多隔舱燃油箱惰化流场的数值模拟与分析

张声奇; 王学德; 王志伟; 刘卫华; 王小平

多隔舱燃油箱惰化流场的数值模拟与分析

1.
南京理工大学能源与动力工程学院, 南京 210094
2.
南京航空航天大学航空宇航学院, 南京 210016
3.
南京机电液压工程研究中心, 南京 211100

基金项目: 南京理工大学紫金之星资助计划; 教育部博士点基金(20093219120031); 南京理工大学自主科研资助(2011YBXM111)

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出版历程
- 收稿日期: 2012-05-10
- 刊出日期: 2013-04-28

Numerical simulation and analysis of nitrogen-enriched air flow in multi-bay fuel tank

1.
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2.
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
3.
Nanjing Engineering Institute of Aircraft System, Nanjing 211100, China

摘要

摘要: 根据多隔舱燃油箱的特点,建立了适用于多隔舱燃油箱惰化流场的数值模拟方法.将数值模拟结果与工程模型结果及国外文献中的实验数据进行了对比,验证了该方法的正确性.通过对各个隔舱内氧气体积分数分布的分析发现,惰化过程中,各个隔舱内的氧气体积分数趋于均匀,流出某隔舱的气体的氧气体积分数近似等于该隔舱内的平均氧气体积分数.将数值模拟得到的两种流通方式下隔舱间气体体积流量分配情况与隔舱间流通面积比进行对比发现,当通气口相对于富氮气体进口对称布置时隔舱间体积流量能够近似按照面积比分配,而不对称布置时分配情况比较复杂,不能够简单地按照面积比确定.
- 多隔舱燃油箱 /
- 惰化 /
- 富氮气体(NEA) /
- 数值模拟 /
- 氧气体积分数 /
- 体积流量
Abstract: According to the characteristic of multi-bay fuel tank,a numerical simulation method for nitrogen-enriched air (NEA) flow in multi-bay fuel tank was developed.Firstly,the correctness of this method was verified by comparing the inerting results from numerical simulation with the results of the engineering model and the test data from foreign literatures.Secondly,after analyzing the oxygen volume fraction in individual bay of the inerting process,it was found that the oxygen volume fraction distribution in individual bay tended to be even and the outflow oxygen volume fraction of one bay was approximately equal to the average oxygen volume fraction of that bay.Lastly,the simulated flow rates were compared with the cross-section flow areas between different bays.It is found that if the vents are placed symmetrically to the inlet of NEA,the flow rates can be weighted based on the cross-section flow areas; while if the vents are placed asymmetrically to the inlet of NEA,the flow pattern would be relatively complex.
- multi-bay fuel tank /
- inerting /
- nitrogen-enriched air(NEA) /
- numerical simulation /
- oxygen volume fraction /
- volume flow rate

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参考文献(15)

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