| Citation: | ZHANG Qunfeng, YAN Panpan, LI Junet al. Comparison between external store separation and buried store separation of fighter[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(6): 1085-1097. doi: 10.13700/j.bh.1001-5965.2016.0497(in Chinese)
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To analyze the difference between external store separation and buried store separation, several separation cases were simulated using the same missile under the conditions of both subsonic and supersonic inflow. Improved delayed detached eddy simulation (IDDES) method based on Menter SST turbulence model and overset mesh method were employed. Different trajectories of missile under different separation conditions were obtained. The results show that under both subsonic and supersonic inflow conditions, the buried missile is impacted by the strong unsteady flow field inside the cavity and shear layer at the cavity lip. It gives the missile big upward force moment which leads to obvious attitude angle variation. Compared with external store separation, the quality of buried store separation is much worse. If the missile is given a downward angular velocity and goes through the shear layer in pitch down angle, the side effects caused by shear layer can be substantially reduced. By using this launching method, the buried store separation quality is improved apparently.
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