Research Catalog
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Displaying 1-31 of 31 results
Forward sweep, low noise rotor blade [microform] / inventor, Thomas F. Brooks.
- Text
- [Washington, DC : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
- 1994
Flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise predictions [microform] / principle investigators: William J. Devenport, Stewart A.L. Glegg.
- Text
- [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1994]
- 1994
A parametric study of transonic blade-vortex interaction noise [microform] / A.S. Lyrintzis, Y. Xue ; principal investigator A.S. Lyrintzis.
- Text
- [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1991]
- 1991
Lift distribution and velocity field measurements for a three-dimensional, steady blade/vortex interaction [microform] / Stephen E. Dunagan, Thomas R. Norman.
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; [Springfield, Va. : For sale by the National Technical Information Service, 1987]
- 1987
Evaluation of a doubly-swept blade tip for rotorcraft noise reduction [microform] / Brian E. Wake and T. Alan Egolf.
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1992]
- 1992
Flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise predictions [microform] : semi-annual report to NASA Langley for worked performed under the grant / principal investigators: William J. Devenport, Stewart A.L. Glegg.
- Text
- [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1995]
- 1995
An analysis of blade vortex interaction aerodynamics and acoustics [microform] / by Duck Joo Lee.
- Text
- Stanford, CA : Stanford University, Dept. of Aeronautics and Astronautics : Joint Institute for Aeronautics and Acoustics ; [Springfield, Va. : National Technical Information Service, distributor, 1985]
- 1985
Experimental and computational investigation of the tip clearance flow in a transonic axial compressor rotor [microform] / Kenneth L. Suder and Mark L. Celestina.
- Text
- [Washington, DC] : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
- 1995
Reduction of Blade-Vortex Interaction (BVI) noise through X-force control [microform] / Fredric H. Schmitz.
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
- 1995
Reynolds-averaged Navier-Stokes studies of low Reynolds number effects on the losses in a low pressure turbine [microform] / Daniel J. Dorney.
- Text
- [Washington, DC] : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
- 1996
The spectral and statistical properties of turbulence generated by a vortex/blade-tip interaction [microform] : final technical report ... / William J. Devenport, principal investigator; Kenneth S. Wittmer; Christian W. Wenger.
- Text
- Blacksburg, VA : Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University ; [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1997]
- 1997
Helicopter blade-vortex interaction noise with comparisons to CFD calculations [microform] / Megan S. McCluer.
- Text
- [Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
- 1996
New computational methods for the prediction and analysis of helicopter noise [microform] / Roger C. Strawn, Leonid Oliker, Rupak Biswas.
- Text
- [Moffett Field, Calif.] : Research Institute for Advanced Computer Science, NASA Ames Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
- 1996
Blade-mounted flap control for BVI noise reduction proof-of-concept test [microform] / Seth Dawson ... [et al].
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
- 1995
Reduction of helicopter blade-vortex interaction noise by active rotor control technology [microform] / Yung H. Yu ... [et al.].
- Text
- [Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1997]
- 1997
Acoustic flight tests of rotorcraft noise-abatement approaches using local differential GPS guidance [microform] / Robert T.N. Chen, William S. Hindson, and Arnold W. Mueller.
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
- 1995
Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Mod1/HIRES [microform] : methodology and users' manual / D. Douglas Boyd, Jr. ... [et al.].
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1998]
- 1998
Predicted aerodynamic characteristics of a NACA 0015 airfoil having a 25% integral-type trailing edge flap [microform] / Ahmed Hassan.
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1999]
- 1999
Helicopter rotor blade computation in unsteady flows using moving overset grids [microform] / Jasim Ahmad and Earl P.N. Duque.
- Text
- Washington, DC : American Institute of Aeronautics and Astronautics : [National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
- 1996
Full-potential modeling of blade-vortex interactions [microform] / Henry E. Jones.
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1997]
- 1997
Preliminary study of a model rotor in descent [microform] / K.W. McAlister ... [et al.].
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; Hanover, MD : Available from NASA Center for AeroSpace Information, [2000]
- 2000
Extension of a three-dimensional viscous wing flow analysis [microform] / Bernard C. Weinberg ... [et al.].
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center, [1990]
- 1990
- 1 Resource
Available Online
http://purl.access.gpo.gov/GPO/LPS68268Airloads, wakes, and aeroelasticity [microform] / Wayne Johnson.
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center, [1990]
- 1990
- 1 Resource
Available Online
http://purl.access.gpo.gov/GPO/LPS69236Review and analysis of the DNW/model 360 rotor acoustic data base [microform] / R.A. Zinner and D.A. Boxwell, R.H. Spencer.
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center : US Army Aviation Systems Command, Aviation Research and Technology Activity ; [Springfield, Va. : For sale by the National Technical Information Service, 1989]
- 1989
- 1 Resource
Available Online
http://purl.access.gpo.gov/GPO/LPS72232Experimental blade vortex interaction noise characteristics of a utility helicopter at 1/4 scale [microform] / David A. Conner and Danny R. Hoad.
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [St. Louis, Mo. : United States Army Aviation Research and Development Command, 1984]
- 1984
Helicopter model rotor-blade vortex interaction impulsive noise [microform] : scalability and parametric variations / W.R. Splettstoesser ... [et al.].
- Text
- Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; St. Louis, Mo. : United States Army Aviation Systems Command, [1984]
- 1984
- 1 Resource
Available Online
http://purl.access.gpo.gov/GPO/LPS101194Reduction of blade-vortex interaction noise using higher harmonic pitch control / Thomas F. Brooks ... [and others].
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; US Army Aviation Systems Command, Aviation R & T Activity, [1989]
- 1989
- 1 Resource
Available Online
https://purl.fdlp.gov/GPO/LPS108702Reduction of blade-vortex interaction noise using higher harmonic pitch control [microform] / Thomas F. Brooks ... [et al.].
- Text
- Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; US Army Aviation Systems Command, Aviation R & T Activity, [1989]
- 1989
Acoustic measurements from a rotor blade-vortex interaction noise experiment in the German-Dutch wind tunnel (DNW) / R.M. Martin [and three others].
- Text
- Washington, DC : National Aeronautics and Space Administration, Scientific and Technical Information Division, 1988.
- 1988
- 1 Resource
Available Online
https://purl.fdlp.gov/GPO/gpo41606Acoustic measurements from a rotor blade-vortex interaction noise experiment in the German-Dutch wind tunnel (DNW) / R.M. Martin [and three others].
- Text
- Washington, DC : National Aeronautics and Space Administration, Scientific and Technical Information Division, 1988.
- 1988
Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Modl/HIRES : methodology and users' manual / D. Douglas Boyd, Jr. [and three others].
- Text
- Hampton, Virginia : National Aeronautics and Space Administration, Langley Research Center, March 1998.
- 1998-3
- 1 Resource
Available Online
https://purl.fdlp.gov/GPO/gpo82973
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