An effective method for numerically simulating helicopter rotor-fuselage aerodynamic interference using unstructured overset grids

Sections 1 and 2 of the full paper explain our effective method. Their core consists of: (1) we divide the computational domain into two zones: rotational zone and stationary zone; the rotational zone contains rotor blades and rotates with them; the stationary zone contains the fuselage; their overlapping zone interpolates the information of flow field; (2) we use the dual-time stepping method to solve the unsteady Euler equations. Section 3 simulates the Georgia Tech configuration rotor-fuselage interference flow field and compares the simulation results with the experimental data in Ref. 8 and the calculation results in Refs. 9 and 10. The simulation results, presented in Figs. 2 through 5, and their analysis show preliminarily that our method is effective and robust for the prediction of complicated unsteady rotor-fuselage aerodynamic interference; the effectiveness of our method is presented in the conclusions in section 4.