Study on aerodynamic characteristics of flying wing knapsack inlet duct

Abstract

Abstract Based on the extended shape of the existing flying wing standard model with small aspect ratio, this paper studies the flow field characteristics around the model at different angles of attack and the flow field characteristics of the knapsack dual release inlet when the Mach number is equal to 1.8. The pressure coefficient distribution, velocity distribution and eddy characteristics of typical states are illustrated. The results show that the lip of the knapsack inlet has a significant effect on the flow characteristics of the back and abdomen of the model. After passing through the inlet lip and the S-shaped bend in the front section, the internal pressure distribution of the inlet is relatively uniform, there are obvious vortices in the inlet, the core flow near the tail nozzle flows smoothly, and the strong vortices are only near the wall.