飞机燃油系统闪电试验可燃气体配比研究  

Study on Proportions of Flammable Gas in Lightning Test of Aircraft Fuel System

作　　者：姜亮 刘春阳 姚永杰 熊秀 JIANG Liang;LIU Chunyang;YAO Yongjie;XIONG Xiu(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 Shaanxi 710117,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,陕西西安710077

出　　处：《海军航空大学学报》2024年第1期167-172,共6页Journal of Naval Aviation University

摘　　要：飞机燃油系统闪电试验中,可燃气体混合配比体积分数的轻微变化对气体的点燃能量和点燃概率有重要的影响。采用混合配比体积分数不恰当的可燃气体可能会导致闪电试验欠考核或过严考核,进而影响对闪电防护设计有效性的准确评估。采用高精度的动态气体配比调控系统搭建了可燃气体点燃试验验证台架,通过试验对不同可燃气体配比体积分数下的最小点燃能量及相关点燃影响因素进行了研究和分析。研究表明:采用5.0%氢气配比体积分数的可燃气体可检出200μJ及以上能量的全部点火源,同时可避免闪电试验被过度考核,推荐进行优先选配;随着氢气配比体积分数的增大,可燃气体点燃所需的点燃能量逐渐降低;氢气配比体积分数越高,燃油系统闪电试验被过度考核的程度就越大;鉴于可燃气体燃爆冲击的安全影响,不推荐燃油系统闪电试验采用6.5%及以上氢气配比体积分数的可燃气体。试验数据及研究结论可为飞机燃油系统闪电防护设计及闪电试验提供参考和指导。In lightning tests of aircraft fuel system,the ignition energy and ignition probability of flammable gas are greatly affected by a slight change in the mixture proportions of flammable gas.Using flammable gas with improper mixture proportions may lead to under-assessment or over-assessment of the lightning test,which will influence the accurate evaluation of the effectiveness of lightning protection design.A high-precision and dynamical gas ratio control system is used to establish the flammable gas ignition test verification system,and the minimum ignition energy and related influence factors of ignition under different proportions of flammable gas are studied and analyzed by experiments.The results show that,using the flammable gas with a 5.0% hydrogen concentration,can detect all ignition sources with energy of 200μJ and above,and can avoid over-assessment of lightning test,so it is recommended to prioritize the selection.With the increase of hydrogen proportion,the ignition energy required for ignition of flammable gas decreases gradually.The higher the hydrogen proportion concentration is,the more the lightning test of fuel system is over-assessed.In consideration of the safety impact of flammable gas explosion shock,it is not recommended to use flammable gas with a hydrogen proportion of 6.5%or above in fuel system lightning test.The experimental data and analysis conclusions can provide reference and guidance for lightning protection design and lightning test implementation of aircraft fuel system.

关 键 词：飞机 燃油系统 闪电 可燃气体 

分 类 号：V216[航空宇航科学与技术—航空宇航推进理论与工程]