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Author:
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ISBN:
Category : Astronautics
Languages : en
Pages : 628
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Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 628
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Book Description
Author: Harvey H. Hubbard
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ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 616
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 458
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Author: F. H. Schmitz
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Category :
Languages : en
Pages : 110
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Book Description
The theoretical and experimental status of helicopter impulsive noise is reviewed. The two major source mechanisms of helicopter impulsive noise are addressed: high-speed impulsive noise and blade-vortex interaction impulsive noise. A thorough physical explanation of both generating mechanisms is presented together with model and full-scale measurements of the phenomena. Current theoretical prediction methods are compared with experimental findings of isolated rotor tests. The noise generating mechanisms of high speed impulsive noise are fairly well understood - theory and experiment compare nicely over Mach number ranges typical of today's helicopters. For the case of blade-vortex interaction noise, understanding of noise generating mechanisms and theoretical comparison with experiment are less satisfactory. Several methods for improving theory-experiment are suggested.
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 216
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Author:
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ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 476
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Author:
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ISBN:
Category :
Languages : en
Pages : 262
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Book Description
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 262
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Book Description
