Numerical Simulation Research of Loitering Munitions Aerodynamics

Aerodynamics of loitering munition is studied in this paper. The aerodynamic characteristics of loitering munition with non-circular body and body-airfoil-empennage combination are calculated numerically at Ma0.4 based on multi-griddings patching technology, in the range of angle of attack -4°-10°, and the analytical results were compared with those from wind tunnel experiments, they show a good consistency. Analysis of the results showed that the normal force generated by non-circular cross-section missile increases with the angle of attack. At α≥6°, normal force achieved by missile body can take up to 10% of the total lift. Together with the lifting surface, the loitering munitions can provide a better lift to drag ratio, an improved weapon range and a good longitudinal stability.