机载火焰抑制器流通性能研究

Study on Flow Performance of Airboard Flame Arresters

受限于适航认证工作的相关要求及我国航空技术相对落后的现状,国产机载火焰抑制器的研制开发起步较晚。通过对机载火焰抑制器压力降产生的原因进行分析,提出一种适合计算机载火焰抑制器压力降的方法,在与实验结果对比并验证该方法正确性的基础上,根据某型机载火焰抑制器技术要求,分析在空气流动和燃油溢流情况下不同特征尺寸阻火单元的压力降,并探讨各个因素对机载火焰抑制器压力降的影响。结果表明:本文关于机载火焰抑制器流通性能的研究可为其工程设计、计算和选择提供有益的参考。

In our country,as the airworthiness certification and aviation technology are lagging far behind,the development of domestic airborne flame arrester has just been included into the agenda.Hence,based on the analysis of the reason of the pressure drop of the airborne flame arresters,a method suitable for calculating the pressure drop of the airborne flame arresters is proposed.Based on the comparison with the experimental results and the verification of the correctness of the method,according to arresters technical requirements,the pressure drop of flame arrestor element with different characteristic dimension under air flow and fuel overflow is analyzed,and the influence of various factors on the pressure drop of airborne flame arresters is discussed.The results indicate that the study of the flow performance of the airborne flame arresters can provide useful reference for its engineering design,calculation and selection.