R134a卧式螺旋管内沸腾两相流型与传热特性实验研究

邵莉; 刘利民; 苑伟; 韩吉田; 陈常念

doi:10.7538/yzk.2013.47.03.0391

R134a卧式螺旋管内沸腾两相流型与传热特性实验研究

1.
山东大学能源与动力工程学院,山东济南250061
2.
山东省冶金设计院股份有限公司,山东济南250061
3.
山东海科化工集团,山东东营257029

计量
- 文章访问数: 372
- HTML全文浏览量: 0
- PDF下载量: 1200
出版历程
- 刊出日期: 2013-03-19

Study on Two-Phase Flow Boiling Patterns and Heat Transfer of R134a in Horizontal Helically-Coiled Pipe

1.
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
2.
Shandong Metallurgy Design Institute Co., Ltd., Jinan 250061, China
3.
Shandong Haike Chemical Group, Dongying 257029, China

摘要

摘要: 在蒸发温度为5～15 ℃、热流密度范围为5～20 kW·m^-2、工质质量流速变化范围为50～500 kg·m^-2·s^-1和干度范围为0.01～0.9的条件下，对R134a在卧式螺旋管内的沸腾两相流型及传热特性进行了实验研究。利用可视化技术对流型进行了观察分析，发现在相同工况条件下，卧式螺旋管上升段和下降段的流型有所不同，特别是形成环状流之前存在明显不同的过渡流型，分别为波环状流型和超大气弹流型，因此，对上升段和下降段分别建立了流型图。获得了传热系数随工质的干度、质量流速和热流密度等参数的变化关系，发展了R134a在卧式螺旋管内流动沸腾传热系数的计算关联式。
- 沸腾两相流 ,
- 流型 ,
- 传热特性 ,
- 卧式螺旋管 ,
- R134a
Abstract: The experimental study on flow boiling patterns and heat transfer of R134a in horizontal helically-coiled pipe was presented. The experiment was carried out at saturation temperature from 5 to 15 ℃, with the refrigerant mass flux varying from 50 to 500 kg·m^-2·s^-1, heat flux varying from 5 to 20 kW·m^-2, and the vapor quality ranging from 0.01 to 0.9. The flow patterns were observed and analyzed through visualization experiment. It is found that the flow patterns in the upflow and downflow sections are different under the same conditions, especially the transition flow patterns before the annular flow are obviously different, which are wave annular flow and super slug flow in the upflow and downflow sections, respectively, so two different flow pattern maps are proposed for the upflow and downflow sections, respectively. The effects of vapor quality, mass flow rate and heat flux on the boiling heat transfer coefficients were obtained, and the new correlation was developed for predicting the flow boiling heat transfer coefficients of R134a in horizontal helically-coiled pipe.
- two-phase flow boiling ,
- flow pattern ,
- heat transfer ,
- horizontal helically-coiled pipe ,
- R134a

HTML全文

参考文献(15)

[1]	郭烈锦. 两相与多相流动力学[M]. 西安：西安交通大学出版社，2002：1-4.
[2]	施明恒，甘永平，马重芳. 沸腾和凝结[M]. 北京：高等教育出版社，1995.
[3]	OWHADI A, BELL K J, CRAIN B. Forced convection boiling inside helically coiled tubes[J]. International Journal of Heat and Mass Transfer, 1968, 11(12): 1779-1793.
[4]	WATANABE O, TAJIMA O, SHIMOYA O. Flow and heat transfer of gas and liquid two-phase flow in helical coils[J]. Transactions of the Japan Society of Mechanical Engineers: Part B, 1986, 52: 1857-1864.
[5]	ZHAO Liang, GUO Liejin, BAI Bofeng, et al. Convective boiling heat transfer and two-phase flow characteristics inside a small horizontal helically coiled tubing once-through steam generator[J]. International Journal of Heat and Mass Transfer, 2003, 46(25): 4779-4788.
[6]	白博峰，郭烈锦. 卧式螺旋管内流动沸腾传热研究[J]. 核科学与工程，1997，17(4)：302-308. BAI Bofeng, GUO Liejin. Investigation of flow boiling heat transfer in horizontal helical coils[J]. Chinese J Nucl Sci Eng, 1997, 17(4): 302-308(in Chinese).
[7]	CUI W Z, LI L J, XIN M D, et al. A heat transfer correlation of flow boiling in micro-fin helically coiled tube[J]. International Journal of Heat and Mass Transfer, 2006, 49(17): 2851-2858.
[8]	邵莉，韩吉田，陈文文，等. R134a卧式螺旋管内沸腾流型与阻力特性实验研究[J]. 工程热物理学报，2010，31(6)：1045-1048. SHAO Li, HAN Jitian, CHEN Wenwen, et al. Study on flow boiling pattern and pressure drop of R134a in helical coils[J]. Journal of Engineering Thermophysics, 2010, 31(6): 1045-1048(in Chinese).
[9]	陈常念，韩吉田，邵莉，等. R134a卧式螺旋管内流动沸腾CHF特性研究[J]. 核动力工程，2010，31(6)：76-80. CHEN Changnian, HAN Jitian, SHAO Li, et al. Study on dry-out CHF characteristics of R134a flow boiling in horizontal helically-coiled tubes[J]. Nuclear Power Engineering, 2010, 31(6): 76-80(in Chinese).
[10]	朱明善，韩礼钟，李立，等. 绿色环保制冷剂HFC-134a热-物理性质[M]. 北京：科学出版社，1995.
[11]	MOFFAT R J. Describing uncertainties in experimental results[J]. Experimental Thermal Fluid Science, 1988, 1(1): 3-7.
[12]	KATTAN N, THOME J R, FAVRAT D. Flow boiling in horizontal tubes: Part Ⅰ. Development of a diabatic two phase flow pattern map[J]. Journal of Heat Transfer Transactions of the ASME, 1998, 120: 140-147.
[13]	ZUCHER O, FAVRAT D, THOME J R. Development of a diabatic two-phase flow patter map for horizontal flow boiling[J]. International Journal of Heat and Mass Transfer, 2002, 45(2): 291-301.
[14]	MARTINELLI R C, NELSON D B. Prediction of pressure drop during forded circulation of water[J]. Journal of Heat Transfer-Transactions of the ASME, 1948, 70(4): 659-702.
[15]	KOZEKI M, NARIAI H, FURUKAWA T, et al. A study of helically coiled tube once through steam generator[J]. Bulletin of Japan Society of Mechanical Engineers, 1970, 13(6): 1485-1494.

施引文献

资源附件(0)

计量

文章访问数: 372
HTML全文浏览量: 0
PDF下载量: 1200
被引次数: 0

R134a卧式螺旋管内沸腾两相流型与传热特性实验研究

计量

出版历程

Study on Two-Phase Flow Boiling Patterns and Heat Transfer of R134a in Horizontal Helically-Coiled Pipe

计量

出版历程

目录