Hingeless rotor frequency response with unsteady inflow [PDF]
Hingeless rotor frequency response calculations are obtained by applying a generalized harmonic balance to the elastic blade flapping equations.
Peters, D. A.
core +1 more source
Study of cracks in the last-stage rotor blade of a steam turbine and the corrosion fatigue properties of its materials. [PDF]
HeliyonGao J +6 more
europepmc +1 more source
Reconstruction of a three-dimensional, transonic rotor flow field from holographic interferogram data [PDF]
Holographic interferometry and computerized aided tomography (CAT) are used to determine the transonic velocity field of a model rotor blade in hover. A pulsed ruby laser recorded 40 interferograms with a 2 ft dia view field near the model rotor blade ...
Kittleson, John K., Yu, Yung H.
core +1 more source
Three-dimensional optimization of squealer-tip for a transonic axial-flow compressor rotor blade. [PDF]
HeliyonHeidarian Shahri M +2 more
europepmc +1 more source
Aerodynamic performance of a 1.20-pressure ratio fan stage designed for low noise [PDF]
The aerodynamic design and the overall blade element performance of a 51 centimeter diameter fan stage is presented. The stage was designed to minimize the noise generated by rotor stator interactions. The design pressure ratio was 1.20 at a flow of 30.6
Lewis, G. W., Jr., Moore, R. D.
core +1 more source
Redesigned rotor for a highly loaded, 1800 ft/sec tip speed compressor fan stage 1: Aerodynamic and mechanical design [PDF]
A highly loaded, high tip-speed fan rotor was designed with multiple-circular-arc airfoil sections as a replacement for a marginally successful rotor which had precompression airfoil sections. The substitution of airfoil sections was the only aerodynamic
Halle, J. E., Ruschak, J. T.
core +1 more source
Helicopter rotor wake geometry and its influence in forward flight. Volume 1: Generalized wake geometry and wake effect on rotor airloads and performance [PDF]
An analytic investigation to generalize wake geometry of a helicopter rotor in steady level forward flight and to demonstrate the influence of wake deformation in the prediction of rotor airloads and performance is described.
Egolf, T. A., Landgrebe, A. J.
core +1 more source
Effect of damper on overall and blade-element performance of a compressor rotor having a tip speed of 1151 feet per second and an aspect ratio of 3.6 [PDF]
The overall and blade-element performance of two configurations of a moderately high aspect ratio transonic compressor rotor are presented. The subject rotor has conventional blade dampers.
Hager, R. D., Lewis, G. W.
core +1 more source
Aerodynamic performance optimization of the archimedes spiral wind turbine: combined experimental and CFD analysis of step ratio and blade number effects. [PDF]
Sci RepFaisal AE +5 more
europepmc +1 more source
Research on Tail Rotor Load Test Flight Technology for Helicopters Based on Strain Sensor Measurement. [PDF]
Sensors (Basel)Jiao S, Zheng J, Li K, Hu X.
europepmc +1 more source