Investigation of an anomaly observed in impedance eduction techniques

14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference)

Volumn , Issue , 2008, Pages

  Watson, W R ^a,b   Jonest, M G ^a,b   Parrott, T L ^a,b  

^a NASA LANGLEY RESEARCH CENTER   (United States)

^b Research and Technology Directorate   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ANOMALOUS BEHAVIOR; ANTI-RESONANCE; GRID REFINEMENT; HIGHER-ORDER MODES; IMPEDANCE BOUNDARY CONDITIONS; IMPEDANCE EDUCTION; MEASURED DATA; MODEL RESULTS; OPTIMIZATION TECHNIQUES; PLANE WAVE; PRESSURE CONDITIONS; ROOT CAUSE; TERMINATION RESISTANCE;

BOUNDARY CONDITIONS; RESONANCE;

AEROACOUSTICS;

EID: 78249234756     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (9)

1. Jones, M. G., Watson, W. R., Tracy, M. B., and Parrott, T. L., "Comparison of Two Acoustic Waveguide Methods for Determining Liner Impedance," Proceeding of the 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, AIAA 2001-2266, Maastricht, The Netherlands, May 28-30, 2001
2. Watson, W. R., Jones, M. G., and Parrott, T. L., "Validation of an Impedance Eduction Method in Flow," AIAA Journal Vol. 37, No. 7, July 1999, pp. 818-824.
3. Watson, W. R. and Jones, M. G., "Comparison of Convected Helmholtz and Euler Model for Impedance Eduction in Flow," AIAA Paper 2006-2643, Proceedings of the 12th AIAA/CEAS Aeroacoustics Conference & Exhibit, Cambridge, MA, May, 2006.
4. Watson, W. R., Tracy, M. B., Jones, M. G., and Parrott, T. L., "Impedance Eduction in Shear Flow," AIAA Paper 2001-2263, Proceedings of the 7th AIAA/CEAS Aeroacoustics Conference & Exhibit, Maastricht, The Netherlands, May 28-30, 2001.
5. Myers, M. K., "On the Acoustic Boundary Condition in the Presence Of Flow," Journal Of Sound And Vibration, Vol. 71, No. 3, 1980, pp. 429-434.
6. Thompson, K.W., "Time Dependent Boundary Conditions for Hyperbolic Systems," Journal of Computational Physics Vol. 68, pp. 1-28, 1987.
7. Watson, W., Jones, M., and Parrott, T, "A Quasi-3-D Theory for Impedance Eduction in Uniform Grazing Flow," AIAA Paper 2005-2848, Proceedings of the 11th AIAA/CEAS Aeroacoustics Conference & Exhibit, May 23-25, 2005, Monterey, CA.
8. Stewart, G. W. Ill "A Modification of Davidon's Minimization Method to Accept Difference Approximations of Derivatives," Journal of ACM, Vol. 14, No. 1, 1967, pp 72- 83.
9. Goldberg, D., Genetic Algorithms in Search, Optimization and Machine Learning, Addison-Wesley, New York, NY, 1989, pp. 75 - 147.