Helicopter rotor wake dynamics during simulated tactical maneuvers

Annual Forum Proceedings - American Helicopter Society

Volumn 1, Issue , 2004, Pages 949-980

  Ananthan, Shreyas ^a   Leishman, J Gordon ^a  

^a UNIVERSITY OF MARYLAND   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AIRLOADS; ROTOR DISKS; SPATIAL RESOLUTION; WAKE DYNAMICS;

ACCELERATION; COST EFFECTIVENESS; FLIGHT DYNAMICS; HELICOPTER ROTORS; MANEUVERABILITY; THRUST BEARINGS; VELOCITY CONTROL; VORTEX FLOW;

WAKES;

EID: 4143132062     PISSN: 07334249     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (36)

1. Prandtl, L, and Tietjens, O. G., Fundamentals of Hydro- and Aero-Mechanics, McGraw-Hill, New York, 1934, pp. 382-393.
2. Taylor, M. K., "A Balsa-Dust Technique for Air-Flow Visualization and its Application to Flow through Model Helicopter Rotors in Static Thrust," NACA TN-2220 Nov. 1950.
3. Carpenter, P. J., and Friedovich, B., "Effect of A Rapid Blade-Pitch Increase on the Thrust and Induced-Velocity Response of a Full-Scale Helicopter Rotor," NACA TN 3044, Nov. 1953.
4. Ellenrieder, T. J., and Brinson, P. R., "The Dynamic Induced Velocity Field of a Model Rotor in Hover Conditions," The Aeronautical Journal, June-July 1998, pp. 331-335.
5. th Annual Forum of the American Helicopter Society International, Pheonix, AZ, May 6-9, 2003.
6. th European Rotorcraft Forum, Moscow, Russia, Sept. 11-14, 2001.
7. th Decennial Specialist's Conference on Aeromechanics, San Francisco, CA, Jan. 21-23, 2004.
8. Rosen, A., and Isser, A., "A New Model for Rotor Dynamics During Pitch and Roll of a Hovering Helicopter," Journal of the American Helicopter Society, Vol. 40, No. 3, 1995, pp. 17-28.
9. nd Annual National Forum, Washington, DC, June 4-6, 1996.
10. Barocela, E., Peters, D. A., Kothapalli, K. R., and Prasad, J. V. R., "The Effect of Wake Distortion on Rotor Inflow Gradients and Off-Axis Coupling," AIAA Flight Mechanics Conference Proceedings, San Diego, CA, July 29-31, 1997.
11. th European Rotorcraft Forum, Rome, Italy, Sept. 1999.
12. th AIAA/CEAS Aeroacoustics Conference, Lahaina, Hawaii, June 12-14, 2000.
13. th Annual National Forum, Montréal, Cananda, June 11-13, 2002.
14. th Annual Forum of the American Helicopter Society International, Phoenix, AZ, May 6-8, 2003.
15. Leishman, J. G., Bhagwat, M. J., and Bagai, A., "Free-Vortex Filament Methods for the Analysis of Helicopter Rotor Wakes," Journal of Aircraft, Vol. 39, No. 5, Sept.Oct. 2002, pp. 759-775.
16. Scully, M. P., "A Method of Computing Helicopter Vortex Wake Distortion," Massachusetts Institute of Technology Report No. ASRL TR 138-1, June 1967.
17. Scully, M. P., "Computation of Helicopter Rotor Wake Geometry and Its Influence on Rotor Harmonic Airloads," Massachusetts Institute of Technology Report No. ASRL TR 178-1, March 1975.
18. Johnson, W., "A Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics, Part I: Analytical Development," NASA TM 81182, 1980.
19. Bagai, A., Leishman, J. G., and Park, J., "Aerodynamic Analysis of a Helicopter in Steady Maneuvering Flight Using a Free-Vortex Rotor Wake Model," Journal of the American Helicopter Society, Vol. 44, No. 2, April 1999, pp. 109-120.
20. Bhagwat, M. J., and Leishman, J. G., "Stability, Consistency and Convergence of Time-Marching Free-Vortex Rotor Wake Algorithms," Journal of the American Helicopter Society, Vol. 46, No. 1, Jan. 2001, pp. 59-71.
21. th Annual Forum, Montréal, Canada, June 11-13,2002.
22. nd AIAA Aerospace Sciences Meeting, Reno, NV, Jan. 5-8, 2004.
23. th Annual Forum of the American Helicopter Society International, Montréal Cananda, June 11-13, 2002.
24. th Annual Forum of the American Helicopter Society International, Baltimore, MD, June 7-11, 2004.
25. th Annual Forum of the American Helicopter Society International, Pheonix, AZ, May 6-8, 2003.
26. th Annual Forum, Washington, DC, June 4-6, 1996.
27. Leishman, J. G., "Subsonic Unsteady Aerodynamics Caused by Gusts Using the Indicial Method," Journal of Aircraft, Vol. 33, No. 5, Sept-Oct. 1996, pp. 869-879.
28. Johnson, W., Helicopter Theory, Dover Publications Inc., New York, 1994, Ch. 9 - Rotary Wing Dynamics I, pp. 382 - 393.
29. Leishman, J. G., Principles of Helicopter Aerodynamics, Cambridge University Press, New York, 2000, Ch. 4 Rotating Blade Motion, pp. 128-158.
30. th Annual Forum of the American Helicopter Society International, Baltimore, MD, June 7-10, 2004.
31. Bagai, A., and Leishman, J. G., "Adaptive Grid Sequencing and Interpolation Schemes for Rotor Free-Wake Analyses," AIAA Journal, Vol. 36, No. 9, Sept. 1998, pp. 1593-1602.
32. Howlett, J., "UH-60A BLACK HAWK Engineering Simulation Program: Volume I - Mathematical Model," NASA CR-166309, 1989.
33. th Annual Forum of the American Helicopter Society International, Montréal Canada, June 11-13, 2002.
34. Bhagwat, M. J., and Leishman, J. G., "Stability Analysis of Helicopter Rotor Wakes in Axial Flight," Journal of the American Helicopter Society, Vol. 45, No. 3, 2000, pp. 165-178.
35. th European Rotorcraft Forum, Friedrichshafen, Germany, Sept. 16-18, 2003.
36. Kufeld, R. M., Cross, J. L., and Bousman, W. G., "A Survey of Rotor Loads Distribution in Maneuvering Flight," American Helicopter Society Aeromechanics Specialists Conference, San Francisco, CA, Jan. 19-21, 1994.