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Accession Number DE2013-1079768
Title Petascale, Adaptive CFD. (ALCF ESP Technical Report). ALCF-2 Early Science Program Technical Report.
Publication Date May 2013
Media Count 16p
Personal Author K. E. Jansen M. Rasquin
Abstract The aerodynamic simulations of this project involve modeling of active flow control based on synthetic jet actuation that has been shown experimentally to produce large-scale flow changes (e.g., re-attachment of separated flow or virtual aerodynamic shaping of lifting surfaces) from micro-scale input. This micro-scale input consists for instance in 0.1 W piezoelectric disk which resonate in a cavity alternately and pushes/pulls out/in the fluid through a small slit to create small-scale vortical structures that interact with, and thereby dramatically alter, the cross flow. This process has yet to be understood fundamentally. Synthetic jet actuators offer the prospect of not only augmenting lift but also other forces and moments in a dynamic and controlled fashion for a range of operating conditions. They have been demonstrated to restore and maintain flow attachment and reduce vibrations in wind turbine blades during dynamic pitch, thereby reducing unsteady loads on gearboxes that are currently the prime failure point. In virtual-shape flight control surfaces for aerial vehicles (including commercial airplanes), conventional control surfaces (e.g., flaps, rudder, etc.) can be augmented or even replaced with active flow control, thus improving their lift-to-drag ratio and/or control power.
Keywords Aerial vehicles
Aerodynamics
Computational fluid dynamics
Drag
Flight control systems
Flow rate
Gearboxes
Jets
Petascale
Simulation
Wind turbine blades


 
Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46B - Fluid Mechanics
51A - Aerodynamics
97O - Miscellaneous Energy Conversion & Storage
Corporate Author Argonne National Lab., IL.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1320
Contract Number DE-AC02-06CH11357

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