Numerical simulation and experimental verification of gas pressure wave at the exit of launching tube

The introduction of the full paper outlines our research, which is explained in sections 1, and 2. Section 1 is entitled calculation method; subsection 1. 1 is entitled geometrical configuration and its mesh; subsection 1.2 is entitled boundary conditions and initial conditions; subsection 1.3 is entitled numerical simulation model; subsection 1.3. 1 is entitled gas-liquid two-phase flow model; subsection 1.3.2 is entitled k-ε turbulence model. Section 2 is entitled verification of calculation method; its core consists of: (1) we did pool experiments on the underwater launching of a model missile, during which we photographed the pulsant of a bubble with a high-speed camera and monitored the pressure wave at the exit of launching tube; (2) we compare our simulation results with experimental results; the comparison results indicate preliminarily that the formation, expansion and contraction of the bubble simulated with our method agree qualitatively with those obtained through experiments.