Influence of Model Scale on Wave Landing Characteristics of Seaplane

Using the numerical simulation method and based on the volume of fluid method and dynamic overlapping grid technology, the dynamic characteristics of the model scale and real scale seaplane landing on the wave surface are simulated. Through the analysis of the periodic operation response of seaplane landing on the water surface with waves of different scales, the laws of gravity center sinking, floating and pitching are compared. The results show that the characteristics of wave landing motion on the water surface with reduced scale and real scale are obviously different. The rear body touching the water and the front body touching the water of the reduced scale model constitute the restoring moment, which makes the motion of the aircraft show obvious periodicity. In the real aircraft model, Aerodynamic moment obviously participates in the process of aircraft pitching motion, which destroys the periodic behavior of rear body touching water and front body touching water, resulting in aperiodic pitching motion; The sinking and floating motion of the aircraft is involved by the pitching motion. They have the same motion law, but the sinking and floating motion lags slightly. The 1/10 scale model has the same conclusion as the real aircraft.