Investigations On The Characteristics Of Ship Deck Flow Field Under Helicopter/ship Coupling

The role of SEA in modern naval warfare has became more and more important.With the development of aircraft carrier the carrier – based aircraft has a great and continuous development,in particular helicopters and fighter jets.However,the landing safety of carrier – based aircraft always has a very prominent problem.The complicated and variable sea conditions and relative airflow generated by the aircraft carrier during high speed voyage will form complex flow field structures,throughout the straight through – deck,including the up-wash flow on the head of ship,the flow around ship island,the wake of ship island.The combination of these vortex structures will have a great impact on the take – off and landing of helicopters,resulting in fatal hazards,leading to the possibility of the safe take-off and landing of helicopter gunships lower and lower even causing crashes.In this paper,mainly used wind tunnel experiments.Designing a model with amphibious assault ships and typical deck structures,and to study the structure of the space flow field under the condition of static and static ship-ship coupling.And a dynamic mechanism is designed to simulate the state of naval ship rolling,and the structure of the flow field under the ship roll is studied.To research and analysis of the flow field of plane and space ship in three typical conditions of wind over deck of 0°,50°and-50°under the deck through static structure,dynamic space structure,ship machine when the coupling of static and dynamic structure of ship flow field structure by using seven hole probe flow measurement,surface oil flow visualization experiment technology,surface pressure measurement technology,PIV measurement technology.By the research on the flow field structure of straight-through deck wharf can provide reasonable safe take – off and landing suggestions.Also support help for ship shape design.