混合颗粒床中颗粒轨道模型及其数值模拟

以含粒状、管状火药的混合装药结构火炮为工程背景，建立离散的颗粒轨道模型。气相用欧拉法描述，颗粒相和管状药用拉格朗日方法描述。两相的相互作用反映在守恒方程的源项中。并用数值方法进行了求解，计算膛压和初速与实验有较好的一致性。

THE PARTICLE TRAJECTORY MODEL AND ITS SIMULATION IN COMPOSITE PARTICLE BEDS

On the basis of a gun with a composite charge structure including particle and tubular propellants, a particle trajectory model was established. The gas field was described by Eulerian system, whereas the propellant particles were described by the Lagrangian approach. The interaction between the two phases were expressed in the source terms. The numerical results are consistent with the experimental data.