耗氧型惰化系统反应器性能理论

谢辉辉; 冯诗愚; 彭孝天; 潘俊; 王洋洋

doi:10.13700/j.bh.1001-5965.2019.0117

耗氧型惰化系统反应器性能理论

doi: 10.13700/j.bh.1001-5965.2019.0117

1.
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
2.
中国航空工业集团有限公司南京机电液压工程研究中心航空机电系统综合航空科技重点实验室, 南京 211106

基金项目:

中央高校基本科研业务费专项资金

江苏省研究生科研与实践创新计划 KYCX19_0198

江苏高校优势学科建设工程

详细信息

作者简介:
谢辉辉男, 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: V224⁺.2
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- 被引次数: 0
出版历程
- 收稿日期: 2019-03-20
- 录用日期: 2019-05-18
- 网络出版日期: 2019-11-20

Theoretical of reactor performance in oxygen consumption based inerting system

1.
Key Laboratory of Aircraft Environmental Control and Life Support of Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Aviation Key Laboratory of Science and Technology on Aero-Electromechanical System Integration, Nanjing Engineering Institute of Aircraft Systems, Aviation Industry Corporation of China, Nanjing 211106, China

Funds:

the Fundamental Research Funds for the Central Universities

Postgraduate Research & Practice Innovation Program of Jiangsu Province KYCX19_0198

Priority Academic Program Development of Jiansu Higher Education Institutions

More Information

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

摘要

摘要:
为了研究耗氧型燃油惰化系统中反应器的工作特性，在Fluent 17.0软件多孔介质模型基础上以用户自定义变量（UDS）形式添加固相能量方程来建立气-固两相耦合传热的两温度反应器模型，以大庆RP-3燃油为对象并通过实验测试了其反应动力学方程，然后以用户自定义函数（UDF）源项的形式添加化学反应，对反应器进行了仿真。研究了不同工况对反应器惰化效率的影响，以及反应器在惰化过程中的内部温度及RP-3浓度变化特性。结果显示：反应物浓度对转化率的影响与氧浓度饱和值有关系，在没有额外冷却的情况下反应器会飞温，化学反应主要发生在反应器的后半段，且靠近反应器轴线处。因此在未来设计反应器时，应当考虑额外冷却措施以防止飞温，使催化床温度均匀分布来提高反应器工作效率。
- 催化燃烧 /
- 反应器 /
- 燃油箱 /
- 惰化系统 /
- RP-3
Abstract:
In order to research the working performance of the reactor in oxygen consumption based fuel tank inerting system, the solid phase energy equation was added in the form of UDS to establish the two temperatures reactor model with gas-solid two-phase coupled heat transfer on the basis of Fluent 17.0 software porous medium model, the reaction kinetic equation was tested experimentally with Daqing RP-3 fuel as the object, and the chemical reaction was added in the form of UDF source terms to simulate the reactor. This paper studied the effects of different operating conditions on the inerting efficiency of the reactor, as well as the internal temperature of the reactor in inerting process and variation characteristics of RP-3 concentration. The results show that the effect of reactant concentration on conversion is related to the saturation value of oxygen concentration; the absence of additional cooling will lead to temperature run-away, and the chemical reaction mainly occurs in the second half section of the reactor and is close to the reactor axis. Therefore, when designing the reactor in the future, additional cooling measures should be considered to prevent the temperature run-away and make the temperature of the catalytic bed evenly distributed to improve the work efficiency of the reactor.
- catalytic combustion /
- reactor /
- fuel tank /
- inerting system /
- RP-3

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图 1 催化剂性能测试实验

Figure 1. Catalyst performance test experiment

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图 2 不同氧气浓度下反应速率随温度变化

Figure 2. Variation of reaction rate with temperature at different oxygen concentrations

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图 3 不同温度下反应速率随RP-3浓度变化

Figure 3. Variation of reaction rate with RP-3 concentration at different temperatures

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图 4 催化反应器结构

Figure 4. Catalytic reactor structure

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图 5 网格数量与反应器压降关系

Figure 5. Relationship between number of grids and reactor pressure drop

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图 6 RP-3转化率与反应物浓度关系

Figure 6. Relationship between RP-3 conversion rate and reactant concentration

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图 7 不同气流速度下RP-3转化率与温度关系

Figure 7. RP-3 conversion rate versus temperature at different gas velocities

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图 8 t=80s时刻反应器内气体温度云图

Figure 8. Gas temperature contour in reactor at t=80s

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图 9 t=80s时刻反应器内RP-3浓度云图

Figure 9. RP-3 concentration contour in reactor at t=80s

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图 10 不同时刻催化床轴线处温度分布

Figure 10. Temperature distribution at axis of catalytic bed at different moments

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图 11 不同时刻反应器轴线处RP-3浓度分布

Figure 11. RP-3 concentration distribution at reactor axis at different moments

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图 12 不同截面处气相温度随时间变化

Figure 12. Variation of gas phase temperature at different cross-sections with time

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图 13 不同截面处RP-3平均浓度随时间变化

Figure 13. Variation of average concentration of RP-3 at different cross-sections with time

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图 14 t=80s时刻催化床不同轴向处RP-浓度

Figure 14. RP-3 concentration in different axial positions of catalytic bed at t=80s

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图 15 t=80s时刻催化床不同轴向处径向温度

Figure 15. Radial temperature in different axial positions of catalytic bed at t=80s

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表 1 反应器催化床主要参数

Table 1. Main parameters of reactor catalytic bed

参数	数值
比热容/(J·kg^-1·K^-1)	600
密度/(kg·m^-3)	2800
导热系数/(W·m^-1·K^-1)	0.16
直径/mm	3.5
孔隙率	0.38

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