Supercritical carbon dioxide phase change launch is one of the current research hotspots in the field of weapon launch.In order to further expand the research on supercriti-cal gas gun launch,this paper establishes the overall plan of the supercritical phase change launch device based on high-pressure launch technology and the basic principles of gas guns,and fits the heat exchange process between supercritical carbon dioxide and gunpowder gas.A supercritical phase change gas gun launch model was established based on the thermody-namic equation and internal ballistic equation,with the target of projectile launch speed,to obtain the initial pressure change law.Based on Fluent,the changes in the flow field of su-percritical phase change launch were studied,and the changes in airflow velocity inside the phase change launch device were analyzed.The influence of initial pressure and projectile mass on the exit velocity of the projectile was obtained,as well as the changes in the sur-rounding fluid domain of the projectile at different motion times.Empirical formulas were summarized.The comparison with experimental results shows that the designed supercritical phase transition launch scheme meets the predetermined launch indicators of the projectile,and the fluid simulation model is reliable.
维普
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