机载火焰抑制器流阻特性研究

Research on the Flow Resistance Performance of Airborne Flame Arrestor

通过试验和数值计算方法研究了六边形阻火单元结构火焰抑制器的流阻特性,分析了火焰抑制器结构参数对其流阻特性的影响。研究发现,随着六边形通道边长的减小,火焰抑制器的流阻急剧增大;随着六边形通道壁厚的增加,火焰抑制器的流阻呈增大趋势;阻火单元长度越长,火焰抑制器流阻越大。因此,在火焰抑制器设计过程中,在满足阻火、耐烧及结构强度等设计要求下,应选取较大的六边形通道边长、较小的六边形通道壁厚和阻火单元长度。

The flow performance of airborne flame arrestors was studied by experimental and numerical methods, and the influence of the design parameters of flame arrestors on the flow performance was analyzed. It is found that the flow resistance of the flame arrestor increases with the decrease of the side length of hexagonal channel, the increase of the wall thickness of hexagonal channel and the increase of the length of flame arrestor element. Therefore, in the process of flame arrestor design, in order to meet the quenching performance and structural strengh, it should select the larger hexagonal channel length, the smaller hexagonal channel wall thickness and the smaller flame arrestor element length should be selected.