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为了更加精确地描述制导炮弹膛内多相燃烧过程,保证其发射安全性,基于高阶近似黎曼解模型,构造了某制导炮弹双一维内弹道两相流高精度近似黎曼离散格式,对膛内高温高压多相燃烧过程进行了相关数值模拟。数值仿真结果与实验结果符合较好,数值结果准确地描述了制导炮弹膛内复杂多相燃烧过程,完整地呈现了高温高压变截面条件下的膛内复杂波系发展过程,为后续研究不同装药条件对制导炮弹的内弹道特性及发射安全性的影响奠定了理论基础。
In order to describe the multiphase combustion process in a guided projectile more precisely and ensure its launch safety, a high precision approximation Riemannian discrete scheme of a two-dimensional two-phase flow in a guided projectile is constructed based on the high-order approximation Riemann solution model. The numerical simulation of multiphase combustion process in high temperature and high pressure chamber was carried out. The numerical simulation results agree well with the experimental results. The numerical results accurately describe the complex multiphase combustion process in the guided projectile shell, and complete the development process of the complex wave system in the muzzle under the conditions of high temperature and high pressure varying cross section. The condition of medicine has laid a theoretical foundation for the effect of guidance ballistic on the internal ballistic characteristics and launching safety.