Results 31 to 40 of about 14,585,722 (247)

Advances in Flow Control Methods for Pump-Stall Suppression: Passive and Active Approaches

Energies
This article provides a comprehensive review of key approaches to suppressing stall flow in pumps, offering insights to enhance pump performance and reliability.
Hongbo Zhao, Xiangkai Zhou, Long Meng, Xuejin Zhu, Chengqi Mou, Peijian Zhou   +5 more
doaj   +1 more source

Large-Eddy Simulation of Flow Separation and Control on a Wall-Mounted Hump [PDF]

, 2009
Active flow control techniques such as synthetic jets have been successful in increasing the performance of naturally separating flows on post-stall airfoils, bluff body shedding, and internal flows such as wide-angle diffusers.
Franck, Jennifer Ann
core   +1 more source

Active flow control on airfoils by reinforcement learning

Ocean Engineering, 2023
Active flow control is a widespread practice for airfoil aerodynamic performance enhancement. Within active flow control, reactive strategies are very effective, but the adequate design of these strategies is often complex. This study proposes a reactive control strategy based on a Reinforcement Learning (RL) agent to effectively govern the motion of a
Koldo Portal-Porras, Unai Fernandez-Gamiz, Ekaitz Zulueta, Roberto Garcia-Fernandez, Saioa Etxebarria Berrizbeitia   +4 more
openaire   +2 more sources

Effectiveness of active flow control for turbulent skin friction drag reduction [PDF]

, 2011
The effectiveness of the opposition control method proposed by Choi et al. [J. Fluid Mech. 262, 75 (1994)] has been studied using direct numerical simulations.
Chung, Yongmann M., Talha, Tariq, Yongmann M. Chung, Tariq Talha   +3 more
core   +1 more source

Active Flow Control for High-Speed Trains: From Local Flow Manipulation to Mission-Adaptive Aerodynamic Control

Fluids
High-speed train aerodynamics have mainly been improved by passive design methods, such as streamlined noses, local fairings, and surface smoothing. These methods have achieved clear benefits, but several important aerodynamic problems remain difficult ...
Li Sheng, Kaimin Wang, Xiaodong Chen, Yujun Liu, Tanghong Liu   +4 more
doaj   +1 more source

Performance Assessment of Fluidic Oscillators Tested on the NASA Hump Model

Fluids, 2021
Flow separation control over a wall-mounted hump model was studied experimentally to assess the performance of fluidic oscillators (sweeping jet actuators). An array of fluidic oscillators was used to control flow separation.
Mehti Koklu
doaj   +1 more source

Active flow separation control at the outer wing [PDF]

CEAS Aeronautical Journal, 2019
Within the European project AFLoNext, one of the technological streams is dedicated to the investigation of active flow control (AFC) to increase the robustness of the wing tip design at takeoff conditions, whilst allowing the optimization of aerodynamic efficiency in cruise. AFC is used to delay the wing tip stall, which is caused by vortex breakdown,
Rosenblum, Jean-Pierre, Vrchota, Petr, Prachar, Ales, Peng, Shia-Hui, Wallin, Stefan, Eliasson, Peter, Iannelli, Pierluigi, Ciobaca, Vlad, Wild, Jochen, Hantrais-Gervois, Jean-Luc, Costes, Michel   +10 more
openaire   +4 more sources

Effect of Plasma Actuator Layout on the Passage Vortex Reduction in a Linear Turbine Cascade for a Wide Range of Reynolds Numbers

Actuators, 2023
This study examined how various plasma actuator (PA) configurations affect the passage vortex (PV) reduction in a linear turbine cascade (LTC) utilizing dielectric barrier discharge PAs.
Takayuki Matsunuma, Takehiko Segawa
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source