Numerical simulations of the turbulent flow and the sound field of the Turkish ney end-blown flute
Jost Leonhardt Fischer, Rolf Bader · The Journal of the Acoustical Society of America · 2017
The Turkish ney is an end-blown flute in which sound generation is generated as an interplay between the air jet caused by the player and the sound pressure inside the flute tube. Sound pressure measurements inside the instrument show considerable nonlinear behavior which are crucial for the operation of the instrument and its sound character. Numerical simulations of the dynamics of both the turbulent flow field and the sound field solving the compressible Navier-Stokes equations, are performed. The transient process as well as the quasi steady-state operation mode of the instrument are performed. Varying the initial conditions of the blowing velocity as well as its attack time and shape result in the normal and in the overblown tones, which are characteristic of the instrument. Active elements like the turbulent air jet and rotating vortices around the labium as well as passive elements like the role of the mouthpiece and the resonator are discussed. A high agreement between numerical simulations and measurements is achieved.