The subsonic hovering flow fields of Caradonna-Tung rotor are simulated by this way,in which the equations are solved on rotating coordinates and the meshes are constructed using overlap grids.

Experimental investigation on unsteady aerodynamics of rotor-blade airfoil;

Helicopter rotor smoothing based on GRNN neural network and genetic algorithm;

Study of aerodynamic model for the maneuvering rotor;

Experiments of rotor wake distortion in pitching maneuvers;

Euler solutions of transonic flow for a helicopter rotor in hover using multigrid method;

Numerical simulation of the viscous flow past a helicopter rotor in forward flight using newton-like sub-iterations;

Navier-Stokes computation about a helicopter rotor in hover using chimera grids and multigrid acceleration

In the coordinate system rotating with the blade, a free wake model for hovering rotors using an iterative procedure and the curved vortex element on the circular arc is established and checked by the comparisons with experimental data on the tip vortex path and blade bound circulation for two different model rotors.

In the method ,the blades are treated as rigid ones with offset and spring restrained hinges and with structural coupling between flap and lead lag motion for the purpose of being applicable to hingeless or starflex rotors.

A computational method based on rotor free-wake is developed for predictig flow field between the twin rotors of coaxial helicopters.