Mathematical Modelling of Aircraft Unsteady Aerodynamics at High Incidence with Account of Wing-Tail Interaction

TLDR

Unsteady wing‑tail interaction is a key focus in the mathematical modelling of aircraft aerodynamics. A state‑space model of longitudinal unsteady aerodynamics was developed from wind‑tunnel data, covering steady and dynamic tests across a wide range of angles of attack and configurations including body, tail, wing, and full airliner.

Abstract

The state‐space mathematical model of longitudinal unsteady aerodynamics for complete airliner configuration in a wide range of incidence was developed using various wind tunnel experimental data. The experimental investigations for steady and dynamic tests were performed in low subsonic wind tunnel for a wide region of angles of attack. The dynamic tests included pitch small and large amplitude oscillations with various frequencies. The experiments were executed for various aerodynamic model configuration: body alone, body with horizontal tail, body with wing, complete airliner model (body+wing+tail). During mathematical modelling the special attention was given to the problem of unsteady wing‐tail interaction.