子母弹抛撒机构均相流内弹道数值模拟

介绍了双燃烧室活塞式子母弹抛撒机构 ,利用均相流理论 ,建立了高压室均相流内弹道方程组 ,和低压室经典内弹道方程组 ,利用数值模拟得到了燃烧室的 p～ t曲线和子弹的抛撒速度 ,并对高压室内的压力波进行了分析 。

基于应变测试系统的二级轻气炮活塞运动测量

为了研究活塞在二级轻气炮泵管中的运动过程,利用应变测量技术对活塞运动规律进行测量研究。通过对57 mm/10 mm二级轻气炮泵管外壁按一定距离布设应变片测点,对轻气炮发射过程中的活塞运动导致泵管环向应变进行监视测量,直接得到典型实验条件下活塞运动过程中的内弹道压力变化,并通过推导得到活塞运动时程及位移与弹底压力的关系。结果表明:实验得到的活塞速度、位移之间关系与相关理论计算结果吻合良好,验证了该方法研究活塞在轻气炮内弹道运动规律的可行性,为优化轻气炮内弹道程序参数和提高二级轻气炮的发射性能提供实验支持。

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.