The Study Of The Flow Field During The Process Of Rotorcraft Taking Off And Landing On The Platforms Of Ship

Rotorcraft has been widely used with its characteristics of high adaptability,wide availability and fast response.Currently,the variety developments of rotorcraft make it occupy a position that cannot be replaced in military and civilian fields,but it still faces some urgent problems.Now,the reliability of landing at an offshore platform is a hot research field which has drawn much attention.Different from the case on land,the motion between the ship's deck and the aircraft is relative due to the waves in the sea.At the same time,when the sea air flows over the ship's deck,spoiler can be generated,so as the rotorcraft.The spoiler's interaction will produce two vortexes.Which generates some uncertainty force on the main rotor and other parts,making the reliability of taking off and landing rotorcraft greatly been reduced.No people have effective solution for it.The rapid development of computational fluid dynamics in recent years has brought the dawn to resolve the problem,and has been applied on a large number of engineering problems.Aiming at this problem,we try the use of CFD(Computational Fluid Dynamics)techniques lattice Boltzmann method to solve the problem of dynamic rotor aircraft's movements during the change of the flow field.First of all,by comparing different methods of calculation,the advantage of lattice Boltzmann method on solving the issue is explored;secondly,explore the feasibility and reliability of the lattice Boltzmann method is validated.Finally,different cases are analyzed and calculated according to the practical problems of different working conditions.By comparing the results,the rotorcraft flow field's variation in the landing process is summarized,which can provide technical support for Rotorcraft's taking off and landing.What's more,the theoretical groundwork for the further application of CFD technology in the field of rotorcraft can also be provided.