飞机燃油管路安装间隙闪电击穿电压研究  

Study on the Lightning Breakdown Voltage of Small Gaps in Aircraft Fuel Pipes Installation

作　　者：姜亮 刘春阳 姚永杰 JIANG Liang;LIU Chunyang;YAO Yongjie(COMAC Shanghai Aircraft Design&Research Institute,Shanghai 201210,China;CAAC Shanghai Airworthiness Certification Center,Shanghai 200335,China;Xi’an Airborne Electromagnetic Technology Co.Ltd,Xi’an 710077,China)

机构地区：[1]中国商用飞机有限责任公司上海飞机设计研究院,上海201210 [2]中国民用航空上海航空器适航审定中心,上海200335 [3]西安爱邦电磁技术有限责任公司,西安710077

出　　处：《空军工程大学学报》2024年第4期28-32,共5页Journal of Air Force Engineering University

基　　金：国家重大科技专项(大型飞机专项)。

摘　　要：闪电击穿电压是飞机遭遇闪电雷击时会否在燃油箱内产生电火花的重要评判指标。为研究飞机燃油箱内典型燃油管路安装间隙下的闪电击穿电压,搭建了闪电击穿电压测试台架,并采用可调冲击电压发生器模拟出符合标准《SAE ARP5412B》要求的闪电电压波形。实验发现:安装间隙为3 mm时,实验室环境下测得的最小临界耐受击穿电压值为9.0 kV,飞机燃油箱内燃油管路周围部件的种类和燃油管路的安装形式对闪电击穿电压的影响不大,燃油管路的管径大小以及管路表面的油漆层对闪电击穿电压的影响可忽略不计,保持3 mm安装间隙不变,在部件表面涂覆1 mm厚密封胶,耐受击穿电压值从9.9 kV跃增至22.5 kV,安装间隙击穿所需的电压幅值大幅提高。实验结果表明:在燃油管路表面涂覆密封胶是减缓小间隙处发生闪电击穿风险的一种有效措施,可为飞机燃油管路安装间距选取和闪电防护设计提供参考和依据。Lightning breakdown voltage is a significant parameter in judging whether lightning spark is enabled to generate in the fuel tank when an aircraft is struck by lightning.To investigate the lightning breakdown voltage of small gaps in aircraft fuel pipes installation,a test setup is built,and an adjustable impulse voltage generator is adopted to generate the lightning voltage waveform in accordance to the standard SAE ARP5412B.The test results show that the minimum value of critical withstood breakdown voltage measured in the laboratory environment is 9.0 kV at the installation gap of 3 mm.The types of components around the fuel pipes in fuel tank and the installation forms of the fuel pipes are almost not affected by the lightning breakdown voltage of the installation gap.The effects of the lightning breakdown voltage on the fuel pipes in diameter and on the surface of fuel pipes paint layer are negligible.The installation gap of 3 mm should be in good keep.The withstood breakdown voltage value increases from 9.9 kV to 22.5 kV by applying 1 mm thick sealant on the component surface,showing that the voltage amplitude required for gap lightning breakdown is greatly increased.The researches indicate that coating sealant on the surface of fuel pipes is an effective measure to reduce the risk of lightning breakdown in small gaps.The tests results and research conclusions of this paper are available for reference and basis.

关 键 词：飞机燃油箱 燃油管路 闪电防护 击穿电压 

分 类 号：V216[航空宇航科学与技术—航空宇航推进理论与工程]