on Smooth Surface Under Microgravity.MICROGRAVITY SCIENCE AND TECHNOLOGY,23,S75-S85.
MLA Xue YF,et al."Experimental Study of Nucleate Pool Boiling of Fc-72 on Smooth Surface Under Microgravity".MICROGRAVITY SCIENCE AND TECHNOLOGY 23(2011):S75-S85.
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