Results 41 to 50 of about 1,004,206 (164)

Performance enhancement of an axial flow compressor using active flow control technique

Cogent Engineering
This research article focuses on improving the efficiency of an axial flow compressor stage, enhancing the stall margin, and optimizing flow parameters.
Prithesh Pinto, Srinivas G
doaj   +1 more source

Active Flow Control for Helicopters

, 2013
Several active flow control helicopter applications aimed at improving aerodynamic performance have been studied at Onera and are presented in this paper. The distinction between applications for non-rotating or non-lifting parts and for rotating parts is presented.
Le Pape, A., Lienard, C., Bailly, J.
openaire   +2 more sources

Synthetic Jet Actuators for Active Flow Control: A Review

Fluids
A synthetic jet actuator (SJA) is a fluidic device often consisting of a vibrating diaphragm that alters the volume of a cavity to produce a synthesized jet through an orifice.
Howard H. Ho, Ali Shirinzad, Ebenezer E. Essel, Pierre E. Sullivan   +3 more
doaj   +1 more source

Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control

Proceedings, 2017
This paper presents an efficient and high-sensitive micro-sensor designed for wall shear stress measurement. The main technical application targeted is flow separation detection for closed-loop active flow control.
Cécile Ghouila-Houri, Quentin Gallas, Eric Garnier, Alain Merlen, Romain Viard, Abdelkrim Talbi, Philippe Pernod   +6 more
doaj   +1 more source

Numerical Study of the Effect of Corona Discharge on Upward Wake Flow in the Horizontal Axis Wind Turbine Farm [PDF]

Journal of Applied Fluid Mechanics
Many countries worldwide are showing a growing interest in renewable energy sources, with wind energy being a particularly appealing option for generating mechanical energy.
S. Abed Zahmatkesh Pasand, S. Karimian Aliabadi, S. K. Ghaemi Osgouie, M. Moshfeghi   +3 more
doaj   +1 more source

Effects of Input Voltage and Freestream Velocity on Active Flow Control of Passage Vortex in a Linear Turbine Cascade Using Dielectric Barrier Discharge Plasma Actuator

Energies, 2020
Passage vortex exists as one of the typical secondary flows in turbomachines and generates a significant total pressure loss and degrades the aerodynamic performance. Herein, a dielectric barrier discharge (DBD) plasma actuator was utilized for an active
Takayuki Matsunuma, Takehiko Segawa
doaj   +1 more source

An Experimental Investigation by Particle Image Velocimetry of the Active Flow Control of the Stall Inception of an Axial Compressor

International Journal of Turbomachinery, Propulsion and Power
This paper presents results from active flow control experiments carried out on a single stage axial compressor. The flow under various forced conditions has been investigated using 2D 2C particle image velocimetry (PIV) on three radial planes along the ...
Olha Alekseik, Pierric Joseph, Olivier Roussette, Antoine Dazin   +3 more
doaj   +1 more source

Control flow in active inference systems

, 2023
Living systems face both environmental complexity and limited access to free-energy resources. Survival under these conditions requires a control system that can activate, or deploy, available perception and action resources in a context specific way. We show here that when systems are described as executing active inference driven by the free-energy ...
Chris Fields, Filippo Fabrocini, Karl Friston, James F. Glazebrook, Hananel Hazan, Michael Levin, Antonino Marcianò   +6 more
openaire   +2 more sources

Active and Passive Flow Control around Simplified Ground Vehicles

Journal of Applied Fluid Mechanics, 2012
The aim of this work is to control the flow around ground vehicles by active or/and passive strategies. The active control is achieved by steady, pulsed or closed-loop jets located at the backof the simplified car model.
C.H Bruneau, E. Creusé, D. Depeyras, P. Gilliéron, I. Mortazavi   +4 more
doaj  

Investigation on the Impact of Air Admission in a Prototype Francis Turbine at Low-Load Operation

Energies, 2019
Due to significant changes in the energy system, hydraulic turbines are required to operate over a wide power range. In particular, older turbines which are not designed for these environments will suffer under off-design conditions. In order to evaluate
Julian Unterluggauer, Anton Maly, Eduard Doujak   +2 more
doaj   +1 more source