Author: Danny R. Hoad
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 84
Book Description
Evaluation of Helicopter Noise Due to Blade-vortex Interaction for Five Tip Configurations
Author: Danny R. Hoad
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 84
Book Description
Evaluation of Helicopter Noise Due to B Blade-vortex Interaction for Five Tip Configurations
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Impulsive Noise Due to Transonic Blade-vortex Interactions
Author: Shyue-bin Chang
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 354
Book Description
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 354
Book Description
Rotorcraft Blade-vortex Interaction Noise Reduction Through Attitude and Flight Parameter Variations
Author: Juan Abelló
Publisher:
ISBN:
Category :
Languages : en
Pages : 466
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 466
Book Description
Wake Geometry Effects on Rotor Blade-vortex Interaction Noise Directivity
Author: Ruth McVoy Martin
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 32
Book Description
Blade-vortex Interaction Noise Generation and Directionality
Author: Wel-Chong Sim
Publisher:
ISBN:
Category :
Languages : en
Pages : 360
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 360
Book Description
The Directionality of Blade-vortex Interaction Noise
Author: Todd Darwin Ringler
Publisher:
ISBN:
Category :
Languages : en
Pages : 332
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 332
Book Description
Helicopter Blade-vortex Interaction Locations
Author: Danny R. Hoad
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 112
Book Description
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 112
Book Description
Full-Potential Modeling of Blade-Vortex Interactions
Author: Henry E. Jones
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 96
Book Description
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.
Publisher:
ISBN:
Category : Unsteady flow (Aerodynamics)
Languages : en
Pages : 96
Book Description
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
Author: Duck Joo Lee
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 190
Book Description
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 190
Book Description