Study on the applicability of mixture gas in flame suppression test of aircraft flame arrestor

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2024, Vol.47 No.5: 620-627

DOI: 10.3969/j.issn.1003-5060.2024.05.007

Authors

HU Jing $ ^{1} $, LIU Yong $ ^{1} $, YANG Guokai $ ^{2,3,4} $, LI Zhibao $ ^{2,3,4} $, SHU Weiwei $ ^{2,3,4} $, SI Xiaoliang $ ^{2,3,4} $

(1. School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China; 2. Anhui Province Key Laboratory of Aircraft Lightning Protection, Hefei 230031, China; 3. Aviation Key Laboratory of Science and Technology on High Intensity Electromagnetic Environment Protection, Hefei 230031, China; 4. Hefei Hangtai Electrophysics Technology Co., Ltd., Hefei 230031, China)

Abstract and Keywords

Abstract: The flame propagation characteristics of flame arrestor for typical civil aircraft fuel tank vent were studied. According to the combustion and explosion scheme of mixture gas of $ H_{2} $, $ O_{2} $ and Ar stipulated in SAE ARP5416, and referring to the test method under ISO 16852 standard, the combustion and explosion test platform was built, and a series of tests were carried out under the conditions of different $ H_{2} $ concentration ratios, internal apertures and lengths of flame suppression core. The characteristics of the flame arrestor were compared with those of current commercial flame arrestors. The phenomenon and law of deflagration flame arrestors were also obtained by using high-speed camera and the simulation was carried out. The results show that the flame propagation test of aircraft flame arrestor using $ H_{2} $ with a concentration ratio of 5.0%-10.0% has a very low success rate of flame suppression, and the influence rule of increasing $ H_{2} $ concentration on the flame propagation velocity is obtained. The results show that the difference between $ H_{2} $ and aviation kerosene vapor is the key factor in the failure of flame suppression. The limitations of mixture gas in this test were explained. The test results can provide reference for the research on $ H_{2} $-type flame arrestors.

Keywords: aircraft flame arrestor; mixture gas; combustion and explosion process; flame suppression test; gas applicability

作者信息

胡静 $ ^{1} $，刘勇 $ ^{1} $，杨国凯 $ ^{2,3,4} $，李志宝 $ ^{2,3,4} $，束伟伟 $ ^{2,3,4} $，司晓亮 $ ^{2,3,4} $

（1. 中国民航大学航空工程学院，天津 300300；2. 安徽省飞机雷电防护省级重点实验室，安徽合肥 230031；3. 强电磁环境防护技术航空科技重点实验室，安徽合肥 230031；4. 合肥航太电物理技术有限公司，安徽合肥 230031）

摘要和关键词

摘要: 文章对典型民用飞机油箱通气口飞机火焰抑制器火焰传播特性开展试验研究。根据SAE ARP5416中规定的 $ H_{2} $、 $ O_{2} $、Ar 3种混合气体的燃爆方案，借鉴ISO 16852标准下的试验方法，自建燃爆试验台，并分别在不同 $ H_{2} $体积分数、阻火芯体内部孔径和芯体长度的情况下开展系列试验，并与现行商用阻火器特性进行对比，同时使用高速摄像机获得爆燃阻火现象及规律并开展仿真对比。试验结果表明，使用体积分数为5.0%～10.0%的 $ H_{2} $进行飞机火焰抑制器火焰传播试验时，试验阻火成功率极低，并得到 $ H_{2} $体积分数升高对火焰传播速度的影响规律。研究表明， $ H_{2} $与航空煤油蒸气的特性差异是阻火失效的关键因素。该文对此次试验的混合气体局限性进行分析，试验结果也为 $ H_{2} $类阻火器的研究提供一定的参考。

关键词: 飞机火焰抑制器；混合气体；燃爆过程；阻火测试；气体适用性

Funding

国家科技重大专项资助项目（J2019-VIII-0009-0170）

合肥工业大学学报(自然科学版)

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