复杂海况下航母纵向运动及舰载机起降CFD模拟OA

The take-off and landing of carrier-based aircraft are directly influenced by the airflow field over the aircraft carrier deck.The longitudinal movement of the carrier caused by different sea conditions further complicates the airflow field.In order to accurately assess the characteristics of carrier-based aircraft take-off and landing,and identify key flow regions and influencing factors,it is necessary to conduct efficient and refined multi-body and multi-physical field cou-pling simulations.Taking the angled straight-through deck carrier as the research object,a multi-field coupling simula-tion model of wind-wave-carrier-aircraft is constructed.Computational fluid dynamics methods are used to explore the influence mechanism of the airflow field at the bow and stern of the carrier on the take-off and landing process of carrier-based aircraft when the carrier is moving into the wind and waves and under going longitudinally motion under sea conditions of 3 to 6.Through the VOF multiphase model,fifth-order wave model,DFBI motion model and overlap-ping grid technology,the characteristics of the carrier's heave and pitch motion under different sea conditions,as well as the lift behavior of carrier-based aircraft during the catapult take-off and landing stages are simulated.The results show that under sea conditions of 3 to 6,the carrier's motion is periodic,and the wide and flat hull gives it good motion stability;during take-off,the carrier-based aircraft is disturbed by the separation vortex at the bow,and the lift fluctua-tion increases with the increase of sea condition grade,and there is a lift attenuation phenomenon after leaving the car-rier;during the landing process,the stern flow causes a decrease in lift when the carrier-based aircraft approaches the stern,and the lift fluctuation is most significant under sea condition 6 due to the separation vortex at the stern.