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Thermophysics and Aeromechanics

2013 year, number 1

Aerodynamic characteristics for a passenger aircraft model with harmonic oscillations on rolling and yawing angles at high angles of attack

V.I. Petoshin and E.A. Chasovnikov
Chaplygin Siberian Aeronautical Research Institute, Novosibirsk, Russia
Keywords: passenger aircraft model, harmonic oscillations, normalized frequency, high angles of attack, com-plexes of aerodynamic derivatives, mathematical model for aerodynamic loads
Pages: 39-48


Experimental values of complexes of aerodynamic derivatives were obtained in a wind tunnel and analyzed for subsonic flow of a passenger aircraft model with harmonic oscillations on the rolling and yawing angles. It was demonstrated that for near-critical angles of attack, the complexes of aerodynamic derivatives taken for rolling and yawing have a string dependency on the normalized oscillation frequency. It was proven that this dependency is driven by derivatives with respect to angular velocities and angular acceleration. A mathematical model for aerodynamic loads was developed; it can be applied for aircraft flight dynamic problems and has satisfactory approximation to experimental aerodynamic characteristics.