Experimental Blade Vortex Interaction Noise Characteristics of a Utility Helicopter at 1/4 Scale PDF Download
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Author:
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Category :
Languages : en
Pages : 280
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Author:
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Category :
Languages : en
Pages : 280
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Category : Astronautics
Languages : en
Pages : 532
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Category : Aeronautics
Languages : en
Pages : 704
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Author: Danny R. Hoad
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Category :
Languages : en
Pages : 112
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The results of a model rotor acoustic test in the Langley 4- by 7-Meter Tunnel are used to evaluate a free-wake analytical technique. An acoustic triangulation technique is used to locate the position in the rotor disk where the blade-vortex interaction noise originates. These locations, along with results of the rotor free-wake analysis, are used to define the geometry of the blade-vortex interaction noise phenomena as well as to determine if the free-wake analysis is a capable diagnostic tool. Data from tests of two teetering rotor systems are used in these analyses. Keywords; Helicopter rotor disks; Free wake; Blade-vortex interactions; Acoustic properties.
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Category : Aeronautics
Languages : en
Pages : 416
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Author: Danny R. Hoad
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Category : Rotors (Helicopters)
Languages : en
Pages : 112
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Category : Aeronautics
Languages : en
Pages : 178
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Category : Shock (Mechanics)
Languages : en
Pages : 594
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Author:
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Category : Aeronautics
Languages : en
Pages : 700
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Category : Government reports announcements & index
Languages : en
Pages : 1000
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