Results 31 to 40 of about 1,004,206 (164)

Stall Margin Improvement in an Axial Compressor by Continuous and Pulsed Tip Injection

International Journal of Turbomachinery, Propulsion and Power, 2022
Stall and surge are strong limitations in the operating range of compressors and thus one of the major limits of jet engine performance. A promising way to push the stability limit of compression machines is to inject a small amount of flow at the blade ...
Joseph Moubogha Moubogha, Gabriel Margalida, Pierric Joseph, Olivier Roussette, Antoine Dazin   +4 more
doaj   +1 more source

Wind Turbine Enhancement via Active Flow Control Implementation

Applied Sciences
The present research enhances the efficiency of an airfoil section from the DTU-10MW Horizontal Axis Wind Turbine (HAWT) via Active Flow Control (AFC) implementation and when using synthetic jets (SJ).
Marc Lahoz, Ahmad Nabhani, Mohammad Saemian, Josep M. Bergada   +3 more
doaj   +1 more source

Reinforcement Learning for Active Flow Control in Experiments

CoRR, 2020
We demonstrate experimentally the feasibility of applying reinforcement learning (RL) in flow control problems by automatically discovering active control strategies without any prior knowledge of the flow physics. We consider the turbulent flow past a circular cylinder with the aim of reducing the cylinder drag force or maximizing the power gain ...
Dixia Fan, Liu Yang 0027, Michael S. Triantafyllou, George Em Karniadakis   +3 more
openaire   +2 more sources

Magnetically Actuated Microvalves for Active Flow Control [PDF]

Journal of Physics: Conference Series, 2006
The reattachment of separated air flows can be actively controlled by blowing oscillatory air jets in the boundary layer, through submillimetric holes situated near the separation edge. To achieve such pulsed jets, a high flow rate, high actuation frequency microvalve was designed, fabricated and characterized.
Ducloux, Olivier, Deblock, Yves, Talbi, Abdelkrim, Gimeno, Leticia, Tiercelin, Nicolas, Pernod, Philippe, Preobrazhensky, Vladimir L., Merlen, Alain   +7 more
openaire   +3 more sources

Progress of active flow control aircraft adopting rudderless flight control and STOL

Advances in Aerodynamics
Active flow control aircraft (AFCA) represent a significant development direction in next-generation aircraft design. Among them, rudderless flight control (RFC) and short takeoff and landing (STOL) are gaining widespread attentions and are gradually ...
Zhijie Zhao, Zhenbing Luo, Xiong Deng, Jianyuan Zhang, Yan Zhou, Wenqiang Peng, Yanbin Feng   +6 more
doaj   +1 more source

Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles

Applied Sciences, 2020
In fluid mechanics, drag related problems aim to reduce fuel consumption. This paper is intended to provide guidance for drag reduction applications on cars.
Ferenc Szodrai
doaj   +1 more source

Investigations on the Potentials of Novel Technologies for Aircraft Fuel Burn Reduction through Aerostructural Optimisation

Aerospace, 2022
A physics-based optimisation framework is developed to investigate the potential advantages of novel technologies on the energy efficiency of a midrange passenger aircraft.
Valerio Mosca, Ali Elham
doaj   +1 more source

Verification of Boundary Conditions Applied to Active Flow Circulation Control

Aerospace, 2019
Inclusion of Active Flow Control (AFC) into Computational Fluid Dynamics (CFD) simulations is usually highly time-consuming and requires extensive computational resources and effort.
Petr Vrchota, Aleš Prachař, Pavel Hospodář   +2 more
doaj   +1 more source

Aerodynamic Drag Reduction and Optimization of MIRA Model Based on Plasma Actuator

Actuators, 2020
Active flow control of surface dielectric barrier discharge (SDBD) plasma is a technology that converts electrical energy into kinetic energy to achieve flow control. Its main application areas are concentrated in the aviation field.
Chenguang Lai, Hang Fu, Bo Hu, Zhiwei Ling, Li Jiang   +4 more
doaj   +1 more source

In-sewer sedimentation associated with active flow control

Water Science and Technology, 2009
Active flow control using automated gates and weirs aims to utilise available dispersed storage within sewer systems to alleviate the severity and frequency of localised flooding incidents. Whilst a previous study has demonstrated its potential, a key operational concern before implementation was sedimentation. An experimental programme was designed to
K J, Williams, S J, Tait, R M, Ashley
openaire   +2 more sources