Nonlinear propagation of the sonic boom wave through the atmosphere turbulent layer

• Autorzy: Enflo B. O. , Rudenko O. V.
• Konferencja: Proceedings of the 2 nd EAA International Symposium on Hydroacoustics 24-27 May 1999, Gdańsk-Jurata POLAND
• Języki publikacji: EN

Abstrakty

EN

A new analytical approach to the statistical theory of sonic boom propagation through randomly inhomogeneous media is developed on the base of nonlinear evolution equations. The turbulent atmosphere layer is modelled by a random phase screen. A new Burqers' type equation is derived for arbitrary speeds of supersonic aircrafts using nonlinear geometrical acoustics approximation. The average peak pressure, squared pressure and dispersion of fluctuations are calculated, as well as statistical distributions for peak pressure and its outbursts. It is shown that in spite of decrease in the main characteristics of the N-wave, the fluctuations can increase and lead to the appearance of undesirable outbursts.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1999
• Tom: Vol. 2
• Strony: 263--266
• Opis fizyczny: Bibliogr. 2 poz., rys.

Twórcy

autor

Enflo B. O.

• Department of Mechanics, Kungl Tekniska Hógskolan (Royal Institute of Technology) 8-10044 Stockholm, SWEDEN

autor

Rudenko O. V.

• Department of Acoustics, Faculty of Physics, Moscow 8tate University, 119899 Moscow, RUSSIA

Bibliografia

• 1. YU.N. Makov, O.V. Rudenko, Dynamica of disturbances in nonlinear sawtooth waves, Acoustical Physics 42, pp728-732, (1996).
• 2. R.A. Lee, J.M. Downing. Sonic boom produced by US Air Force and US Navy aircraft: measurement data, Armstrong Lab., Wright-Patterson Air Force Base, Ohio. Rep. AL-TR-1991-0099, (1991).