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Article

An Active Flap Deployment System for Blade–Disturbance Interaction Alleviation

[+] Author and Article Information
Carter T. Nelson, Othon K. Rediniotis

Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843-3141

J. Fluids Eng 126(6), 1006-1014 (Mar 11, 2005) (9 pages) doi:10.1115/1.1839928 History: Received June 02, 2003; Revised March 29, 2004; Online March 11, 2005
Copyright © 2004 by ASME
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Figures

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The two limiting cases of blade–vortex interaction
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Schematic of the Active Flap Deployment System concept
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Free response of the AFDS system and a single deployment
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Schematics illustrate ways of accommodating all means of parameter variation (stiffness, moment of inertia, and amplitude of oscillation) inside the blade–flap
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Schematic of wind tunnel experiment test section setup
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Surface pressure port locations
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Pressure distribution of experimental setup with no TEF or vortex generator deployment
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Parameter definition for the unsteady flap response formulation
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Comparison of CODE B results for different values of Φ
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Comparison of results from two different codes
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Comparison of experimental and theoretical results for the aerodynamic models
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Typical vortex generator deployment used in the experiments
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Comparison of BDI pressure signatures with and without AFDS deployment for (a) pressure port 2, U=13 m/s (b) pressure port 1, U=20 m/s and (c) pressure port 1, U=22.6 m/s
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An example of a typical AFDS deployment schedule
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Pressure histories for U=22.6 m/s and several ports during: (a) During BDI interaction, (b) AFDS deployment, and (c) combination of both

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