Mg4Al3/Al含量对烟火药水下燃烧声辐射特性的影响

Effect of Mg4Al3/Al Content on Acoustic Radiation Characteristics of Pyrotechnic Composition Underwater Combustion

为了探究燃烧反应的放热量对烟火药在水下燃烧的声辐射性能的影响,在烟火药中可燃剂质量分数一定的条件下,将镁铝合金粉(Mg4Al3)和铝粉(Al)比例按100∶0、80∶20、60∶40、50∶50、40∶60、20∶80、0∶100的质量梯度设计配方,研究烟火药水下燃烧声辐射特性的影响规律。结果表明,在烟火药水下燃烧过程中,随着体系中Al含量从0增至100%,烟火药燃烧放出的热量增大,水中燃烧产生的宽频带声压级数值从156.59d B增至162.93d B。

In order to exploring the effect of heat releasing on acoustic radiation of pyrotechnics in underwater combustion,the experiment of different proportion of magnesium-aluminium alloy powder(Mg4Al3)and aluminium powder(Al)in a certain pyrotechnic composition was carried out,with the aid of underwater acoustic devices.Results show that with the increase of Al content in the pyrotechnic composition from 0 to 100%,the heat releasing increases,which enhances acoustic sound pressure level from 156.59 dB to 162.93 dB.