Liner optimization studies using the ducted fan noise prediction code TBIEM3D

4th AIAA/CEAS Aeroacoustics Conference

Volumn , Issue , 1998, Pages 627-636

  Dunn, M H ^a   Farassat, F ^b  

^a OLD DOMINION UNIVERSITY   (United States)

^b NASA LANGLEY RESEARCH CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC FIELDS; ACOUSTIC NOISE; ACOUSTIC NOISE MEASUREMENT; ACOUSTICS; AEROACOUSTICS; NOISE ABATEMENT;

ATTENUATION LEVELS; FAR-FIELD NOISE; IMPEDANCE PLANE; LARGE REGIONS; LINER IMPEDANCE; OPTIMIZATION DESIGN; OPTIMIZATION STUDIES; RADIATED SOUND PRESSURE;

OIL WELL CASINGS;

EID: 84977068180     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.1998-2310     Document Type: Conference Paper

References (7)

1. R.E. Motsinger and R. E. Kraft: Design and Performance of Duct Acoustic Treatment, in Aeroacoustics of Flight Vehicles- Theory and Practice, Vol. 2, H. H. Hubbard, NASA RP-1258, 1991
2. Harold C. Lester and Joe W. Posey: Optimal One-Section and Two-Section Circular Sound- Absorbing Duct Liners for Plane-Wave and Monopole Sources without Flow, NASA TN D-8348, December 1976
3. Edward J. Rice: Attenuation of Sound in Ducts with Acoustic Treatment - A generalized Approximate Equation, NASA TM X-71830, 1975.
4. Edward J. Rice: Acoustic Liner Optimum Impedance for Spinning Modes with Cut-Off Ratio as the Design Parameter, NASA TM X-73411, 1976.
5. Tony L. Parrott and Michael G. Jones: Parallel-Element Liner Impedances for Improved Absorption of Broadband Sound in the Duct, Noise Control Engineering Journal, Vol. 43(6), 1995, p 183-195
6. M.H. Dunn: TBIEM3D-A Computer Program for Predicting Ducted Fan Engine Noise, Version 1. 1. NASA/CR-97-206232, September 1997.
7. M.H. Dunn, J. Tweed, and F. Farassat: The Prediction of Ducted Fan Engine Noise Via a Boundary Integral Equation Method. AIAA Paper 96-1770, April, 1996.