Fluid dynamics of interacting blade tip vortices with a ground plane

Annual Forum Proceedings - AHS International

Volumn 2, Issue , 2008, Pages 1231-1248

  Lee, Timothy E ^a   Leishman, J Gordon ^a   Ramasamy, Manikandan ^a  

^a UNIVERSITY OF MARYLAND   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BLADE TIPS; DIGITAL PARTICLE IMAGE VELOCIMETRY; DYNAMIC FEATURES; GROUND PLANE; INTERACTION PROCESSES; ND : YAG LASERS; ROTATIONAL FREQUENCIES; ROTOR POWER; ROTOR RADIUS; ROTOR WAKES; TIME-AVERAGED; TIP VORTICES; TURBULENCE GENERATION; VORTEX STRETCHING; WALL JETS;

DIFFUSION; DYNAMICS; EXPERIMENTS; FLOW CONTROL; FLOW INTERACTIONS; FLOW VISUALIZATION; FLUID DYNAMICS; FLUID MECHANICS; GROUND OPERATIONS; INDUSTRIAL MANAGEMENT; JETS; NEODYMIUM; SEMICONDUCTOR DOPING; TURBULENCE; VISUALIZATION; VORTEX FLOW; WAKES; WALLS (STRUCTURAL PARTITIONS);

MILITARY OPERATIONS;

EID: 50049104398     PISSN: 15522938     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (34)

