Flight-Path Management/Control Methodology to Reduce Helicopter Blade-Vortex Interaction Noise

2002 ◽  
Vol 39 (2) ◽  
pp. 193-205 ◽  
Author(s):  
Fredric H. Schmitz ◽  
Gaurav Gopalan ◽  
Ben Wel-C. Sim
Keyword(s):  
Management Control ◽  
Flight Path ◽  
Vortex Interaction ◽  
Helicopter Blade ◽  
Blade Vortex Interaction ◽  
Control Methodology

scholarly journals Blade-Vortex Interaction Noise Controller Based on Miniature Trailing Edge Effectors

2018 ◽  
Vol 23 (No 3, September 2018) ◽  
pp. 378-384 ◽  
Author(s):  
Sara Modini ◽  
Giorgio Graziani ◽  
Giovanni Bernardini ◽  
Massimo Gennaretti
Keyword(s):  
Potential Flow ◽  
High Frequency ◽  
Vortex Interaction ◽  
Trailing Edge ◽  
Computational Tools ◽  
Flow Simulations ◽  
Blade Vortex Interaction ◽  
Helicopter Main Rotor ◽  
Control Methodology ◽  
Blade Loads

The present work focuses on the alleviation of Blade Vortex Interaction (BVI) noise annoyance through a control methodology generating high-frequency aerodynamic BVI counter-actions. The low-power requirements make the Micro-Trailing Edge Effectors (MiTEs) particularly suited for this kind of application. The controller layout is set by observing the BVI scenario while the actuation law is efficiently synthesized through a process based on an analytical unsteady sectional aerodynamic formulation. The validation of the proposed control methodology is carried out through numerical investigations of a realistic helicopter main rotor in flight descent, obtained using computational tools for potential-flow aerodynamic and aeroacoustic analyses based on boundary element method solutions. In order to capture the aerodynamic influence of MiTEs through potential-flow simulations, the MiTEs are replaced by trailing edge plain flaps which provide equivalent aerodynamic responses. Results concerning the proposed controller capability to alleviate high-frequency blade loads and subsequent emitted noise from BVI events are presented and discussed.

Effect of Leading-Edge Serrations on Helicopter Blade–Vortex Interaction Noise

2017 ◽  
Vol 62 (3) ◽  
pp. 1-11 ◽  
Author(s):  
Joel A. Feinerman ◽  
Sudarshan Koushik ◽  
Fredric H. Schmitz
Keyword(s):  
Leading Edge ◽  
Vortex Interaction ◽  
Helicopter Blade ◽  
Blade Vortex Interaction

scholarly journals Reduction of helicopter blade-vortex interaction noise by active rotor control technology

1997 ◽  
Vol 33 (9-10) ◽  
pp. 647-687 ◽  
Author(s):  
Yung H. Yu ◽  
Bernd Gmelin ◽  
Wolf Splettstoesser ◽  
Jean J. Philippe ◽  
Jean Prieur ◽  
...  
Keyword(s):  
Control Technology ◽  
Vortex Interaction ◽  
Helicopter Blade ◽  
Blade Vortex Interaction ◽  
Active Rotor Control ◽  
Rotor Control
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