Mechanical-aerodynamic feedback in the process of sound generation

For many years phenomena of aerodynamic sound production have been known in the physical aspect, while a mathematical description of it is still in-sufficient. Therefore, investigations which have the increase of theoretical know-ledge of this problem in view, have been performed. These investigations are concer¬ned mainly with the interactions between aerodynamic and acoustic phenomena. However, in some cases of aerodynamic sound production, mechanical vibra¬tions are of importance.
The aim of this work is investigation of the set-up in which mechanical vibrations play an important part in aerodynamic sound production. An at¬tempt is made to explain the mutual aero-vibroacoustie interactions by means of feedback systems. Laboratory tests were carried out in order to perform the preliminary verification.