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Analysis of the Flow Field in the Process of Rotorcraft Taking off and Landing on the Platforms of Ships

ABSTRACT Zheng, H.; Xiao-yu, S.; Xuan, G.; Ju, L., and Ying, Y.-C., 2018. Analysis of the flow field in the process of rotorcraft taking off and landing on the platforms of ships. In: Ashraf, M.A. and Chowdhury, A.J.K. (eds.), Coastal Ecosystem Responses to Human and Climatic Changes throughout Asia. Rotorcraft has been widely used with its characteristics of high adaptability, wide availability, and fast response. Currently, the variety of developments of rotorcraft enable it to occupy a position that cannot be replaced in military and civilian fields, but it still faces some urgent problems. Currently, the reliability of landing at an offshore platform is a research field that has drawn much attention. Different from land, the motion between the ship's deck and the aircraft is relative because of the waves in the sea. At the same time, when the sea air flows over the ship's deck, a spoiler can be generated, so as to affect 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 reduced. No one has an effective solution for this problem. The rapid development of computational fluid dynamics in recent years has realized the necessity to resolve the problem and has been applied on a large number of engineering problems. We used the computational fluid dynamics (CFD) techniques lattice Boltzmann method to solve the problem of the dynamic rotor aircraft's movements during the change of the flow field. By comparing different methods of calculation, the advantage of lattice Boltzmann method on solving the issue is explored, and then exploration of 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. The theoretical groundwork for the further application of CFD technology in the field of rotorcraft can also be provided.