When the convergent hypervelocity launcher is applied to measure the equation of states,the second stage flyer are required to have well impact planarity and high impact velocity.Taking this into consideration,our paralleled Eulerian code HVL-MFPPM is employed to investigate the hypervelocity launcher.According to the simulation results,the structure and dimensions of the first stage flyer are optimized.Finally,the best scheme(the diameter of the first stage flyer is 20 mm,and its thickness is1.8mm)is obtai...