Spectral characteristics of rotor blade/vortex interaction noise
β Scribed by MARTIN, RUTH M.; HARDIN, JAY C.
- Book ID
- 118033618
- Publisher
- American Institute of Aeronautics and Astronautics
- Year
- 1988
- Tongue
- English
- Weight
- 807 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0021-8669
- DOI
- 10.2514/3.45542
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π SIMILAR VOLUMES
Blade}vortex interaction noise-generated by helicopter main rotor blades is one of the most severe noise problems and is very important both in military applications and community acceptance of rotorcraft. Research over the decades has substantially improved physical understanding of noise-generatin
An analysis is made of the sound produced when a rectilinear vortex is cut by a spring-restrained, rigid airfoil. The airfoil has rectangular planform of large aspect ratio, and can execute small amplitude translational oscillations in the lift direction under the influence of a linear, elastic rest
An analytical treatment is given of the canonical problem of the generation of sound when a locally rectilinear vortex is drawn through the clearance gap between a wall and the square tip of a rigid blade at low Mach number. The mean flow in the neighborhood of the blade tip is assumed to be locally