火炮发射与控制学报

针对大口径火炮含包覆药的混合装药内弹道问题，建立了含包覆药的混合装药二维两相流内弹道数学模型，并利用该模型开展了某大口径火炮含包覆药的混合装药内弹道过程以及单一装药内弹道过程的对比研究，并探讨了包覆发射药质量占比和包覆层质量分数对内弹道性能的影响。结果表明，与未包覆、单一装药内弹道性能相比，在保证相同弹丸初速条件下，含包覆药的混合装药能够将最大膛压由336.9 MPa下降至318.6 MPa。当包覆发射药质量占比由0增大至30%和70%时，炮口动能分别低了7%和17%,而最大膛压分别降低了18%和39%。当包覆层质量分数占比由2.5%增大至7.5%和12.5%时，炮口动能分别低了3%和5%,而最大膛压分别降低了7%和14%。

Aiming at solving the interior ballistic problem of a large caliber cannon which used mixed charge with coated propellant, a two-dimensional two-phase flow interior ballistic model of mixed charge with coated propellant was established. Based on this model, the interior ballistic processes of mixed charge with coated propellant were compared with those of uncoated single charge, and the influe-nce of the mass ratio of coated charge and the coating layer mass fraction on interior ballistics perfor-mance was investigated. The results showed that compared with the interior ballistics performance of uncoated single charge, the the coated mixed charge could reduce the maximum chamber pressure from 336.9 MPa into 318.6 MPa at the same muzzle velocity. When the mass ratio of coated charge was increased from 0 to 30% and 70%, the muzzle energy was decreased by 7% and 17% respectively, and the maximum chamber pressure was reduced by 18% and 39% respectively. When the coating layer mass fraction was increased from 2.5% to 7.5% and 12.5%, the muzzle energy was reduced by 3% and 5% respectively, and the maximum chamber pressure was reduced by 7% and 14% respectively.