入口压力对天然气超声速液化特性的影响

边江; 曹学文; 杨文; 于洪喜; 尹鹏博

doi:10.11858/gywlxb.20170639

入口压力对天然气超声速液化特性的影响

doi: 10.11858/gywlxb.20170639

边江^1,,
曹学文^1,*, ,,
杨文²,
于洪喜³,
尹鹏博¹

1.
中国石油大学(华东)储运与建筑工程学院, 山东青岛 266580
2.
中国石化销售有限公司华南分公司, 广东广州 510620
3.
中国石化新疆煤制气外输管道有限责任公司湖广分公司, 湖南长沙 410016

基金项目:

国家重点研发计划专项 2016YFC0802301

国家自然科学基金 51274232

国家自然科学基金 51406240

山东省自然科学基金 ZR2014EEQ003

详细信息

作者简介:
边江(1992-), 男, 博士研究生, 主要从事天然气处理与加工技术研究.E-mail:bianjiang868@163.com

通讯作者:
曹学文(1966-), 男, 教授, 博士生导师, 主要从事天然气处理与加工、油气水多相流理论及应用、海底管道完整性管理等研究.E-mail:caoxw@upc.edu.cn

中图分类号: TE642
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出版历程
- 收稿日期: 2017-09-09
- 修回日期: 2017-10-25

Influence of Inlet Pressure on Supersonic Liquefaction of Natural Gas Mixtures

BIAN Jiang^1
,,
CAO Xuewen^{1,*
, ,},
YANG Wen²,
YU Hongxi³,
YIN Pengbo¹

1.
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China
2.
South China Branch, Sinopec Sales Co., Ltd., Guangzhou 510620, China
3.
Huguang Branch, Sinopec Xinjiang Coal Gas Pipeline Co., Ltd., Changsha 410016, China

摘要

摘要: 为研究入口压力对天然气混合物超声速液化特性的影响规律，建立了三维双组分天然气混合物超声速凝结流动数学模型，对Laval喷管内双组分混合物凝结流动进行了数值模拟，得出了沿Laval喷管轴向的参数分布，通过开展双可凝组分气体凝结相变实验，对比发现数值模拟与实验结果基本一致，说明了所建立的数学模型及计算方法的正确性。还研究了入口压力对甲烷-乙烷混合物超声速液化特性的影响，结果表明，保持Laval喷管入口温度及组成不变，增大入口压力，混合气体成核位置前移，成核率、平均液滴半径、液相质量分数均随之增大，即入口压力越大，混合气体在Laval喷管内越易发生凝结，在实际生产中可以通过调节入口压力来促进天然气的凝结，提高Laval喷管的液化效率。
- Laval喷管 /
- 甲烷-乙烷 /
- 入口压力 /
- 液化 /
- 成核
Abstract: In this paper, to find out about how the inlet pressure influences the supersonic liquefaction of natural gas mixtures, we established a three-dimensional mathematical model for the supersonic condensation flow of the methane-ethane mixture gas, obtained the axial parameters along the Laval nozzle, and conducted experiments to verify the gas condensate phase transition of double condensable components.It was found that the numerical simulation is in good agreement with the experimental results, thereby proving the mathematical model and the calculation method as correct.We also investigated the influences of the inlet pressure on the supersonic liquefaction of methane-ethane mixtures.The results indicate that, when the temperature and composition of the Laval nozzle inlet remain the same, the nucleation position of the mixed gas moves forward, the nucleation rate, the mean droplet radius and the liquid mass fraction all increase with the increase of the inlet pressure.The greater the inlet pressure, the more apt for the condensation of the gas mixture in the Laval nozzle to occur.In the actual production, the condensation of natural gas mixtures can be promoted by adjusting the inlet pressure, and the liquefaction efficiency of the Laval nozzle will be improved.
- Laval nozzle /
- methane-ethane /
- inlet pressure /
- liquefaction /
- nucleation

HTML全文

图 1 Laval喷管三维结构

Figure 1. Structure of Laval nozzle

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图 2 Laval喷管沿程压力分布数据对比

Figure 2. Comparison of pressure distribution data in Laval nozzle

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图 3 Laval喷管内气体压力分布

Figure 3. Gas pressure distribution in Laval nozzle

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图 4 Laval喷管内气体温度分布

Figure 4. Gas temperature distribution in Laval nozzle

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图 5 Laval喷管内成核率分布

Figure 5. Nucleation rate distribution in Laval nozzle

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图 6 Laval喷管内液滴半径分布

Figure 6. Droplet radius distribution in Laval nozzle

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图 7 Laval喷管内液滴生长率分布

Figure 7. Droplet growth rate distribution in Laval nozzle

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图 8 Laval喷管内液相质量分数分布

Figure 8. Liquid mass fraction distribution in Laval nozzle

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表 1 Laval喷管各部分参数

Table 1. Parameters of Laval nozzle

L₀/mm r₁/mm L₁/mm r_cr/mm L₂/mm r₂/mm

50.00 20.00 56.01 2.50 71.28 6.15

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