Project Title:

Smart-Skin Technology for Vortex Flow Detection

03.06-0533
911288
Smart-Skin Technology for Vortex Flow Detection
Innovative Dynamics
Cornell Research Park, 244 Langmuir Labs
Ithaca
NY
14850-1296
Gail A.
Hickman
607-257-0534
ARC
NAS2-13458
036

03.06-0533
911288

Abstract:

Smart Skin Technology for Vortex Flow Detection
Innovative methods for measuring and controlling vortex-dominated flows will be developed
to achieve enhanced mission performance of advanced technology fighters. The primary
objective of this project is to define and quantify experimentally techniques for
measuring surface flow patterns and vortex structures. Phase I will demonstrate an
innovative concept based on "smart skins" to measure vortex flow fields on a delta
wing using sensor arrays integral with the airfoil skin. The basic concept is to
measure pressure and shear forces at the surface with thin-film arrays and construct
three-dimensional vortex fields using digital signal processing techniques. Laboratory
experiments and wind tunnel flow visualization tests will be conducted to demonstrate
embedded solid-state transducers in an open-loop mode of operation. The most promising
sensors/actuators will be integrated into a thin boot design for Phase II developmental
and Phase III in-flight testing on NASA's F/A-18 high-angle-of-attack (AOA) research
vehicle. This work will help researchers verify the accuracy of computational fluid
dynamics calculations to predict accurately the aerodynamics and behavior of an aircraft
maneuvering at high AOA. Successful development of smart skins could produce advanced
control mechanisms that will extend fighter aircraft performance envelopes without
the complexity and weight penalties of pneumatic control systems.
Fundamental knowledge of the spatial and temporal structure of vortex flows would
have important uses in boundary layer management, high-angle-of-attack aerodynamics,
separated flows, rotor wake interactions, and vane-type vortex generators. The USAF/NASA
AFTI Mission Adaptive Wing program and the Advanced Tactical Fighter would directly
benefit from this technology.
vortex sensor array, vortex manipulator, smart skin, piezoelectric