燃油箱耗氧惰化与中空膜惰化的数值模拟及比较

王苏明; 冯诗愚; 李宗祺; 彭孝天; 刘卫华

doi:10.13700/j.bh.1001-5965.2019.0332

燃油箱耗氧惰化与中空膜惰化的数值模拟及比较

doi: 10.13700/j.bh.1001-5965.2019.0332

南京航空航天大学航空学院飞行器环境控制与生命保障工业和信息化部重点实验室, 南京 210016

基金项目:

南京航空航天大学研究生创新基地（实验室）开放基金 kfjj20180101

江苏高校优势学科建设工程

国家自然科学基金 U1933121

详细信息

作者简介:
王苏明男, 硕士研究生。主要研究方向:飞行器燃油系统

冯诗愚男, 博士, 副教授。主要研究方向:飞行器环境控制和燃油系统

通讯作者:
冯诗愚, E-mail:shiyuf@nuaa.edu.cn

中图分类号: V228
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出版历程
- 收稿日期: 2019-06-25
- 录用日期: 2019-08-30
- 网络出版日期: 2020-05-20

Numerical simulation and comparison of oxygen consumption inerting and hollow membrane inerting in fuel tank

Key Laboratory of Aircraft Environmental Control and Life Support, MITT, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Funds:

Open Fund of Graduate Innovation Base (Laboratory) of Nanjing University of Aeronautics and Astronautics kfjj20180101

The Priority Academic Program Development of Jiangsu Higher Education Institutions

National Natural Science Foundation of China U1933121

More Information

Corresponding author: FENG Shiyu, E-mail:shiyuf@nuaa.edu.cn

摘要

摘要:
针对耗氧型惰化系统燃油箱上部空间氧气体积分数随时间变化规律的问题，对耗氧型惰化系统的反应过程建立了数学模型，并通过CFD方法对机载绿色惰化气体产生系统（GOBIGGS）系统和机载惰化气体产生系统（OBIGGS）的惰化过程进行了模拟仿真，并与实验数据进行对比，验证了仿真结果的准确性。研究结果表明，当耗氧型惰化系统抽吸气的体积流量与中空膜惰化产生的富氮气体（NEA）体积流量相同时，耗氧型惰化系统不仅惰化时间短，而且能将燃油箱的O₂摩尔分数降至更低。同时耗氧型惰化系统的惰化效果与相同体积流量下NEA0（100%N₂）的中空膜惰化效果相近。另外，耗氧型惰化系统使燃油箱气相空间上部O₂摩尔分数大于下部O₂摩尔分数，中空膜惰化则相反。
- 燃油箱 /
- 惰化 /
- 数值模拟 /
- O₂摩尔分数 /
- 气相空间
Abstract:
To solve the problem of oxygen mole fraction changing with time in the upper space of oil tank of oxygen consuming inerting system. A mathematical model was established for the reaction process of the Green On-Board Inert Gas Generation System (GOBIGGS), and the inerting process of the GOBIGGS and the On-Board Inert Gas Generation System (OBIGGS) was simulated by CFD method. The simulation results were compared with the experimental data, which verifies the accuracy of the simulation results. The research results show that, when the flow rate of the exhaust gas from the fuel tank in the GOBIGGS is identical with that of the Nitrogen Enriched Air (NEA) in the OBIGGS, GOBIGGS not only has shorter inerting time than OBIGGS, but also reduces the oxygen mole fraction of the fuel tank to a lower level. The inerting effect of the GOBIGGS is similar to that of the OBIGGS of NEA0 (100%N₂) under the same flow rate. GOBIGGS makes the upper oxygen mole fraction greater than the lower oxygen mole fraction in the gas phase space of the fuel tank, while OBIGGS is the opposite.
- fuel tank /
- inerting /
- numerical simulation /
- oxygen mole fraction /
- gas phase space

HTML全文

图 1 几何模型

Figure 1. Geometry model

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图 2 网格划分

Figure 2. Mesh generation

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图 3 机载绿色惰化气体产生系统原理图

Figure 3. Principle of GOBIGGS

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图 4 UDF计算流程图

Figure 4. Flowchart of UDF calculation

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图 5 数值模拟结果与文献[16]实验数据对比

Figure 5. Comparison of numerical simulation results with experimental data of Ref.[16]

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图 6 不同模型下O₂摩尔分数随时间变化关系比较

Figure 6. Comparison of oxygen mole fraction variation with time under different models

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图 7 GOBIGGS燃油箱入口O₂和CO₂质量分数随时间变化关系

Figure 7. Time-dependent oxygen and carbon dioxide mass fractin at fuel tank inlet of GOBIGGS

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图 8 不同体积流量、不同模型下O₂摩尔分数随时间变化关系比较

Figure 8. Comparison of oxygen mole fraction variation with time under different volume flow rates and different models

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图 9 不同模型的O₂摩尔分数分布云图

Figure 9. Oxygen mole fraction distribution contours of different models

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