Duct acoustics and acoustic finite element method
Abstract
A comprehensive solution method - Acoustic Finite Element Method - has been proposed. In order to generate confidence in the method proposed, the problem of influence of shear flow in a two-dimensional channel on sound propagation from an arbitrary source distribution has been theoretically formulated. From the preliminary investigation of application of acoustic finite element method, it seems that it can provide solutions to problems concerning the transmission of sound in variable area ducts, or in ducts in which the boundary layer depends on the streamwise variable, or in ducts with discontinuities in lining impedance and with end termination impedances, both the inlet and exhaust jet flows being taken into account.
- Publication:
-
AIAA Conference on the Exploration of the Outer Planets
- Pub Date:
- March 1975
- Bibcode:
- 1975aiaa.confQ....K
- Keywords:
-
- Acoustic Ducts;
- Finite Element Method;
- Jet Exhaust;
- Shear Flow;
- Sound Propagation;
- Boundary Value Problems;
- Discontinuity;
- Flow Velocity;
- Inlet Flow;
- Numerical Integration;
- Sound Pressure;
- Stiffness Matrix;
- Weighting Functions;
- Acoustics