顺载和管径对管内水沸腾两相流流动性的影响

马启成; 宋保银; 单绍荣

顺载和管径对管内水沸腾两相流流动性的影响

南京航空航天大学航空宇航学院,南京 210016

基金项目: 国家自然科学基金资助项目(50576035); 高等学校博士学科点专项科研基金项目(20040287017)

详细信息

作者简介:
马启成(1985-),男,山东临沂人,硕士生,sdmaqicheng@163.com.

中图分类号: V 211.1
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- 被引次数: 0
出版历程
- 收稿日期: 2010-04-13
- 网络出版日期: 2011-08-30

Effects of driving load and pipe diameter on flow characteristic of two-phase boiling water

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016,China

摘要

摘要: 利用地面转台旋转产生的离心力模拟飞行过载,并在此过载作用下进行了不同管径内沸水两相流实验.通过改变过载大小、管径、沸水流量等参数,得到沸水流动特性的初步变化规律,并对顺载作用下沸水的流型进行了拍摄.结果显示顺载和管径对沸水的流动会产生明显的影响.顺载作用使管内出现了一些新流型,并且增加了流动的不稳定性.压差随顺载的增大而减小,且管径越大其减小的程度越大.实验结果增加了动载下管道内工质流动特性的数据积累,同时对飞行器上蒸发循环制冷系统的理论分析和设计提供一定的借鉴和参考.
- 顺载 /
- 管径 /
- 沸水 /
- 实验研究
Abstract: The centrifugal force resulted from a rotational platform was used to simulate the flying load and the experiment of two-phase boiling water flowing in different diameter pipes under driving load was conducted. By changing the parameters, such as driving load, pipe diameter, flow rate, and so on, some flow characteristics of the boiling water were obtained. The image of flow patterns under dynamic load was obtained with a video camera. The results reveal that the dynamic load whose direction is the same as the flow direction and pipe diameter dramatically influence the flow characteristic of the boiling water. Some new flow patterns were observed under dynamic load. In addition, the dynamic load weakens the flow stability of the boiling water. The greater the dynamic load, the lower the pressure drop. And for a bigger diameter pipe, the pressure drop will decrease more obviously. The experimental data can be added to the database in the flow characteristic of gas-liquid two-phase pipe flow under dynamic load, and can be a reference in developing the vapor-cycle cooling system for flying vehicles.
- driving load /
- pipe inner diameter /
- boiling water /
- experimental research

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参考文献(1)

[1] 吴晓丽,张兴娟,袁修干.直升机蒸汽循环制冷系统技术现状与展望[J].中国安全科学学报,2004,14(6):57-59 Wu Xiaoli,Zhang Xingjuan,Yuan Xiugan.Current status and perspective of cooling system of helicopter using steam cycling technique[J].China Safety Science Journal,2004,14(6):57-59(in Chinese) [2] 吕成道,李佛金,程尚模,等.微重力下两相流动沸腾换热综述[J],上海航天,1997(5):44-48 Lü Chengdao,Li Fojin,Cheng Shangmo,et al.Review of two-phase flow boiling heat transfer at microgravity[J].Shanghai Astronautics,1997(5):44-48(in Chinese) [3] 闫旭东.旋转状态下倾斜管内两相流动与传热特性 .南京:南京航空航天大学航空宇航学院,2008 Yan Xudong.Flow and heat transfer characteristic of two-phase fluid in inclined pipes on a rotation platform .Nanjing:College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,2008(in Chinese) [4] 姚秋萍,宋保银,马良军.动载下水平管内气水两相流流动特性[J].工程热物理学报,2008,29(8):1327-1330 Yao Qiuping,Song Baoyin,Ma Liangjun.Flow characteristic of air-water two-phase flow in a horizontal pipe under high gravity[J].Journal of Engineering Thermophysics,2008,29(8):1327- 1330(in Chinese) [5] 单绍荣.管径及侧向载荷对管内沸腾两相流流动和传热影响 .南京:南京航空航天大学航空宇航学院,2010 Shan Shaorong.Effects of pipe diameter and dynamic load on the flow and heat transfer characteristics of two-phase boiling flow .Nanjing:College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,2010(in Chinese) [6] 闫旭东.机载蒸发循环系统两相流换热特性试验研究[J].制冷与空调,2008,22(6):7-11 Yan Xudong.Experimental investigation on the heat transfer characteristic of two-phase flow in an onboard vapor cycle system[J].Refrigeration and Air Conditioning,2008,22(6):7-11(in Chinese) [7] 姚秋萍,宋保银,赵枚.动载下水平管内流动水沸腾两相流型实验研究[J].中国科技论文在线,2009,2(10):1111-1116 Yao Qiuping,Song Baoyin,Zhao Mei.Experiment reseach on two-phase flow pattern of boiling water flowing in a horizontal pipe under Hi-G condition[J].Science Paper Online,2009,2(10):1111-1116 (in Chinese) [8] Song F,Ewing D,Ching C Y.Experimental investigation on the heat transfer characteristics of axial rotating heat pipes[J].International Journal of Heat and Mass Transfer,2004,47(22):4721- 4731

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