Study On Fluid - Solid Coupling Simulation Of Large Caliber Rocket - Fired Emission

CoMpared with hot launch implemented in traditional rocket projectile, cold launch as exemplified by ejection launch is proof against high temperature jet flow and beneficial to improve storage conditions of rocket weapons, which meets the developmental trend of missile ahead, such as flexibility, celerity and invisibility. With the assistance of fluid-solid interaction theory, this thesis aims at studying the cold launch device which is based on compressed air ejection, centering on the studies of ejection of large-caliber rocket projectiles, such as the design and optimization of internal trajectory, analysis and optimization of the structure of ejection system, and the identification of the main factors affecting the efficiency of catapult.Before setting up a basic model of flow field and structure in Ansys Workbench, the carefully choosed finite element analysis software, this thesis has taken the tactical requirements of large-caliber rocket projectiles and current researches into consideration. And then this basic model is analyzed in terms of its viberation, meanwhile its simulation assumptions and conditions are testified, including the simulation accuracy, parameter setting, the influence of air resistance and friction condition. Then this thesis examines two questions based on the fluid-solid interaction coMparison model, the influences that energy and structural parameters have on the efficiency of compressed air ejection. According to these experiments, this thesis identifies the optimal model of compressed air ejection structure and flow field parameters.To conclude, as is showed by the analysis process, the author sincerely hopes that this thesis might generate some referential significances for designing internal trajectory of compressed air ejection and applying fluid -solid interaction theory to cold launch.