1. Küssner, H. G., "Helicopter Problems," NACA TM 827, January 1937.
2. Zbrozek, J., "Ground Effect on the Lifting Rotor," British ARC R & M 2347, 1947.
3. Betz, A., "The Ground Effect on Lifting Propellers," NACA TM 836, 1937.
4. Knight, M. and Hefner, R. A., "Analysis of Ground Effect on the Lifting Airscrew," NACA TN 835, 1941.
5. Cheeseman, I. C. and Bennett, W. E., "The Effect of the Ground on a Helicopter Rotor in Forward Flight," ARC R & M 3021, 1955.
6. Fradenburgh, E. A., "The Helicopter and the Ground Effect Machine," Journal of the American Helicopter Society, Vol. 5, (4), 1960, pp. 26-28.
7. Fradenburgh, E. A., "Aerodynamic Factors Influencing Overall Hover Performance," AGARD-CP-111, 1972.
8. Stepniewski, W. Z. and Keys, C. N., Rotary-Wing Aerodynamics, Dover Publications, New York, NY. Part II, Chapters 2 and 3, 1984.
9. Prouty, R. W., "Ground Effect and the Helicopter," AIAA Paper 85-4034, AIAA/AHS/ASEE Aircraft Design Systems and Operations Meeting, Colorado Springs, CO, October 14-16, 1985.
10. Hayden, J. S., "The Effect of the Ground on Helicopter Hovering Power Required," 32th Annual National V/STOL Forum of the American Helicopter Society, Washington DC, May 10-12, 1976.
11. Lewis, R. B., "Army Helicopter Performance Trends," Journal of the American Helicopter Society, Vol. 17, (2), 1972, pp. 15-23.
12. Taylor, M. K., "A Balsa-Dust Technique for Air-Flow Visualization and Its Application to Flow through Model Helicopter Rotors in Static Thrust," NACA Technical Note 2220, 1950.
13. Curtiss, H. C., Sun, M., Putman, W. F., and Hanker, E. J., "Rotor Aerodynamics in Ground Effect at Low Advance Ratios," Journal of the American Helicopter Society, Vol. 29, (1), 1984, pp. 48-55.
14. Curtiss, H. C., Erdman, W., and Sun, M., "Ground Effect Aerodynamics," Vertica, 11 (1/2), 1987, pp. 29-42.
15. Light, J. S. and Norman, T., "Tip Vortex Geometry of a Hovering Helicopter Rotor in Ground Effect," 45th Annual Forum of the American Helicopter Society, Boston, MA, May 22-24, 1989.
16. Ganzer, V M. and Rae, W. H., "An Experimental Investigation of the Effect of Wind Tunnel Walls on the Aerodynamic Performance of a Helicopter Rotor," NASA TN D-415, 1960.
17. Lehman, A. F. and Besold, J. A., "Test Section Size Influence on Model Helicopter Rotor Performance," USAAVLABS TR 71-6, 1971.
18. ROSSOW, V J., "Effect of Ground and/or Ceiling Planes on Thrust of Rotors in Hover," NASA Technical Memorandum 86754, 1985.
19. DuWaldt, F. A., "Wakes of Lifting Propellers (Rotors) in-ground-effect," Cornell Aeronautical Laboratory, Report CAL No. BB-1665-S-3, November 1966.
20. Saberi, H. A. and Maisel, M. D., "A Free-Wake Rotor Analysis Including Ground Effect," 43rd Annual Forum of the American Helicopter Society, St. Louis, MO, May 18-20, 1987.
21. Quackenbush, T. R. and Wachspress, D. A., "Enhancements to a New Free Wake Hover Analysis," NASA CR 177523, April 1989.
22. Graber, A., Rosen, A., and Seginer, A., "An Investigation of a Hovering Rotor in Ground Effect," Proceedings of the 16th European Rotorcraft Forum, Glasgow, September 18-20, 1990.
23. Itoga, N., Nagashima, T., Iboshi, N., Kawakami, S., Prasad, J. V R., and Peters, D. A., "Numerical Analysis of Ground Effect for a Lifting Rotor Hovering at Close Proximity to Inclined Flat Surface," American Helicopter Society Specialists' Meeting on Advanced Helicopter Technology and Disaster Relief, Gifu, Japan, April 21-23, 1999.
24. Griffiths, D. A., Ananthan, S., and Leishman, J. G., "Predictions of Rotor Performance in Ground Effect Using a Free-Vortex Wake Model, Journal of the American Helicopter Society, Vol. 49, (3), October 2005.
25. Moulton, M., O'Malley, J. A., and Ranjagopalan, G., "Rotorwash Prediction Using an Applied Computational Fluid Dynamics Tool," 60th Annual Form of the American Helicopter Society, Baltimore, MD, June 7-10, 2004.
26. Brown, R. and Whitehouse, G., "Modelling Rotor Wakes in Ground Effect," Journal of the American Helicopter Society, Vol. 49, (3), October 2004, pp. 238-249.
27. Philips, C., and Brown, R., "Eulerian Simulation of the Fluid Dynamics of Helicopter Brownout," 64th Annual Forum Proceedings of the American Helicopter Society International, Montréal Canada, April 29-May 1, 2008.
28. Leishman, J. G., "On Seed Particle Dynamics in Tip Vortex Flows," Journal of Aircraft, Vol. 33, (4), July/August 1996, pp. 823-825.
29. Scarano, F., "Iterative Image Deformation Methods in PIV," Measurement Science and Technology, Vol. 13, 2002, pp. R1-R19.
30. 30Ramasamy, M., and Leishman, J. G., Benchmarking Particle Image Velocimetry with Laser Doppler Velocimetry for Rotor Wake Measurements, AIAA Journal, Vol. 45, (11), November 2007, pp. 2622-2633.
31. Bhagwat, M. J. and Leishman, J. G., "Stability Analysis of Helicopter Rotor Wakes in Axial Flight, Journal of the American Helicopter Society, Vol. 45, (3), July 2000, pp. 165-178.
32. Ananthan, S., Leishman, J. G., and Ramasamy, M., "The Role of Filament Stretching in the Free-Vortex Modeling of Rotor Wakes," American Helicopter Society 58th Annual National Forum, Montréal, Canada, June 11-13, 2002.
33. Ramasamy, M., and Leishman, J. G., "The Interdependence of Straining and Viscous Diffusion Effetcs on Vorticity in Rotor Flow Fields," American Helicopter Society 59th Annual National Forum Phoenix, Arizona, May 6-8 2003.
34. Leishman, J. G., "On the Aperiodicity of Helicopter Rotor Wakes, Experiments in Fluids, Vol. 25, 1998, pp. 352-361.