About the complexity of propagation and radiation of ducted modes

6th Aeroacoustics Conference and Exhibit

Volumn , Issue , 2000, Pages

  Montétagaud, Fabienne ^a   Batard, Hervé ^a  

^a AIRBUS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC FIELDS; ACOUSTIC IMPEDANCE; ACOUSTIC NOISE; AEROACOUSTICS; ENGINES;

ACCURATE MODELING; ACOUSTIC TREATMENT; CYLINDRICAL DUCTS; IMPEDANCE DISCONTINUITIES; MODAL RECOMBINATION; NOISE SOURCE GENERATIONS; PHYSICAL PHENOMENA; RADIATED FIELD;

DUCTS;

EID: 85087193498     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.2000-1955     Document Type: Conference Paper

References (12)

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2. Eversman, W., "Computation of axial and transverse wave numbers for uniform two-dimensional ducts with flow using a numerical integration scheme," J. Sound Vib., Vol. 41, No. 2, 1975, pp. 252-255.
3. Lansing, D. L. and Zorumski, W. E., "Effects of wall admittance changes on duct transmission and radiation of sound," J. Sound Vib., Vol. 27, No. 1, 1973, pp. 85-100.
4. Zorumski, W. E., "Acoustic theory of axisymetric multi-sectioned ducts," Nasa TR R-419, 1974.
5. Snakowska, A. and Wyrzykowski, R., "Calculation of the acoustical field of a semi-infinite cylindrical wave-guide by means of the green function expressed in cylindrical coordinates," Archives of Acoustics, Vol. 11, 1986, pp. 261-285.
6. Homicz, G. F. and Lordi, J. A., "A note of the radiative directivity patterns of duct acoustic modes," J. Sound Vib., Vol. 41, No. 3, 1975, pp. 283-290.
7. Rice, E.J., "Multimodal far-field acoustic radiation pattern-An approximate equation," AIAA 4th Aeroacoustics Conference, Atlanta, Georgie, Vol. 77-1281, 1977.
8. Rice, E. J., Heidmann, M. F., and Sofrin, T. G., "Modal propagation angles in a cylindrical duct with flow and their relation to sound radiation," NASA TM-79030, 1979.
9. Farassat, F. and Myers, M.K., "A study of wave propagation in a duct and mode radiation," 2nd AIAA/CEAS Aeroacoustics Conference, State College, Pennsylvanie, Vol. 96-1677, 1996.
10. Zorumski, W.E., "Generalized radiation impedances and reflection coefficients of circular and annular ducts," J. Acoust. Soc. Am., Vol. 54, No. 6, 1973, pp. 1667-1673.
11. Cummings, A., "High frequency ray acoustics models for duct silencers," J. Sound Vib., Vol. 221, No. 4, 1999, pp. 681-708.
12. Henshaw, D.G., "Fanpac Model Fan Test Report (Task 2.4)," Technical Report Rolls-Royce, Fanpac-RR-96-T2-7.1, 1996.