ANALYSIS OF SUCTION FORCE EFFECT ON DIFFERENT FUSELAGE SHAPE DURING THE WATER DITCHING

The process of aircraft forced water ditching involves complex nonlinear two-phase flow problems. Simple theoretical methods cannot obtain accurate results, and the experimental process is costly and has too many unstable factors. Therefore, the large eddy simulation method (LES) is used combined with the global dynamic grid strategy is used to numerically study the relevant phenomena in the aircraft water ditching problem. The main research object of this article is the suction force effect of the fuselage which will cause uneven distribution of load at the bottom of the aircraft, leading to changes in the aircraft’s attitude, causing great instability and affecting the safety of plane in emergency.