Experimental Evaluation of a Flat Wake Theory for Predicting Rotor Inflow-wake Velocities PDF Download
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Author: John C. Wilson
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 62
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Book Description
Author: John C. Wilson
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 62
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Book Description
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729344439
Category :
Languages : en
Pages : 60
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Book Description
The theory for predicting helicopter inflow-wake velocities called flat wake theory was correlated with several sets of experimental data. The theory was developed by V. E. Baskin of the USSR, and a computer code known as DOWN was developed at Princeton University to implement the theory. The theory treats the wake geometry as rigid without interaction between induced velocities and wake structure. The wake structure is assumed to be a flat sheet of vorticity composed of trailing elements whose strength depends on the azimuthal and radial distributions of circulation on a rotor blade. The code predicts the three orthogonal components of flow velocity in the field surrounding the rotor. The predictions can be utilized in rotor performance and helicopter real-time flight-path simulation. The predictive capability of the coded version of flat wake theory provides vertical inflow patterns similar to experimental patterns. Wilson, John C. Langley Research Center...
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722927196
Category :
Languages : en
Pages : 28
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Book Description
A computer code named DOWN was created to implement a flat wake theory for the calculation of rotor inflow and wake velocities. A brief description of the code methodology and instructions for its use are given. The code will be available from NASA's Computer Software Management and Information Center (COSMIC). Wilson, John C. Langley Research Center RTOP 505-59-36-01...
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 836
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 548
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 340
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 474
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Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 72
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