Numerical solutions of the linearized Euler equations for unsteady vortical flows around lifting airfoils [PDF]
A linearized unsteady aerodynamic analysis is presented for unsteady, subsonic vortical flows around lifting airfoils. The analysis fully accounts for the distortion effects of the nonuniform mean flow on the imposed vortical disturbances.
Atassi, Hafiz M., Scott, James R.
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STOL aircraft transient ground effects. Part 1: Fundamental analytical study [PDF]
The first phases of a fundamental analytical study of STOL ground effects were presented. Ground effects were studied in two dimensions to establish the importance of nonlinear effects, to examine transient aspects of ascent and descent near the ground ...
Crowder, J. P. +2 more
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The effect of blade aerodynamic modelling on the prediction of high-frequency rotor airloads [PDF]
, 2009 Interactions between the blades and vortical structures within the wake of a helicopter rotor are a significant source of impulsive loading and noise, particularly in descending flight.
Brown, Richard, Kelly, Mary E.
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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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Aerodynamic sensitivities from subsonic, sonic and supersonic unsteady, nonplanar lifting-surface theory [PDF]
The technique of implicit differentiation has been used in combination with linearized lifting-surface theory to derive analytical expressions for aerodynamic sensitivities (i.e., rates of change of lifting pressures with respect to general changes in ...
Yates, E. Carson, Jr.
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Unsteady transonic flow calculations for two-dimensional canard-wing configurations with aeroelastic applications [PDF]
Unsteady transonic flow calculations for aerodynamically interfering airfoil configurations are performed as a first step toward solving the three dimensional canard wing interaction problem.
Batina, J. T.
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User's Guide for a Modular Flutter Analysis Software System (Fast Version 1.0) [PDF]
The use and operation of a group of computer programs to perform a flutter analysis of a single planar wing are described. This system of programs is called FAST for Flutter Analysis System, and consists of five programs.
Bennett, R. M., Desmarais, R. N.
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Application of a nonisentropic full potential method to AGARD standard airfoils [PDF]
An entropy-correction method for the unsteady full potential equation is presented. The unsteady potential equation is modified to model the entropy jumps across shock waves.
Whitlow, Woodrow, Jr.
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Grasping extreme aerodynamics on a low-dimensional manifold. [PDF]
Nat Commun, 2023 Fukami K, Taira K.
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Application of theory to propeller design [PDF]
The various theories concerning propeller design are discussed. The use of digital computers to obtain specific blade shapes to meet appropriate flow conditions is emphasized. The development of lifting-line and lifting surface configurations is analyzed.
Cox, G. G., Morgan, W. B.
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