Abstract Unsteady booster separation process at different separation angles of attack is studied by using numerical method in this paper. Separation trajectories and attitudes of booster versus time are given, and separation analyses are conducted based on unsteady aerodynamic forces and flow structures. The study shows that a proper large angle of attack must be chosen to achieve fast and safe separation. Besides, the absolute value of negative acceleration of booster is larger than that of upper stage, which is the foundation of successful separation. In actual engineering application, the reliability of separation can be improved by increasing a large transition slope or applying an initial reverse force. The results in this paper are valuable to choose separation condition and evaluate separation safety of the tandem boosterupper stage of surfacetoair missile.
Received: 07 December 2018
Published: 08 January 2020
2019, Vol. 2 
