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Effect of ground proximity on the regressive lag mode during ground resonance: An experimental study
Salini S. Nair,
Published in Vertical Flight Society
2019
Abstract
This paper studies aerodynamic effects of ground on regressive lag mode damping during ground resonance. The experimental investigation is performed on a scaled helicopter model built to simulate the ground resonance scenario. The study involves both stationary as well as dynamic (oscillating) ground conditions. Experiments are conducted by measuring lead-lag damping at different rotor speeds (in the ground resonance regime) for different collective inputs. Results show that ground and its dynamics have a significant effect on regressive lead-lag mode damping during ground resonance. Copyright © 2019 by AHS - The Vertical Flight Society. All rights reserved.
About the journal
JournalThe Vertical Flight Society - Forum 75: The Future of Vertical Flight - Proceedings of the 75th Annual Forum and Technology Display
PublisherVertical Flight Society
Open AccessNo
Concepts (10)
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    Damping
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    AERODYNAMIC EFFECT
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    Experimental investigations
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    GROUND CONDITIONS
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    GROUND RESONANCE
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    HELICOPTER MODEL
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    LAG MODE DAMPING
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    LEAD-LAG
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    Rotor speed
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    Resonance