Resolution Requirements for the Numerical Computation of Tonal Noise in Compressors and Turbines of Aeroengines
Abstract
The time linearized Euler method Lin3D is applied to two sets of test cases. 2D wave propagation test cases in homogeneous flow are used to quantify numerical dissipation and dispersion of the discretization scheme. The minimum number of mesh diagonals between two wave fronts has been found to be an appropriate measure of the resolution of a wave. Correlations have been found that characterize the dissipation and dispersion behavior of the code and therefore the resolution requirements for a given flow simulation. The transmission and reflection of plane sound waves incident upon a single cascade of finite plates has also been calculated with Lin3D and compared with an analytical method of Koch 5. The computed ratios of transmitted or reflected to incident pressure wave amplitude agree well with the analytical solution, even for scattered modes
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2003
- Accession Number
- ADP014099
Entities
People
- F. Kennepohl
- G. Kahl
- K. Heinig
- T. Huttl