Modelling and Supercomputer Simulation of Hinged Rotor

The paper presents a computational technology of numerical simulation of turbulent flow over a hinged rotor on high-performance heterogeneous computer systems. A key part of the technology is the developed mathematical model describing the complex motions of triple-hinged rigid blades of a helicopter under the action of external and aerodynamic forces and its implementation using an original unstructured mesh-deformation algorithm. The mesh-deformation method exploits an auxiliary web-structured mesh with its elastic compression-expansion controlled by low-cost quasi-one-dimensional strand-based algorithms. The mechanics model is verified by solving the pendulum problems. To demonstrate the correctness of the developed techniques, the problems on taper stabilization and blade motion under cyclic control for model helicopter rotors are considered. All the presented computations are carried out using the code NOISEtte for solving aerodynamics and aeroacoustics problem. The code implements higher-accuracy methods of computational fluid dynamics on unstructured mixed-element meshes and operates with a high efficiency on modern supercomputers with arbitrary architectures including CPU cores and GPU accelerators.