Аэродинамические характеристики несущего винта вертолёта в спутном следе другого вертолёта

Abstract

The influence of vortex wake of the helicopter on the aerodynamic characteristics of another helicopter’s main rotor is investigated. The mathematic models of near and far vortex wake are used. For the near wake the numerical modeling of the flow about both helicopters’ main rotors is carried out by the method of discrete vortices. The far wake model accounts for damping and wake destruction due to the atmosphere turbulence, viscous friction force, and Archimedean buoyant force. Increments of aerodynamic characteristics of the rotor of the helicopter in the wake compared with the flight out of the wake are computed using results of the calculations according to the both models.