水深对烟火药水下燃烧特性的影响

Influence of water depths on combustion characteristics for underwater combustion of pyrotechnic composition

为探讨水深对烟火药燃烧特性的影响,采用数值计算的方法,从燃烧理论与流体动力学的角度出发,研究了不同燃烧深度时烟火药水下燃烧的特性.结果表明:在其他条件不变的情况下,随着燃烧深度的增加,燃烧室内的达到平衡所需的压力越大,喷口气泡的膨胀速度、气泡体积变化的加速度以及声压级都随之减少.

In order to discuss the eftbct of water depths on focusing on the combustion theory and the fluid dynamic comousnon cnaractensucs oi pyrotectmlc t：ompositon, characteristics, this paper investigated the combustion characteristics of pyrotechnic composition at different water depths with numerical calculation method. The results show that the water depth strongly affects the pressure in the combustion chamber and the dynamic behaviors of the bubble. With the water depth increases, the pressure in the combustion chamber increases, but the volume expanding velocity of the bubble, its acceleration and the sound pressure level decrease.