Evaluation of Helicopter Noise Due to Blade-vortex Interaction for Five Tip Configurations

Evaluation of Helicopter Noise Due to Blade-vortex Interaction for Five Tip Configurations PDF Author: Danny R. Hoad
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 84

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Evaluation of Helicopter Noise Due to Blade-vortex Interaction for Five Tip Configurations

Evaluation of Helicopter Noise Due to Blade-vortex Interaction for Five Tip Configurations PDF Author: Danny R. Hoad
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 84

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Evaluation of Helicopter Noise Due to B Blade-vortex Interaction for Five Tip Configurations

Evaluation of Helicopter Noise Due to B Blade-vortex Interaction for Five Tip Configurations PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 84

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Impulsive Noise Due to Transonic Blade-vortex Interactions

Impulsive Noise Due to Transonic Blade-vortex Interactions PDF Author: Shyue-bin Chang
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 354

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Rotorcraft Blade-vortex Interaction Noise Reduction Through Attitude and Flight Parameter Variations

Rotorcraft Blade-vortex Interaction Noise Reduction Through Attitude and Flight Parameter Variations PDF Author: Juan Abelló
Publisher:
ISBN:
Category :
Languages : en
Pages : 466

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Wake Geometry Effects on Rotor Blade-vortex Interaction Noise Directivity

Wake Geometry Effects on Rotor Blade-vortex Interaction Noise Directivity PDF Author: Ruth McVoy Martin
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 32

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Blade-vortex Interaction Noise Generation and Directionality

Blade-vortex Interaction Noise Generation and Directionality PDF Author: Wel-Chong Sim
Publisher:
ISBN:
Category :
Languages : en
Pages : 360

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The Directionality of Blade-vortex Interaction Noise

The Directionality of Blade-vortex Interaction Noise PDF Author: Todd Darwin Ringler
Publisher:
ISBN:
Category :
Languages : en
Pages : 332

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Helicopter Blade-vortex Interaction Locations

Helicopter Blade-vortex Interaction Locations PDF Author: Danny R. Hoad
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 112

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Full-Potential Modeling of Blade-Vortex Interactions

Full-Potential Modeling of Blade-Vortex Interactions PDF Author: Henry E. Jones
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 96

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A study of the full-potential modeling of a blade-vortex interaction was made. A primary goal of this study was to investigate the effectiveness of the various methods of modeling the vortex. The model problem restricts the interaction to that of an infinite wing with an infinite line vortex moving parallel to its leading edge. This problem provides a convenient testing ground for the various methods of modeling the vortex while retaining the essential physics of the full three-dimensional interaction. A full-potential algorithm specifically tailored to solve the blade-vortex interaction (BVI) was developed to solve this problem. The basic algorithm was modified to include the effect of a vortex passing near the airfoil. Four different methods of modeling the vortex were used: (1) the angle-of-attack methods, (2) the lifting-surface method, (3) the branch-cut method, and (4) the split-potential method. A side-by-side comparison of the four models was conducted. these comparisons included comparing generated velocity fields, a subcritical interaction, and a critical interaction. The subcritical and critical interactions are compared with experimentally generate results. The split-potential model was used to make a survey of some of the more critical parameters which affect the BVI.

An Analysis of Blade Vortex Interaction Aerodynamics and Acoustics

An Analysis of Blade Vortex Interaction Aerodynamics and Acoustics PDF Author: Duck Joo Lee
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 190

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