NEW METHOD FOR HORIZONTAL TAIL PLANE BUFFETING LOAD PREDICTION

摘要

The buffeting phenomenon limits aircraft flight envelope, generating structural fatigue and creating certification constraints due to the appearance of unsteady aerodynamics loads in the structure of an aircraft. This phenomenon can appear in different places, depending on the flight conditions. As concerns the horizontal tail plane (HTP), buffeting mainly appears at high angles of attack and at low speeds and can be responsible for critical loads on the HTP, creating strong vibrations in the structure. There is thus a strong need to understand the main physics behind this phenomenon to accurately predict the aerodynamics loads on the structure. This paper presents a new approach to correctly model the unsteady aerodynamic loads resulting of the interaction between the wing wake and the horizontal tail plane. The method is based on the Corcos model and is compared to the method developed by Soumillon based on correlation functions. The results obtained by this new model show good agreement with the experimental data.