超声波场中蒸汽气泡凝结过程及传热特性

doi:10.11949/j.issn.0438-1157.20150413

化工学报 ›› 2015, Vol. 66 ›› Issue (11): 4359-4365.DOI: 10.11949/j.issn.0438-1157.20150413

超声波场中蒸汽气泡凝结过程及传热特性

唐继国¹, 阎昌琪¹, 孙立成²

1 哈尔滨工程大学核安全与仿真技术国防重点学科实验室, 黑龙江哈尔滨 150001;
2 四川大学水利水电学院, 水力学与山区河流开发保护国家重点实验室, 四川成都 610065

收稿日期:2015-04-02 修回日期:2015-07-13 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: 阎昌琪
基金资助:
国家自然科学基金项目(51376052,11475048);四川大学科研基金项目(YJ201432)。

Condensation process and heat transfer of vapor bubbles in ultrasonic field

TANG Jiguo¹, YAN Changqi¹, SUN Licheng²

1 Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, Heilongjiang, China;
2 State Key Laboratory of Hydraulics and Mountain River Engineering, College of Hydraulic and Hydra-electric Engineering, Sichuan University, Chengdu 610065, Sichuan, China

Received:2015-04-02 Revised:2015-07-13 Online:2015-11-05 Published:2015-11-05
Supported by:
supported by the National Natural Science Foundation of China (51376052,11475048) and the Scientific Research Foundation of Sichuan University (YJ201432).

摘要/Abstract

摘要：

利用高速摄像仪记录有、无超声波时注入过冷水中蒸汽气泡的凝结过程,以分析超声波对蒸汽气泡凝结过程及传热特性的影响。结果表明:在超声波场中,蒸汽气泡表面会形成晶格状毛细波,有效增加气泡表面积,并加强气泡周围流体热边界层扰动,从而导致凝结换热的强化及气泡凝结速度加快。基于15～60 K过冷度下,有、无超声波时较大蒸汽气泡凝结的实验数据,拟合得出有、无超声波时的气泡凝结换热经验关联式,预测误差在±30%以内。

关键词: 凝结, 强化换热, 超声波, 气液两相流, 传热

Abstract:

Condensation processes of vapor bubbles being injected into subcooled water with and without ultrasonic vibration were recorded by a high-speed video camera to analyze the effects of ultrasonic field on the condensation process and heat transfer of vapor bubbles. Experimental results indicated that the lattice shaped capillary wave formed on the bubble surface increased the condensation heat transfer area greatly and intensified the turbulence in the thermal boundary layer around the vapor bubble, enhancing condensation heat transfer and accelerating bubble condensation in the ultrasonic field. Based on experimental data of relatively large vapor bubbles at liquid subcooling of 15—60 K, empirical correlations were obtained for predicting the condensation heat transfer of vapor bubbles with and without ultrasonic, with deviations within ±30%.

Key words: condensation, enhancement of heat transfer, ultrasonic vibration, gas-liquid flow, heat transfer

中图分类号:

TK124

唐继国, 阎昌琪, 孙立成. 超声波场中蒸汽气泡凝结过程及传热特性[J]. 化工学报, 2015, 66(11): 4359-4365.

TANG Jiguo, YAN Changqi, SUN Licheng. Condensation process and heat transfer of vapor bubbles in ultrasonic field[J]. CIESC Journal, 2015, 66(11): 4359-4365.

参考文献 27

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[23]	Kalman H, Mori Y H. Experimental analysis of a single vapor bubble condensing in subcooled liquid [J]. Chem. Eng. J., 2002, 85: 197-206
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超声波场中蒸汽气泡凝结过程及传热特性

Condensation process and heat transfer of vapor bubbles in ultrasonic field

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