The effect of non-harmonic active twist actuation on BVI noise

Annual Forum Proceedings - AHS International

Volumn 1, Issue , 2011, Pages 37-46

  Fogarty, David E ^a   Wilbur, Matthew L ^b   Sekula, Martin K ^b  

^a NATIONAL INSTITUTE OF AEROSPACE   (United States)

^b NASA LANGLEY RESEARCH CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC ANALYSIS; ACTIVE TWIST; ACTIVE TWIST ROTOR; ADVANCE RATIO; AEROELASTIC BEHAVIOR; ANALYTICAL MODEL; BLADE-VORTEX INTERACTION NOISE; BVI NOISE; COMPUTATIONAL STUDIES; FLIGHT CONDITIONS; ROTOR BLADES; ROTOR DIAMETER; THREE PARAMETERS;

AEROELASTICITY; HARMONIC ANALYSIS; HELICOPTER ROTORS; HELICOPTERS; MATHEMATICAL MODELS; ROTORS (WINDINGS); TURBOMACHINE BLADES;

ACOUSTIC NOISE;

EID: 79960661758     PISSN: 15522938     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (26)

1. Gallman, J. M., "Parametric Computational Study of Isolated Blade-Vortex Interaction Noise", AIAA Journal, Vol. 32, No. 2, February 1994.
2. Yu, Y. H., "Miss-distance for Rotor Blade-Vortex Interaction Noise Reduction", AIAA and CEAS, Aeroacoustics Conference, 2nd, State College, PA, May 6-8, 1996.
3. Preisser; J. S., Brooks, T. F., and Martin, R. M., "Concepts for Reduction of Blade Vortex Interaction Noise", Journal of Aircraft, Vol. 31, No. 5, Sept.-Oct. 1994.
4. Martin, R. M., Splettstoesser, W. R., Elliott, J. W., and Schultz, K. J., "Advancing Side Directivity and Retreating Side Interactions of Model Rotor Blade Vortex Interaction Noise," NASA TP-2784, May 1988.
5. Splettstoesser, W. R., Schultz, K. J., Boxwell, D. A., and Schmitz, F. H., "Helicopter Model Rotor-Blade Vortex Interaction Impulsive Noise: Scalability and Parametric Variations," NASA TM-86007, Dec. 1984.
6. Hoad, D. R., "Helicopter Model Scale Results on Blade-Vortex Interaction Impulsive Noise as Affected by Tip Modification," American Helicopter Society, AHS Paper no. 80-62, May 1980.
7. Martin, R. M., and Connor, A. B., "Wind Tunnel Acoustic Results of Two Rotor Models with Several Tip Designs," NASA TM-87698, July 1986.
8. Boxwell, D. A., and Schmitz, F. H., "Full-Scale Measurements of Blade Vortex Interaction Noise," Journal of the American Helicopter Society, Vol. 27, No. 4, 1982, pp. 11-27.
9. Charles, B. D., "Acoustic Effects of Rotor-Wake Interaction During Low-Power Descent," American Helicopter Society Symposium on Helicopter Aerodynamic Efficiency, May 1975.
10. rd AHS National Forum, Washington D.C., Paper no. 33-05, May 1977.
11. Patt, D., Liu, L., and Friedmann, P. P., "Simultaneous Vibration and Noise Reduction in Rotorcraft Using Aeroelastic Simulation", American Helicopter Society 60th Annual Forum, Baltimore, MD, June 7-10, 2004.
12. Splettstoesser, W. R., Kube, R., Seelhorst, U., Wagner, W., Boutier, A., Micheli, F., Mercker, E., Pengel, K.: "Higher Harmonic Control Aeroacoustic Rotor Test (HART) - Test Documentation and Representative Results," IB 129-95/28, Deutsche Forschungsanstalt für Luft- und Raumfahrt, December 1995.
13. Brooks, T. F., and Booth, E. R., Jr., "The Effects of Higher Harmonic Control on Blade-Vortex Interaction Noise and Vibration", Journal of the American Helicopter Society, Vol. 38 (3), July 1993.
14. Booth, E. R. and Wilbur, M. L., "Acoustic Aspects of Active-Twist Rotor Control," Journal of the American Helicopter Society, January 2004, pp. 3-10.
15. th Annual Forum and Technology Display, Phoenix, AZ, 11-13 May 2010.
16. Johnson, W., CAMRAD II, Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics, Johnson Aeronautics, Palo Alto, California, 1994.
17. th Annual Forum, Montreal, Canada, May 25-27, 1999.
18. Brentner, K.S.: "Prediction of Helicopter Discrete Frequency Noise - A Computer Program Incorporating Realistic Blade Motions and Advanced Acoustic Formulation", NASA TM 87721, October 1986.
19. Hermes, C., Lopes, L., Shirey, J., Erwin, J.: "PSU-WOPWOP 3.3 User's Guide", The Pennsylvania State University, June 28, 2007.
20. Brentner, K. S., Burley, C. L., and Marcolini, M. A., "Sensitivity of Acoustic Predictions to Variation of Input Parameters", Presented at The AHS-RAeS International Technical Specialists Meeting on Rotorcraft Acoustics and Rotor Fluid Dynamics, October 1991. Philadelphia. PA.
21. Gallman, J. M., Schultz, K.-J., Spiegel, P., and Burley, C. L., "Effect of Wake Structure on Blade-Vortex Interaction Phenomena: Acoustic Prediction and Validation", Journal of Aircaft, Vol. 35, No. 2, March-April 1998.
22. Malovrh, B., and Ghandi, F., "Localized Individual Blade Root Pitch Control for Helicopter Blade-Vortex Interaction Noise Reduction", Journal of the American Helicopter Society, 55, 032007 (2010).
23. th Annual Forum, Montreal, Canada, May 25-27, 1999.
24. Hardin, J. C. and Lamkin, S. L., "Concepts for Reduction of Blade/Vortex Interaction Noise", Journal of Aircraft, Vol. 24, No. 2, pp. 120-125, 1987.
25. McCroskey, W. J., "Vortex Wakes of Rotorcraft", AIAA Paper 1995-530.
26. Malovrh, B., and Ghandi, F., "Sensitivity of Helicopter Blade-Vortex-Interaction Noise and Vibration to Interaction Parameters", Journal of Aircraft, Vol. 42, No. 3, May-June 2005.