基于凝结实验平台的音速喷嘴凝结现象研究

王超; 林大烜; 丁红兵; 王刚; 安海骄

doi:10.13700/j.bh.1001-5965.2017.0074

基于凝结实验平台的音速喷嘴凝结现象研究

doi: 10.13700/j.bh.1001-5965.2017.0074

王超^{1, 2},
林大烜^{1, 2},
丁红兵^{1, 2, ,},
王刚^{1, 2},
安海骄³

1.
天津大学电气自动化与信息工程学院, 天津 30007
2.
天津市过程检测与控制重点实验室, 天津 300072
3.
天津市计量监督检测科学研究院, 天津 300192

基金项目:

国家自然科学基金 61627803

国家自然科学基金 51506148

国家自然科学基金 61673291

天津市自然科学基金 16JCQNJC03700

天津市重点实验室基金 TKLPMC-201611

详细信息

作者简介:
王超男, 博士, 教授。主要研究方向:电学层析成像、多相流测量和生物阻抗检测

丁红兵男, 博士, 讲师。主要研究方向:多相流测量、气体流量传感器

通讯作者:
丁红兵, E-mail: hbding@tju.edu.cn

中图分类号: TH814
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-16
- 录用日期: 2017-05-19
- 网络出版日期: 2017-11-20

Study on condensation in sonic nozzle based on experimental condensation apparatus

WANG Chao^{1, 2},
LIN Daxuan^{1, 2},
DING Hongbing^{1, 2
, ,},
WANG Gang^{1, 2},
AN Haijiao³

1.
School of Electrical and Information Engineering, Tianjin University, Tianjin 30007
2.
Tianjin Key Laboratory of Process Measurement and Control, Tianjin 300072, China
3.
Tianjin Institute of Metrological Supervision and Testing, Tianjin 300192, China

Funds:

National Natural Science Foundation of China 61627803

National Natural Science Foundation of China 51506148

National Natural Science Foundation of China 61673291

Natural Science Foundation of Tianjin 16JCQNJC03700

Research Fund of Tianjin Key Laboratory TKLPMC-201611

More Information

Corresponding author: DING Hongbing, E-mail: hbding@tju.edu.cn

摘要

摘要:
音速喷嘴中流动的蒸汽或含湿气体由于自身的温降而发生凝结现象，对音速喷嘴的计量会产生一定的影响。针对音速喷嘴凝结现象和自激振荡的复杂变化情况，利用一套凝结实验平台研究了音速喷嘴内湿空气凝结现象，得到了不同条件的喷嘴沿程压力，并建立了凝结流动Eulerian两相模型，对凝结现象的影响因素进行了数值分析，使实验结果得到了验证和补充。结果表明，载气的压力、温度、湿度会对凝结产生比较大的影响。凝结发生位置伴随载气温度、湿度的提高而前移，强度有所增大。随着载气压力的增大，凝结发生位置前移，但是强度相对减弱。自激振荡的频率与载气湿度、温度呈正相关，与载气压力呈负相关，振幅与载气的压力、温度、湿度均呈正相关。
- 音速喷嘴 /
- 超音速流动 /
- 凝结现象 /
- 数值模型 /
- 自激振荡
Abstract:
The temperature of water vapor and moist gas will drop greatly in the sonic nozzle, which leads to the condensation and will have a great effect on the measurements. Aimed at the phenomenon of condensation and self-oscillation of sonic nozzle, an experimental condensation apparatus was set up to observe the condensation of moist air in sonic nozzle, and the pressure distribution under different conditions was obtained. To validate and supplement the experimental data, a gas-liquid two-phase flow Eulerian model was established through numerical analysis of influence factors on condensation. The results show that the inlet pressure, humidity and temperature have a great influence on condensation phenomenon. With the increase of humidity and temperature, the location of condensation moves forward and the intensity also increases. With the increase of the inlet pressure, the location of condensation moves forward, while the intensity weakens. The frequency of self-oscillation is positively related to the humidity and temperature, and negatively related to the inlet pressure. The amplitude is positively related to the inlet pressure, humidity and temperature.
- sonic nozzle /
- supersonic flow /
- condensation /
- numerical model /
- self-oscillation

HTML全文

图 1 音速喷嘴结构

Figure 1. Sonic nozzle structure

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图 2 Wilson线在焓熵(h-s)图中的走势

Figure 2. Tendency of Wilson line in an enthalpy-entropy(h-s) map

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图 3 音速喷嘴中膨胀凝结过程

Figure 3. Expansion and condensation process in sonic nozzle

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图 4 凝结实验平台结构

Figure 4. Structure of experimental condensation apparatus

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图 5 高压雾化装置

Figure 5. High-pressure atomization generator

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图 6 实验喷嘴结构和尺寸

Figure 6. Structure and size of experimental nozzle

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图 7 沿程压力采集系统

Figure 7. Acquisition system of pressure distribution at nozzle wall

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图 8 CFD仿真与实验数据对比

Figure 8. Comparison between CFD simulation and experimental data

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图 9 不同入口湿度下喷嘴壁面压力分布

Figure 9. Pressure distribution at nozzle wall with different inlet humidity

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图 10 不同入口温度下喷嘴壁面压力分布

Figure 10. Pressure distribution at nozzle wall with different inlet temperatures

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图 11 不同入口压力下喷嘴壁面压力分布

Figure 11. Pressure distribution at nozzle wall with different inlet pressure

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图 12 不同入口压力下喷嘴壁面压力分布(CFD)

Figure 12. Pressure distribution at nozzle wall with different inlet pressure (CFD)

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图 13 不同入口温度下喷嘴壁面压力分布(CFD)

Figure 13. Pressure distribution at nozzle wall with different inlet temperatures (CFD)

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图 14 动态压力测试

Figure 14. Dynamic pressure test

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图 15 不同自激振荡模式下频率和幅值与过冷度关系

Figure 15. Relationship between frequency and amplitude and degree of supercooling under different self-oscillation modes

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表 1 网格独立性测试结果

Table 1. Grid independence test results

参数	网格 (N₁×N₂)	质量流量/(kg·s^-1)	相对变化量/%
N₁变化 N₂=120	850×120	0.053 020 379
	900×120	0.053 027 642	0.013 7
	950×120	0.053 028 746	0.002 1
N₁ = 900 N₂变化	900×100	0.053 035 973
	900×120	0.053 027 642	0.015 7
	900×140	0.053 026 096	0.002 9

下载: 导出CSV

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