Journal ArticleDOI
Aerodynamics and Acoustics of Rotor Blade-Vortex Interactions
Yung H. Yu,Chee Tung,Judith Gallman,Klaus J. Schultz,Berend G. van der Wall,Pierre Spiegel,Bertrand Michea +6 more
Reads0
Chats0
TLDR
In this paper, the authors compare rotor blade loading, wake geometry, blade motion and noise radiation in the DNW with rotor simulation codes of different organizations, and validate the results against experimental data obtained from different organizations.Abstract:
Helicopter rotor simulation codes of different organizations are validated against experimental data obtained in the DNW. The comparison addresses rotor blade loading, wake geometry, blade motion and noise radiation. Although specific differences exist the general prediciton of rotor noise is reasonably well.read more
Citations
More filters
Journal ArticleDOI
Rotor blade–vortex interaction noise
TL;DR: In this paper, the authors investigated different design concepts to reduce the blade-tip interaction noise and vibration by diffusing tip vortices, but these tip shapes have not been able to substantially reduce blade-vortex interaction noise without degradation of rotor performance.
Journal ArticleDOI
Review of Rotor Loads Prediction with the Emergence of Rotorcraft CFD
TL;DR: In this paper, the authors reviewed the capabilities and limitations of current CFD analyses to capture the key aerodynamic phenomena driving critical rotor loads: wake, dynamic stall and tip transonic effects.
Journal ArticleDOI
Rotorcraft Aeroacoustics Computations with Overset-Grid CFD Methods
Journal ArticleDOI
Calculation of Rotor Blade-Vortex Interaction Airloads Using a Multiple-Trailer Free-Wake Model
TL;DR: In this paper, the results of rotor blade- vortex interaction airloads are presented with two different wake models in the comprehensive analysis CAMRAD II, and these calculated results are compared with the experimental data obtained from the higher-harmonic-control aeroacoustic rotor test (HART-I) program.
References
More filters
Journal ArticleDOI
Helicopter impulsive noise: Theoretical and experimental status
F. H. Schmitz,Y. H. Yu +1 more
TL;DR: The theoretical and experimental status of helicopter impulsive noise is reviewed in this article, where two major sources of helicopter noise are addressed: high-speed impulsive noises and blade- vortex interaction noise.
Journal ArticleDOI
Helicopter Model Rotor-Blade Vortex Interaction Impulsive Noise: Scalability and Parametric Variations
TL;DR: In this article, a 1/7-scale model main rotor of the AH-1 series helicopter was compared with averaged full scale, inflight acoustic data under similar nondimensional test conditions.
Journal ArticleDOI
The Prediction of Transonic Flows on an Advancing Rotor
Model helicopter rotor high-speed impulsive noise: Measured acoustics and blade pressures
TL;DR: In this article, a 1/17-scale research model of the AH-1 series helicopter main rotor was tested at high speeds where full-scale helicopter high-speed impulsive noise levels are known to be dominant.
The prediction of transonic flows on advancing rotors
TL;DR: In this paper, a loose-coupled iteration procedure between a finite difference and a comprehensive integral rotor code was proposed to perform finite-difference computations for a trimmed rotor in high-speed, advancing flight.
Related Papers (5)
Experimental and Analytical Studies of a Model Helicopter Rotor in Hover
F. X. Caradonna,C. Tung +1 more