某大口径火炮两相流内弹道模拟

为了掌握大口径低膛压火炮初速或然误差的影响因素,建立了某大口径火炮两相流内弹道模型并完成了数值模拟。通过模拟装药分布、弹丸挤进过程、点火过程对火炮初速的影响,了解各种装药因素对火炮初速或然误差的影响程度。所得结果为进一步优化装药结构,提高初速稳定性提供参考。

Rules Governing Pressure Distribution for a Traveling Charge Under the Condition of Lagrange Hypothesis

Aim To study the rules governing pressure distribution of traveling charge under the condition of Lagrange hypothesis. Methods\ The study is based on the laws of conservation of momentum and energy. Results\ The gas flow velocity distribution formula at the back of a projectile and the momentum equation of a traveling charge are deduced, and rules governing their pressure distribution under the Lagrange hypothesis conditions are established. The pressure distribution of a traveling charge is compared with that of a conventional charge. Conclusion\ The pressure distribution in the bore of a traveling charge can be accurately predicted. A parabolic pressure distribution type is revealed.