基于粒子法的柔性气缸导弹弹射数值仿真

The working mechanism of a flexible cylinder ejection system and its ejection mode are studied to further improve the controllability, concealment, repeatability and lightweight of cold launch equipment. Corpuscular method is used to calculate the gas jet inside the flexible cylinder, and simulate and calculate the fluid-structure interaction of the flexible cylinder combined with finite element method. The experimental results and the numerically simulated results of the flexible cylinder ejection system are compared to verify the correctness and reliability of the numerical calculation method. For a 16-ton missile, the multi-nozzle ejection and ejection medium of the flexible cylinder ejection system were explored by changing the calculation parameters. It is found that the missile overload has two peaks and is relatively smooth during the work of the flexible cylinder ejection system. The ejection kinetic energy of the missile is basically unchanged and the missile overload is optimized by adjusting the starting time of each nozzle. In the flexible cylinder ejection system using supercritical carbon dioxide, instead of high-pressure nitrogen or high-pressure air, as the ejection medium, the ejection kinetic energy obtained by the missile is reduced by about 41.1%, and the ejection time of the system is extended by about 17.1%.