Noise radiation from fan inlet and aft ducts

2nd AIAA/CEAS Aeroacoustics Conference

Volumn , Issue , 1996, Pages

  Nallasamy, M ^a,b  

^a NYMA Inc   (United States)

^b Aeromechanics Department   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC NOISE; AEROACOUSTICS; AERODYNAMICS; MACH NUMBER;

ACOUSTIC TREATMENT; ANALYTICAL RESULTS; ANGLE VARIATION; EXTERNAL FLOW; FINITE ELEMENT SOLUTION; MODE NUMBER; NOISE RADIATIONS; TURBOFAN NOISE;

DUCTS;

EID: 84977111306     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.1996-1769     Document Type: Conference Paper

References (14)

1. Groeneweg, J.F., & Rice, EJ., “Aircraft Turbofan Noise”, Trans. ASME Journal of Turbomachinery, Vol. 109, 1987, pp. 130-141.
2. Eversman, W. & Roy, I.D., “Ducted Fan Acoustic Radiation Including the Effects of Non-Uniform Mean Flow and Acoustic Treatment”, AIAA 93-4424, 1993.
3. Eversman, W, “Aft Fan Duct Acoustic Radiation”, CEAS/AIAA 95-155, 1995.
4. Philbrick D.A., & Topol, D.A., “Development of a Fan Noise Design System, Part 1: System Design and Source Modeling,” AIAA 93-4415, 1993.
5. Topol, DA., “Development of a Fan Noise Design System, Part 2: Far-Held Radiation and System Evaluation,” AIAA 93-4416, 1993.
6. Tyler, J.M., & Sofrin, T.G., “Axial Flow Compressor Noise Studies,” SAE Transactions, Vol. 70,1962 pp. 309-332.
7. Cumpsty, N.A., “A Critical Review of Turbomachinery Noise”, ASME Journal of Fluids Engineering, Vol 99, 1977, pp. 278-293.
8. Rice, EJ., Heidmann, M.F., & Sofrin, T.G., “Modal Propagation Angles in a Cylindrical Duct with Flow and Their Relation to Sound Radiation”, NASA TM-79030, Jan. 1979.
9. Homicz, G.F., & Lordi, J.A., “A Note on the Radiative Directivity Patterns of Duct Acoustic Modes”, Journal of Sound and Vibration, Vol. 41, 1975, pp. 283-290.
10. Savkar, S.D., “Radiation of Cylindrical Duct Acoustic Modes with Flow Mismatch”, Journal of Sound and Vibration, VoL 42, 1975, pp. 363-386.
11. Rice, E., & Saule A., “Far-field Radiation of Aft Turbofan Noise”, NASA TM 81506, 1980.
12. Rice, EJ., “Multimodal Far-Field Acoustic pattern Using Mode Cutoff Ratio”, AIAA Journal, VoL 16, 1978, pp. 906-911.
13. Rice, E J., “Acoustic Liner Optimum Impedance for Spinning Modes with Mode Cut-off Ratio as the Design Criteria”, NASA TM X-73411,1976.
14. Rice, EJ., & Sawdy, D.T., “A Theoretical Approach to Sound Propagation and Radiation for Ducts with Suppressors”, NASA-TM 82612, 1981.