Numerical analysis of fragile back cover opening process coupling with jet flow

The motion process of fragile back cover interacts with the flow field of gas jet. The dynamic mesh technology based on smoothing method and remeshing method is used to study the opening process of back cover, The opening process is simulated by coupling the motion process of back cover with the gas jet flow field. The initial shock wave is observed, and the pressure curves of monitoring points are plotted. The effect of jet flow on the motion of cover debris is analyzed. Compared to the results of uncoupled case, the results of coupled case are closer to the experimental data. The driving moment is getting small with the increase in rotation angle of cover debris. The rotation speed rises fast at first and then goes down slowly.