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Active Control of Separated Flow
2022The performance of many objects is primarily dictated by the flow of surrounding air or water. For example, most of vehicle fuel usage is required to overcome aerodynamic drag. Conversely, the energy in flowing fluids can be harnessed as a renewable energy source.
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Flow control with active dimples
The Aeronautical Journal, 2007AbstractThe long-term goal is to design and manufacture optimal ‘on-demand’ vortex generators, ‘dimples’ that can produce vortices of prescribed strength and duration for the real-time control of aerodynamic flows that are either undergoing transition or are fully turbulent, attached or separating.
S. Dearing, S. Lambert, J. Morrison
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Active Flow Control of Wing Separated Flow
Volume 1: Fora, Parts A, B, C, and D, 2003Numerical investigations of active flow control, which can offer significant improvements to wind–turbine rotor and turbomachinery performance by suppressing detrimental effects of separated flow, are presented. Simulations of pulsating jet flow control applied on wings at low speed, high Reynolds number turbulent flow and fixed angles of incidence are
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Active Control of Unsteady Cavitating Flows in Turbomachinery
Volume 2A: Turbomachinery, 2019Abstract A preliminary 2D numerical investigation of the active control of unsteady cavitation by means of one single synthetic jet actuator (SJA) is presented. The SJA has been applied to hinder the intrinsic instabilities of a cloud cavitating flow of water around a NACA 0015 hydrofoil with an angle of attack of 8° and ambient ...
de Giorgi M. G. +2 more
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Development of Piezoelectric Actuators for Active Flow Control
AIAA Journal, 2001The development of piezoelectric actuators for active e ow control is discussed. The type of actuators considered consists of a single sheet of piezoceramic material bonded to the underside of a shim: a “ unimorph” e ap design. Existing theoretical beam models are extended to incorporate a linear strain distribution in the composite unimorph beam ...
Louis N. Cattafesta III +2 more
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Iterative design for active control of fluid flow
2001 European Control Conference (ECC), 2001Iterative controller design for planar Poiseuille flow by model unfalsification and controller redesign is the topic of the paper. The main contribution is to show that model-unfalsification-based iterative design can be useful in flow control problems.
Veres, S.M. +3 more
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Simulation of Active Flow Control on a Stalled Airfoil
Flow, Turbulence and Combustion, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Spalart, Philippe +3 more
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Active flow control applied to an airfoil
36th AIAA Aerospace Sciences Meeting and Exhibit, 1998Results of numerical simulations of active flow control applied to an airfoil using the Reynoldsaveraged Navier-Stokes equations are presented. The simulations are first compared with the poststall separation control experiments of Seifert et al.1'12 on a NACA0015 at 1.2 x 106 chord Reynolds number.
John Donovan, Linda Kral, Andrew Cary
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Multiscale Active Flow Control
2007The physics of the multiscale patterns of flows is introduced in the first part: it is the foundation for analysis of the control of flow. Then a careful distinction is made between control as a passive mean for improving the properties of natural flows relevant to a given application, and control as a robust active tool to optimize a cost function ...
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Semantics of Control-Flow in UML 2.0 Activities
2004 IEEE Symposium on Visual Languages - Human Centric Computing, 2005The recent major revision of the UML has introduced significant changes and additions. In particular, the metamodel portion underlying Activity Diagrams has been completely reengineered, with Activity being the central concept, the successor of ActivityGraph in UML 1.5.
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