The propeller slipstream passed through the rotor plane when the autogyro is flying forward, will produce the unsteady aerodynamic interference on the autorotating rotor. Based on the RANS equations(Reynolds averaged Navier-Stokes), a computational analysis method for the aerodynamic interference flow field of autorotating rotor-propeller is established by using the moving embedded grids method, and the model is simulated. The unsteady aerodynamic characteristics and flow field characteristics of the isolated and combined autorotating rotor at low speed are analyzed. The effects of different velocities and propeller positions on the aerodynamic characteristics of the spinning rotor are studied. The results show that the propeller slipstream affects the lift-drag characteristics of the autorotating rotor at all azimuths, and causes the distortion of the rotor wake near 0° azimuth. Under the same rotor thrust, the larger the inflow velocity, the smaller the rotor tilt angle, and the smaller the influence of propeller slipstream on the autorotating rotor. Increasing the pitch between the propeller and the autorotating rotor can reduce the aerodynamic interference of the propeller slipstream on the rotor.
Analysis on the Propeller Slipstream Interference with Autorotating Rotor Aerodynamic Characteristics
2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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