Wind-tunnel evaluation of an advanced main-rotor blade design for a utility-class helicopter [PDF]
An investigation was conducted in the Langley Transonic Dynamics Tunnel to evaluate differences between an existing utility-class main-rotor blade and an advanced-design main-rotor blade.
Cramer, Robert G., Jr. +4 more
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Unsteady flows in axial turbomachines [PDF]
, 1957 Of the various unsteady flows that occur in axial turbomachines certain asymmetric disturbances, of wave length large in comparison with blade spacing, have become understood to a certain extent.
Marble, Frank E., Rannie, W. Duncan
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Performance of an optimized rotor blade at off-design flight conditions [PDF]
An investigation is made of the dynamic and aerodynamic performance of a helicopter rotor previously optimized for minimum 4/rev vertical shear and blade weight subject to certain dynamic and structural constraints.
Chattopadhyay, Aditi
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Surface pressure measurements at two tips of a model helicopter rotor in hover [PDF]
Surface pressures were measured near the tip of a hovering single-bladed model helicopter rotor with two tip shapes. The rotor had a constant-chord, untwisted blade with a square, flat tip which could be modified to a body-of-revolution tip.
Gray, R. B. +3 more
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Analytical investigation of blade efficiency for two-dimensional supersonic turbine rotor blade sections [PDF]
Blade efficiency in producing vortex flow within two dimensional supersonic rotor blade ...
Goldman, L. J.
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Laminaria hyperborea as a Source of Valuable Glyceroglycolipids—A Characterization of Galactosyldiacilglycerols in Stipe and Blade by HPLC-MS/MS [PDF]
, 2022 Lena Foseid +3 more
openalex +1 more source
Dynamic analysis of a pre-and-post ice impacted blade [PDF]
The dynamic characteristics of an engine blade are evaluated under pre-and-post ice impact conditions using the NASA in-house computer code BLASIM. The ice impacts the leading edge of the blade causing severe local damage.
Abumeri, G. H. +3 more
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A flight investigation of blade section aerodynamics for a helicopter main rotor having NLR-1T airfoil sections [PDF]
A flight investigation was conducted using a teetering-rotor AH-1G helicopter to obtain data on the aerodynamic behavior of main-rotor blades with the NLR-1T blade section.
Morris, C. E. K., Jr. +2 more
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FORTRAN 4 program calculates velocities and streamlines in a tandem blade turbomachine [PDF]
, 1969 Computer program gives blade-to-blade solution of the two-dimensional, subsonic, compressible, nonviscous flow problem for a circular or straight infinite cascade of tandem or slotted turbomachine blades.
Katsanis, T., Mcnally, W. D.
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