A feasibility study of a 3-D finite element solution scheme for aeroengine duct acoustics
- Abrahamson, A. L.
- Sep 15, 1980.
- Physical Description:
- 1 electronic document
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- The advantage from development of a 3-D model of aeroengine duct acoustics is the ability to analyze axial and circumferential liner segmentation simultaneously. The feasibility of a 3-D duct acoustics model was investigated using Galerkin or least squares element formulations combined with Gaussian elimination, successive over-relaxation, or conjugate gradient solution algorithms on conventional scalar computers and on a vector machine. A least squares element formulation combined with a conjugate gradient solver on a CDC Star vector computer initially appeared to have great promise, but severe difficulties were encountered with matrix ill-conditioning. These difficulties in conditioning rendered this technique impractical for realistic problems.
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19800025708.
Accession ID: 80N34216.
- No Copyright.
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