Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbine Blades
, 2014 This paper presents an aeroservoelastic modeling approach for dynamic load alleviation in large wind turbines with trailing-edge aerodynamic surfaces. The tower, potentially on a moving base, and the rotating blades are modeled using geometrically non ...
Bossanyi E. A. +17 more
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Subsonic flutter analysis addition to NASTRAN [PDF]
, 1973 A subsonic flutter analysis capability has been developed for NASTRAN, and a developmental version of the program has been installed on the CDC 6000 series digital computers at the Langley Research Center.
Doggett, R. V., Jr., Harder, R. L.
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Developments in steady and unsteady aerodynamics for use in aeroelastic analysis and design [PDF]
A review is given of seven research projects which are aimed at improving the generality, accuracy, and computational efficiency of steady and unsteady aerodynamic theory for use in aeroelastic analysis and design.
Bland, S. R., Yates, E. C., Jr.
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Measured unsteady transonic aerodynamic characteristics of an elastic supercritical wing with an oscillating control surface [PDF]
Transonic steady and unsteady aerodynamic data were measured on a large elastic wing in the NASA Langley Transonic Dynamics Tunnel. The wing had a supercritical airfoil shape and a leading-edge sweepback of 28.8 deg.
Brooks J. D. +7 more
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Lifting surface theory for a helicopter rotor in forward flight [PDF]
, 1984 A lifting surface theory was developed for a helicopter rotor in forward flight for compressible and incompressible flow. The method utilizes the concept of the linearized acceleration potential and makes use of the vortex lattice procedure. Calculations
Runyan, H. L., Tai, H.
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Unsteady transonic flow calculations for interfering lifting surface configurations [PDF]
Unsteady transonic flow calculations are presented for aerodynamically interfering lifting surface configurations. Calculations are performed by extending the XTRAN3S (Version 1.5) unsteady transonic small-disturbance code to allow the treatment of an ...
Batina, J. T.
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Calculation of viscous effects on transonic flow for oscillating airfoils and comparisons with experiment [PDF]
A method is described for calculating unsteady transonic flow with viscous interaction by coupling a steady integral boundary-layer code with an unsteady, transonic, inviscid small-disturbance computer code in a quasi-steady fashion. Explicit coupling of
Bland, Samuel R., Howlett, James T.
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Finite difference modeling of rotor flows including wake effects [PDF]
Rotary wing finite difference methods are investigated. The main concern is the specification of boundary conditions to properly account for the effect of the wake on the blade.
Caradonna, F. X., Desopper, A., Tung, C.
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A finite-difference, frequency-domain numerical scheme for the solution of the linearized unsteady Euler equations [PDF]
A numerical method is developed for solving periodic, three-dimensional, vortical flows around lifting airfoils in subsonic flow. The first-order method, that is presented, fully accounts for the distortion effects of the nonuniform mean flow on the ...
Atassi, Hafiz M., Scott, James R.
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Integral-equation methods in steady and unsteady subsonic, transonic and supersonic aerodynamics for interdisciplinary design [PDF]
Progress in the development of computational methods for steady and unsteady aerodynamics has perennially paced advancements in aeroelastic analysis and design capabilities. Since these capabilities are of growing importance in the analysis and design of
Yates, E. Carson, Jr.
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