Blade-mounted trailing edge flap control for BVI noise reduction [PDF]
Numerical procedures based on the 2-D and 3-D full potential equations and the 2-D Navier-Stokes equations were developed to study the effects of leading and trailing edge flap motions on the aerodynamics of parallel airfoil-vortex interactions and on ...
Charles, B. D. +3 more
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Effect of Aerodynamic Blade Change of Two-Stage Axial Subsonic Turbine on Design Point [PDF]
International Journal of Advanced Design and Manufacturing Technology, 2019 In this research for reducing the effect of losses and increasing the efficiency, the bowing in the rotor and stator blades is used. In one mode rotor blades are curved and in other one, stator blades are curved.
Mahmood Adami +2 more
doaj
Analysis of selected problems involving vortical flows [PDF]
Three selected problems involving vortical flows are analyzed and discussed including: the trailing vortex behind a wing; rotor blade-vortex interaction; and the leading edge vortex on a flat ...
Lee, D. J., Mourtos, N. J., Roberts, L.
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Optical measurement of propeller blade deflections [PDF]
A nonintrusive optical method for measurement of propeller blade deflections is described and evaluated. It does not depend on the reflectivity of the blade surface but only on its opaqueness.
Kurkov, Anatole P.
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Variable camber rotor study [PDF]
Deployment of variable camber concepts on helicopter rotors was analytically assessed. It was determined that variable camber extended the operating range of helicopters provided that the correct compromise can be obtained between performance/loads gains
Cowan, J., Dadone, L., Mchugh, F. J.
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Application of holography to flow visualization within rotating compressor blade row [PDF]
Two holographic interblade row flow visualization systems were designed to determine the three-dimensional shock patterns and velocity distributions within the rotating blade row of a transonic fan rotor, utilizing the techniques of pulsed laser ...
Heflinger, L. O. +3 more
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Thermal fatigue and oxidation data for directionally solidified MAR-M 246 turbine blades [PDF]
Thermal fatigue and oxidation data were obtained for 11 plasma spray coated and 13 uncoated directionally solidified and single crystal MAR-M 246 blades.
Hill, V. L., Humphreys, V. E.
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Comparison of calculated and experimental cascade performance for controlled-diffusion compressor stator blading [PDF]
, 1986 The mid-span section of a previously reported controlled-diffusion compressor stator has been experimentally evaluated in cascade. Measurements are taken over a range of incidence angles for blade chord Reynolds numbers from 470,000 to 690,000.
Sanger, N. L., Shreeve, R. P.
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Study of casing treatment stall margin improvement phenomena [PDF]
The results of a program of experimental and analytical research in casing treatments over axial compressor rotor blade tips are presented. Circumferential groove, axial-skewed slot, and blade angle slot treatments were tested.
Hilvers, D. E. +2 more
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Prediction of rotating-blade vortex noise from noise of nonrotating blades [PDF]
Measurements were conducted in an acoustic wind tunnel to determine vortex noise of nonrotating circular cylinders and NACA 0012 airfoils. Both constant-width and spanwise tapered models were tested at a low turbulence level.
Amiet, R. K. +2 more
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