Abstract:
The deceleration of the entry vehicle and precision landing are some of the key challenges during the Mars entry, decent and landing (EDL) stage. The aerodynamic characteristics and entry performances of three typical lifting Mars vehicles were analyzed, including Mars Science Laboratory, SpaceX's Dragon capsule and Orion Multi-Purpose Crew Vehicle. The entry trajectories were analyzed with trajectory simulation program. In the present work, the aerodynamic characteristics and entry performances of three typical lifting Mars vehicles, and the impact of geometry configurations on the performances of Mars lifting entry vehicle were discussed. Results showed that sphere-cone heatshield will produce larger drag and more severe aerodynamic heat. Under the same conditions, there is not much difference between maximum load factor and opening height and the Dragon capsule has the lowest opening dynamic pressure, which is beneficial to decrease the opening load. The research results can provide valuable reference for aerodynamic design of future Mars entry vehicles.