微气泡发射沸腾形成机理

唐继国; 孙立成; 朱光昱

doi:10.13224/j.cnki.jasp.2014.04.006

微气泡发射沸腾形成机理

doi: 10.13224/j.cnki.jasp.2014.04.006

哈尔滨工程大学核科学与技术学院核安全与仿真技术国防重点学科实验室,哈尔滨 150001

基金项目:

教育部中央高校科研专项基金(HEUCFZ1122)

核安全与仿真技术国防重点学科实验室基金(HEUFN1102)

详细信息

作者简介:
唐继国(1988-),男,黑龙江哈尔滨人,博士生,主要从事沸腾换热研究.

中图分类号: V129;TK124
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出版历程
- 收稿日期: 2013-01-18
- 刊出日期: 2014-04-28

Formation mechanism of microbubble emission boiling

National Defense Key Subject Laboratory for Nuclear Safety and Simulation Technology, College of Nuclear Science and Technology, Harbin Engineering University,Harbin 150001,China

摘要

摘要: 为了探究具有超高换热性能的微气泡发射沸腾现象的形成机理,采用FLUENT软件对加热面上单个气膜周围的速度场进行数值模拟,并与实验结果进行对比.实验结果表明,对于水,微气泡发射沸腾现象发生时,加热壁面上会出现气膜破裂的过程,并且过冷度和壁面过热度的升高会加剧这一过程.对于酒精,微气泡发射沸腾现象很难发生.计算结果表明,在过冷条件下气膜周围存在marangoni对流,对于水而言,过冷度和壁面过热度的升高会增强气膜周围的marangoni对流过程,而在酒精气膜周围 marangoni对流相对较弱.因此由气膜周围强烈的marangoni对流过程引起的气液界面上的扰动可能造成气膜破裂,这可能是微气泡发射沸腾现象形成的原因之一.
- 临界热流密度 /
- 微气泡发射沸腾 /
- 过冷沸腾 /
- marangoni对流 /
- 气膜破裂
Abstract: In order to explore the mechanism of microbubble emission boiling with high heat transfer performance, numerical simulations were conducted for the velocity field around a single film on the heating surface with the software of FLUENT, and then compared with experimental results. Experimental results indicate that there exists the collapse of film on the heating surface as for water when microbubble emission boiling occurs, and the increase of subcooling and wall superheat would enhance the collapse of film. However, as for ethanol, microbubble emission boiling hardly occurs. Simulation results indicate that there exists marangoni convection around the film under subcooled condition. Moreover, increase of subcooling and surface superheat could enhance marangoni convection around film of water. However, marangoni convection is rather weak near the film of ethanol. Therefore, the disturbance caused by strong marangoni convection near the film at the interface of air and liquid may lead to the collapse of film. This may be one of the reasons triggering microbubble emission boiling.
- critical heat flux /
- microbubble emission boiling /
- subcooled boiling /
- marangoni convection /
- collapse of film

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参考文献(17)

[1]	Inada S,Miyasaka Y,Izumi R,et al.A study on boiling curves in subcooled pool boiling:1st report an effect of liquid subcooling on local heat transfer[J].Transaction of Japan Society of Mechanical Engineers,1981,47(417):852-861.(in Japanese)
[2]	Inada S,Miyasaka Y,Sakumoto S,et al.A study on boiling curves in subcooled pool boiling:2nd report an effect of contamination of surface on boiling heat transfer and collapse vapor slug[J].Transaction of Japan Society of Mechanical Engineers, 1981,47(422):2021-2029.(in Japanese)
[3]	Inada S,Miyasaka Y,Izumi R.A study on boiling curves in subcooled pool boiling:3rd report behaviors of bubble cluster and temperature fluctuations of heating surface[J].Transaction of Japan Society of Mechanical Engineers,1981,47(422):2030-2041.(in Japanese)
[4]	Inada S,Miyasaka Y,Izumi R,et al.A study on boiling curves in subcooled pool boiling:4th report heat transfer mechanism in transition boiling[J].Transaction of Japan Society of Mechanical Engineers,1981,47(423):2199-2208. (in Japanese)
[5]	Suzuki K,Inagaki F,Hong C.Subcooled boiling in the ultrasonic field:on the cause of microbubble emission boiling [J].Heat Transfer Engineering,2011,32(7/8):673-682.
[6]	Tange M,Yuasa M,Takagi S,et al.Microbubbles emission flow boiling in a microchannel and minichannel .New York:International Conference on Microchannels and Minichannels,2004.
[7]	Tange M,Watanabe M,Takagi S,et al.Microbubble emission boiling in a rectangular channel flow .Toronto,Canada:International Conference on Microchannels and Minichannels,2005.
[8]	WANG Guodong,CHENG Ping.Subcooled flow boiling and microbubble emission boiling phenomena in a partially heated microchannel [J].International Journal of Heat Mass Transfer,2009,52(1):79-91.
[9]	Suzuki K,Saitoh H,Matsumoto K.High heat flux cooling by microbubble emission boiling [J].Annuals of the New York Academy of Sciences,2002,974(1):364-377.
[10]	Nomura T,Shustov M,Suzuki K,et al.Subcooled flow boiling in mini and micro channel contribution toward high heat flux cooling technology for electronics .San Francisco,US:International Electronic Packaging Technical Conference and Exhibition,2009.
[11]	Zeigarnik Y A,Platonov D N,Khodakov K A,et al.Visualization of boiling of subcooled water [J].High Temperature,2011,49(4):566-570.
[12]	Kumagai S,Kawata K,Katagiri T,et al.Temperature and pressure fluctuation associated with bubble motion in microbubble emission boiling [J].The Society of Mechanical Engineers,2000,43(2):206-212.
[13]	Ueno I,Hattori Y,Hosoya R.Condensation and collapse of vapor bubbles injected in subcooled pool [J].Microgravity Science and Technology,2011,23(1):73-77.
[14]	WANG Hao,PENG Xiaofeng,Suresh V G,et al.Microbubble return phenomena during subcooled boiling on small wires [J].International Journal of Heat and Mass Transfer,2007,50(1):163-172.
[15]	Christopher D M,Wang H,Peng X F.Numerical analysis of the dynamics of moving vapor bubbles [J].International Journal of Heat and Mass Transfer,2006,49(19):3626-3633.
[16]	Carey V P.Liquid vapor phase-transition phenomena [M].New York:Hemisphere Publishing House,1992.
[17]	陆建峰,彭晓峰,丁静.微细丝上气泡射流间的相互作用特性[J].航空动力学报,2010,25(2):264-269. LU Jianfeng,PENG Xiaofeng,DING Jing.Interaction between bubble jet flows on thin wires [J].Journal of Aerospace Power,2010,25(2):264-269.(in Chinese)