Results 261 to 270 of about 2,971,967 (301)
Some of the next articles are maybe not open access.
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
openaire +1 more source
Parameters Defining Active Flow Control
AIAA AVIATION 2021 FORUM, 2021There is a conceptual difference between Boundary Layer Control (BLC) and Active Flow Control (AFC). The former aims to compensate for frictional losses in the boundary layer, while the latter seeks to exploit instabilities in the flow to alter its character.
Oshima, Emile +3 more
openaire +2 more sources
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
openaire +1 more source
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
openaire +2 more sources
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.
openaire +1 more source
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
openaire +1 more source
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 ...
openaire +1 more source
Active Flow Control Strategies and Tools for Turbulent Flows
2019In this chapter we present considerations on the impact of the turbulence characteristics of most flows of industrial interest on the flow control interpretations or strategies. In the second part we will give an overview of the CFD approaches, including actuator integration methods.
Jean-Paul Bonnet, Ning Qin
openaire +1 more source
Active Control of Flows with Trapped Vortices
2009An approach to developing active control strategies for high Reynolds number flows with trapped vortices is presented.The problem considered is the stabilisation of the vortex in a special cavity on the airfoil using suction as an actuator.The flow dynamics are modelled by the parallel discrete vortex method capable of handling wall irregularities ...
R.M. Kerimbekov, O.R. Tutty
openaire +1 more source