The transmission of intense transient and multiple frequency sound waves through orifice plates with mean fluid flow

A. Cummings , I.-J. Chang

A inviscid flow model is presented here, describing the transmission of intense sound waves through perforated plates with mean fluid flow through the orifices, normal to the plate. The time dependence in the acoustic wave is arbitrary, and the differential equations governing the orifice flow are solved numerically in the time domain. It is noted that both the mean flow velocity and the orifice velocity perturbation are contained in a hydrodynamic resistance term in the governing equations, and that acoustic energy losses are dependent on these quantities. Comparison is made between theoretical predictions of sound transmission through orifice plates and measured data, and the agreement is found to be generally good.

Mots clés: differential equations; hydrodynamic resistance term; acoustic wave transmission; transmission; intense transient; multiple frequency sound waves; orifice plates; mean fluid flow; inviscid flow model; perforated plates

Domaines: Articles anciens

A. Cummings, I.-J. Chang. The transmission of intense transient and multiple frequency sound waves through orifice plates with mean fluid flow. Revue de Physique Appliquée, 1986, 21 (2), pp.151-161. ⟨10.1051/rphysap:01986002102015100⟩. ⟨jpa-00245420⟩