The detection of radiated modes from ducted fan engines

7th AIAA/CEAS Aeroacoustics Conference and Exhibit

Volumn , Issue , 2001, Pages

  Farassat, F ^a,b   Nark, Douglas M ^a,c   Thomas, Russell H ^a,b  

^a NASA LANGLEY RESEARCH CENTER   (United States)

^b Aeroacoustics Branch   (United States)

^c Computer Sciences Corporation ^*  (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC NOISE; AEROACOUSTICS; AIRCRAFT ENGINES; DUCTS; ENGINES; LINEAR EQUATIONS; LOW PASS FILTERS; MICROPHONES; NOISE ABATEMENT;

CIRCULAR MICROPHONE ARRAYS; CIRCUMFERENTIAL MODES; COMPLEX AMPLITUDE; NOISE GENERATION MECHANISMS; NON-INTRUSIVE TECHNIQUES; SYSTEM OF EQUATIONS; SYSTEM OF LINEAR EQUATIONS; TIKHONOV REGULARIZATION;

DUCTED FAN ENGINES;

EID: 85088757629     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.2001-2138     Document Type: Conference Paper

References (7)

1. Pickett, G. F., Sofrin, T. G., and Wells, R. A., "Method of Fan Sound Mode Structure Determination. Final Report," NASA CR-135293, Aug. 1977.
2. Heidelberg, L. J. and Hall, D. G., "Inlet Acoustic Mode Measurements Using a Continuously Rotating Rake," Journal of Aircraft, Vol. 32, No. 4, 1995, pp. 761-767.
3. Kress, Rainer, Numerical Analysis. Springer- Verlag, 1998, Chapter 5.
4. Engl, Heinz W., Hanke, Martin. Neubauer, Andrea, Regularization of Inverse Problems, Kluwer Academic Publishers, 1996, Chapter 5.
5. Farassat, F. and Myers, M. K., "A Study of Wave Propagation in a Duct and Mode Radiation," May 6-8, 1996, State College, PA, AIAA/CEAS Paper No. 96-1677.
6. Gradshteyn, IS. and Ryzhik I. M., Tables of Integrals, Series, and Products, 4th Ed., Academic Press, 1965.
7. Tikhonov, A. N. and Arsenin, V., Solutions of Ill-Posed Problems. Wiley, 1977.