Αποτελέσματα αναζήτησης - P. V. Makeev

This article is concentrated on modeling and researching of aerodynamic characteristics of main and tail rotors’ combination of a single-rotor helicopter scheme. Non-linear free wake vortical model with diffusion of free wake is used. The model is constructed on the base of Helicopter Design Faculty...

Πλήρης περιγραφή

The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter. A feature of the helicopter rotor aerodynamics is a significant inductive blade influence that highly defines its aerodynamic c...

Πλήρης περιγραφή

The vortex ring states are observed when the rotor is flowed at positive angles of attack. For the main rotor, these conditions are realized during a steep descent of the helicopter at low speeds. The rotor vortex ring states are affected by significant phenomena related to the behavior of its aerod...

Πλήρης περιγραφή

For single-rotor helicopters there are special flight modes, when tail rotor (TR) is under significant inductive influence of vortical wake of main rotor (MR). Inductive influence of vortical wake of MR can provoke essential changes in flowing of TR and its aerodynamic characteristics comparing to i...

Πλήρης περιγραφή

The article presents the results of numerical studies of aerodynamic characteristics of isolated three-bladed tail rotor, and X-shaped tail rotor at "vortex ring". Calculations of aerodynamic characteristics of rotors are based on nonlinear blade vortex model developed at the Department of...

Πλήρης περιγραφή