Propagation of spinning acoustic modes in turbofan exhaust ducts

Journal of Propulsion and Power

Volumn 16, Issue 5, 2000, Pages 736-743

  Nallasamy, M ^a   Sutliff, D L ^b   Heidelberg, L J ^c  

^a Dynacs Engineering Company Inc   (United States)

^b AYT Corp   (United States)

^c NASA GLENN RESEARCH CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC WAVE PROPAGATION; FINITE ELEMENT METHOD; MACHINE DESIGN; PRESSURE; ROTORS (WINDINGS); SPEED; STATORS; TURBOFAN ENGINES;

ACOUSTIC PRESSURE; EXHAUST HUB TO TIP RADIUS RATIO; MACH NUMBER; ROTOR STATOR INTERACTION TONES; SPINNING ACOUSTIC MODES; TURBOFAN EXHAUST DUCTS;

EXHAUST SYSTEMS (ENGINE);

EID: 0034271465     PISSN: 07484658     EISSN: None     Source Type: Journal    
DOI: 10.2514/2.5654     Document Type: Article

References (11)

1. Tyler, J. M., and Sofrin, T. G., "Axial Flow Compressor Noise," SAE Transactions, Vol. 70, 1962, pp. 309-332.
2. Tam, C. K. W., "Transmission of Spinning Acoustic Modes in a Slightly Non-Uniform Duct," Journal of Sound and Vibration, Vol. 18, No. 3, 1971, pp. 339-351.
3. Cho, Y. C., and Ingard, K. U., "Closed-Form Solution of Mode Propagation in a Non-Uniform Circular Duct," AIAA Journal, Vol. 20, No. 1, 1982, pp. 39-44.
4. Silcox, R. J., and Lester, H. C., "Sound Propagation Through a Variable Area Duct: Experiment and Theory," AIAA Journal, Vol. 20, No. 10, 1982, pp. 1377-1384.
5. Nayfeh, A. H., Shaker, B. S., and Kaiser, J. E., "Transmission of Sound Through Circular Ducts with Compressible Mean Flows," AIAA Journal, Vol. 18, No. 5, 1980, pp. 515-525.
6. Eversman, W., "Aft Fan Duct Acoustic Radiation," CEAS/AIAA Paper 95-155, June 1995.
7. Nallasamy, M., "Computation of Noise Radiation from Fan Inlet and Aft Ducts," Journal of Aircraft, Vol. 34, No. 3, 1997, pp. 387-393.
8. Envia, E., and Nallasamy, M., "Design Selection and Analysis of a Swept and Leaned Stator Concept," NASA TM-208662, Dec. 1998.
9. Hall, D. G., Heidelberg, L. J., and Konno, K., "Acoustic Mode Measurements in the Inlet of a Model Turbofan Using a Continuously Rotating Rake: Data Collection and Analysis Techniques," AIAA Paper 93-0599, Jan. 1993.
10. Heidelberg, L. J., Hall, D. G., Bridges, J. E., and Nallasamy, M., "A Unique Ducted Fan Test Bed for Active Noise Control and Aeroacoustic Research," AIAA Paper 96-1740, May 1966.
11. Cicon, D. E., Sofrin, T. G., and Mathews, D. C., "Investigation of Continuously Traversing Microphone System for Mode Measurement," NASA CR-168040, Nov. 1982.