Российский фонд
фундаментальных
исследований

Физический факультет
МГУ им. М.В.Ломоносова
 

08.11 Звук в трубах с потоками

 

Bashkatov V.V., Ostrikov N.N. «Influence of the Nonlinear Operating Mode of Acoustic Liners at High Sound Pressure Levels on Sound Wave Propagation in a Cylindrical Duct with a Flow» Acoustical Physics, 70, № 1, с. 9-20 (2024)

The problem of sound propagation in a cylindrical duct with a uniform flow is considered with nonlinear impedance boundary conditions resulting from the dependence of the impedance of acoustic liners on the sound pressure level. An iterative procedure for solving this problem has been constructed, in which sound propagation is described by an asymptotic solution to the problem of the propagation of sound modes in a cylindrical duct with a uniform flow with a smoothly non-uniform impedance of the walls in the axial direction, and the nonlinear mode of operation of the liners is based on a semiempirical model of a two-layer acoustic liners. It is shown that the constructed iterative algorithm converges within the limits of applicability of the asymptotic solution and diverges beyond them. It is shown that, for the parameters with which the calculations were carried out, the nonlinear effect of the liners operation leads to an increase in sound attenuation compared to a linear solution of a similar problem, and this effect is when sound propagates along rather than against the flow.

Acoustical Physics, 70, № 1, с. 9-20 (2024) | Рубрики: 05.03 08.11 08.14

 

Шайдуллин Л.Р. «Экспериментальное исследование осаждения аэрозоля в открытой трубе при резонансных колебаниях различной интенсивности» 9-я Международная конференция – школа молодых ученых «Волны и вихри в сложных средах». Москва, 05–07 декабря 2018 г., с. 175-177 (2018)

9-я Международная конференция – школа молодых ученых «Волны и вихри в сложных средах». Москва, 05–07 декабря 2018 г., с. 175-177 (2018) | Рубрики: 04.09 08.11