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| Author | : Cornell Aeronautical Laboratory |
| Publisher | : |
| Total Pages | : 134 |
| Release | : 1963 |
| Genre | : Vertically rising aircraft |
| ISBN | : |
| Author | : W. Gordon Brady |
| Publisher | : |
| Total Pages | : 102 |
| Release | : 1964 |
| Genre | : |
| ISBN | : |
The results of an experimental investigation of the flow under a normally impinging nonuniform jet are presented. The jet velocity profile was designed to be representative of rotors and ducted fans. The jet was tested at distances from the ground of 4, 2, and 1/2 nozzle diameters. An approximate analysis which uses an empirical relation for radial mass flow near the ground is used to calculate the properties of the flow along the ground at radii large enough so that the pressure gradient is approximately zero. A method of calculating the properties of the flow in an inviscid, normally impinging, uniform jet has been formulated. The formulation is applicable for all distances between the jet nozzle and the ground. Solutions have been obtained for jets at nozzle-to-ground distances of 1/4 and 1 jet diameters. The mathematical model used was based on a vortex-sheet representation, and solutions were obtained by means of an iterative technique using an IBM 704 digital computer. Good agreement was obtained with experimental ground-plane and jet-centerline pressure distributions, and with nozzle-exit velocity profiles.
| Author | : William Gordon Brady |
| Publisher | : |
| Total Pages | : 27 |
| Release | : 1963* |
| Genre | : Downwash (Aerodynamics) |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 120 |
| Release | : 1963 |
| Genre | : |
| ISBN | : |
A theoretical and experimental study was made to investigate the flow characteristics of circular uniform jets impinging normally on a ground plane in order to further the understanding of the aerodynamic processes associated with ground particle entrainment in the impinging downwash of VTOL aircraft. Particular emphasis was placed on the flow properties in the ground-plane boundary layer where entrainment occurs.
| Author | : William Gordon Brady |
| Publisher | : |
| Total Pages | : 110 |
| Release | : 1965 |
| Genre | : Aerodynamics |
| ISBN | : |
Work is reported on a continuation of the experimental study of the two-dimensional wing in a three-dimensional sheared flow and also treats the theory of two-dimensional nonuniform sheared flows in an attempt to determine the mechanism responsible for the marked changes in airfoil stall characteristics which were demonstrated experimentally in Reference 3. It was felt desirable to complete the three-dimensional experimental program before resuming experimental work with two-dimensional nonuniform sheared flows. The experimental wing data obtained are presented and compared, where possible, with relevant two-dimensional data and with theory.
| Author | : |
| Publisher | : |
| Total Pages | : 60 |
| Release | : 1979 |
| Genre | : Science |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 780 |
| Release | : |
| Genre | : Science |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 212 |
| Release | : 1967 |
| Genre | : Aircraft gas-turbines |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 728 |
| Release | : 1994 |
| Genre | : Aeronautics |
| ISBN | : |
| Author | : Foster-Miller Associates |
| Publisher | : |
| Total Pages | : 122 |
| Release | : 1973 |
| Genre | : Excavation |
| ISBN | : |
