Reduction of helicopter blade-vortex interaction noise by active rotor control technology
Yung H. Yu,Bernd Gmelin,Wolf R. Splettstoesser,Jean Jacques Philippe,Jean Prieur,Thomas F. Brooks +5 more
TLDR
A review of active rotor control techniques for rotor blade vortex interaction noise reduction, including higher harmonic pitch control, individual blade control, and on-blade control, can be found in this paper.About:
This article is published in Progress in Aerospace Sciences.The article was published on 1997-01-01 and is currently open access. It has received 65 citations till now. The article focuses on the topics: Helicopter rotor & Aircraft noise.read more
Citations
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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
Modern helicopter rotor aerodynamics
TL;DR: In this paper, the fundamental aeromechanics of the wake and flow on the blade are discussed and the primary methods of analysis, computation, and experiment employed to uncover the physics of the rotor wake are described.
NASA Langley Scientific and Technical Information Output---1996
S H Stewart,M S Phillips +1 more
TL;DR: In this paper, the Langley Research Center has produced scientific and technical information during the calendar year 1996, including Formal Reports, High-Numbered Conference Publications, High Numbered Technical Memorandums, Contractor Reports, Journal Articles and Other Publications, Meeting Presentations, Technical Talks, Computer Programs, Tech Briefs, and Patents.
Journal ArticleDOI
Rotorcraft Vibration Reduction and Noise Prediction Using a Unified Aeroelastic Response Simulation
Dissertation
Structural dynamics modeling of helicopter blades for computational aeroelasticity
TL;DR: In this paper, a structural model and an aeroelastic model are provided and a computer program has been developed and tested in this research and validated by experimental data and other numerical simulation work for various conditions.
References
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Journal ArticleDOI
Vibration reduction in rotorcraft using active control - A comparison of various approaches
TL;DR: Based on the comparison of the various approaches, it appears that the actively controlled flap has remarkable potential for vibration reduction.
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
A feasibility study of using smart materials for rotor control
TL;DR: Preliminary data show that rotor control using smart materials might be feasible if a combination of smart materials is used and the rotor design is driven towards low control loads and motions.
Journal ArticleDOI
Key Results from a Higher Harmonic Control Aeroacoustic Rotor Test (HART)
W. R. Splettstoesser,Roland Kube,W. Wagner,U. Seelhorst,A. Boutier,F. Micheli,Edzard Mercker,Kurt Pengel +7 more
TL;DR: In this article, the effects of the higher harmonic blade pitch control technique on blade-vortex interaction (BVI) impulsive noise and vibration reduction were investigated with a BO-105 main rotor operated in the open-jetanechoic test section of the German-Dutch wind tunnel.