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High-Lift Enhancement Using Active Flow Control
6th AIAA Flow Control Conference, 2011The high-lift performance of an airfoil with a single-element flap is enhanced using fluidic actuation based on synthetic jet technology. Acutation is implemented using a spanwise array of individually controlled discrete synthetic jets with variable spanwise spacing that issue in a direction nominally-tangential to the flap immediately upstream of ...
Michael Desalvo +2 more
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Flow Control Using Active Dimples
Fluids Engineering, 2004In this study, a novel concept of using active dimples for flow control is introduced. It is widely known that dimples on a golf ball dramatically reduce its aerodynamic drag. They are much more effective than surface roughness since the hollow spherical shape produces cavity flow, thus the drag coefficient remains relatively constant at higher ...
Natalie Udovidchik, Sebastien Lambert
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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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Active control of transonic buffet flow
Journal of Fluid Mechanics, 2017Transonic buffet is a phenomenon of aerodynamic instability with shock wave motions which occurs at certain combinations of Mach number and mean angle of attack, and which limits the aircraft flight envelope. The objective of this study is to develop a modelling method for unstable flow with oscillating shock waves and moving boundaries, and to perform
Chuanqiang Gao +4 more
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Buffeting Active Control in Transonic Flow
21st AIAA Applied Aerodynamics Conference, 2003In transonic flow conditions, the shock wave / turbulent boundary layer interaction and flow separations, which induce flow instabilities, “buffet”, and then structure vibrations, “buffeting”, can have an important influence on the aerodynamic behavior of the aircraft. The “buffet” phenomenon appears at high lift coefficient when the Mach number or the
Daniel Caruana +3 more
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Active inlet flow control technology demonstration
The Aeronautical Journal, 2000AbstractThis paper presents results from a joint Lockheed Martin/NASA Glenn effort to design and verify an ultra-compact, highly-survivable engine inlet subsonic duct based on the emerging technology of active inlet flow control (AIFC). In the AIFC concept, micro-scale actuation (∼mm in size) is used in an approach denoted ‘secondary flow control’ to ...
J. W. Hamstra +4 more
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Active Flow and Combustion Control 2014
2015Flow Control & Turbomachines.- Combustion.- Constant Volume Combustion.- Reduced Order Modeling.
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Cervical cancer prevention and control in women living with human immunodeficiency virus
Ca-A Cancer Journal for Clinicians, 2021Philip E Castle, Vikrant V Sahasrabuddhe
exaly
Cancer treatment and survivorship statistics, 2022
Ca-A Cancer Journal for Clinicians, 2022Kimberly D Miller +2 more
exaly
Dynamic-Active Flow Control - Phase I
2006Abstract : This is the report of an investigation of active flow control using a wall-normal, zero-net-mass-flux (ZNMF) jet located at the leading edge of an airfoil.
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