Numerical Analysis on Launch Property of Rarefaction Wave Gun

The launch property of the rarefaction wave gun and some influences of different factors on the launch property were studied. The two-phase flow interior ballistic model was established based on the launch mechanism of the rarefaction wave gun. The Mac-Cormack difference scheme was used in numerical calculations. Compared with the interior ballistic process of a closed chamber gun with the same caliber, the launch property was discussed in detail, and the influence of the different factors including loading conditions, venting time and structural parameters on the emission property was obtained.