A tandem compound parachute system composed of a rotating parachute and around parachute is designed. Using fluid-structure interaction method, the inflationprocess of the parachute system is simulated. The canopy shape change, thetime-historical curves of spinning rate and opening load are obtained. The tower testis conducted to verify the simulation results, and the effects of structure parameterson the system performance are analyzed. The trajectory characteristics of the tandemcompound parachute-submunition system are simulated by RecurDyn. The resultsshow that the tandem compound parachute system can inflate successfully with thecondition of low flow velocity and come to rotate. The tandem compound parachutesystem can offer steady spinning rate and falling velocity for smart submunition.Decreasing the canopy area of the rotating parachute can increase the deceleratingand spinning efficiency of the parachute system, but the canopy with too small areawill make the parachute cords twisted.
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