逆载对管道内汽水两相流临界热流密度的影响

宋军辉; 宋保银; 张钊; 李冈

doi:10.13700/j.bh.1001-5965.2016.0331

逆载对管道内汽水两相流临界热流密度的影响

doi: 10.13700/j.bh.1001-5965.2016.0331

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 50576035

详细信息

作者简介:
宋军辉, 男, 硕士研究生。主要研究方向:矩形管道内两相流沸腾换热

宋保银, 男, 博士, 教授, 博士生导师。主要研究方向:传热与传质

张钊, 男, 博士。主要研究方向:两相流沸腾换热

李冈, 男, 硕士研究生。主要研究方向:两相流沸腾换热

通讯作者:
宋保银, E-mail:bysong@nuaa.edu.cn

中图分类号: V216
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出版历程
- 收稿日期: 2016-04-21
- 录用日期: 2016-09-02
- 网络出版日期: 2017-04-20

Effect of inverse load on critical heat flux of steam-water two-phase flow in a tube

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

Funds:

National Natural Science Foundation of China 50576035

More Information

Corresponding author: SONG Baoyin, E-mail: bysong@nuaa.edu.cn

摘要

摘要:
利用旋转平台对逆载作用下矩形通道内汽水两相流临界换热进行了实验研究。通过改变逆载大小、入口流体过冷度、流体质量流速等参数，获得了静止和逆载作用2种状态下矩形管道内汽水两相流临界换热实验数据。实验结果表明，质量流速随着加热时间的增长而减小，进出口压差则反之；临界状态下，质量流速随着逆载、过冷度的增大而减小；进出口压差随着逆载、质量流速的增大而增大，随着过冷度的增大而减小；临界热流密度值随着逆载、质量流速、入口过冷度的增大而增大；其中逆载对临界热流密度的影响最为显著，在逆载从0g~2.5g变换范围内，临界热流密度可提高50%。
- 矩形管道 /
- 两相流 /
- 临界热流密度 /
- 逆载 /
- 实验研究
Abstract:
An experimental investigation using a rotating platform was performed to obtain the critical heat transfer performance of steam-water two-phase flow in a rectangle tube under inverse load. By changing the parameters such as magnitude of inverse load, inlet subcooling and mass flow rate, the critical flow and heat transfer data of steam-water two-phase flow boiling under static and inverse load were obtained. The results show that mass flow rate decreases with continuous heating, but the variation of fluid pressure difference in the test section is opposite. At critical state, mass flow rate decreases with increasing inverse load and/or inlet subcooling. Fluid pressure difference increases with increasing inverse load and mass flow rate, and decreases with increasing inlet subcooling. The critical heat flux increases with increasing inverse load, mass flow rate and inlet subcooling. Inverse load greatly impacts critical heat flux. Within its changing range from 0g to 2.5g, the critical heat flux could be increased by 50%.
- rectangle channel /
- two-phase flow /
- critical heat flux /
- inverse load /
- experimental research

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图 1 实验系统简图

Figure 1. Schematic diagram of experimental apparatus

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图 2 实验段简图

Figure 2. Schematic diagram of test section

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图 3 壁面温度和热流密度随时间的变化

Figure 3. Variation of wall temperature and heat flux with time

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图 4 管道内临界沸腾状态影像

Figure 4. Image of critical boiling state in tube

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图 5 管道内流体压降和质量流速随时间的变化

Figure 5. Variation of fluid pressure drop and mass flow rate in tube with time

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图 6 质量流速随逆载的变化

Figure 6. Variation of mass flow rate with inverse load

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图 7 进出口压差随逆载的变化

Figure 7. Variation of fluid pressure difference with inverse load

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图 8 不同条件下临界热流密度的变化

Figure 8. Variation of critical heat flux under different conditions

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表 1 不同逆载下的加速度值

Table 1. Acceleration values under different inverse loads

逆载/g	向心加速度/(m·s^-2)	哥氏加速度/(m·s^-2)
0	0	0
0.5	4.9	2.0
1.0	9.8	2.5
1.5	14.7	3.9
2.0	19.6	4.1
2.5	24.5	4.6

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表 2 主要测量仪器及参数误差

Table 2. Main measuring instruments and parameter errors

测量仪器	量程	精度	参数误差/%
涡轮流量计	0~0.25 m³/h	1.0%	1.1
压力传感器	0~1 MPa	0.5%	0.51
Pt100热电阻	-200~420 ℃	±0.1 ℃	0.32

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