Results 21 to 30 of about 6,040,269 (294)

Active flutter suppression for a flexible wing model with trailing-edge circulation control via reinforcement learning

open access: yesAIP Advances, 2023
Previous attempts at active flutter suppression have been based on driving the deflection of multiple pairs of discontinuous mechanical control surfaces.
Zhen Chen   +4 more
doaj   +1 more source

Influence of Flow-induced Vibration of a D-VAWT With and Without Leading-edge Rod at Various Pitch Angles [PDF]

open access: yesJournal of Applied Fluid Mechanics
Under specific incoming wind speeds, Darrieus- Vertical Axis Wind Turbines (D-VAWT) have been found to display significant amplitude vibrations. Previous studies mainly examined the D-VAWT's aerodynamics, ignoring flow-induced vibration (FIV).
C. B. Maheshwaran   +2 more
doaj   +1 more source

Marking function of Stokes number on airfoils’ aerodynamic penalties in a gas–solid flow

open access: yesIET Renewable Power Generation, 2021
This paper aims to employ the Stokes number to mark aerodynamic penalties of airfoils caused by particles, which is crucial to implement their scaling experiments in a gas‐solid flow.
Junjun Jin   +4 more
doaj   +1 more source

Numerical Research on the NS-SDBD Control of a Hypersonic Inlet in Off-Design Mode

open access: yesAerospace, 2022
The overall performance of a scramjet inlet will decline while entering off-design mode. Active flow control using nanosecond surface dielectric barrier discharge (NS-SDBD) can be a novel solution to such inlet–unstart problems.
Yilun Yan, Jiangfeng Wang
doaj   +1 more source

Relaminarisation of Re_τ=100 channel flow with globally stabilising linear feedback control [PDF]

open access: yes, 2011
The problems of nonlinearity and high dimension have so far prevented a complete solution of the control of turbulent flow. Addressing the problem of nonlinearity, we propose a flow control strategy which ensures that the energy of any perturbation to ...
Koberg, W. H.   +5 more
core   +1 more source

Bubble clustering in turbulent boundary layer on a moving wall utilizing belt-driven system

open access: yesJournal of Fluid Science and Technology
For simulating the behavior of air bubbles injected into the turbulent boundary layer developed beneath the bottom of a ship, we propose a novel experimental system for a different driving force on flow from the bulk pressure gradient.
Yasufumi HORIMOTO   +4 more
doaj   +1 more source

Investigation of active flow control of jet deflection rate in passive secondary flow thrust vectoring nozzle

open access: yesAIP Advances, 2022
Jet deflection rate is an essential index in the research of thrust vector control technology. The vectoring deflection of the jet is an unsteady flow.
Shaoqing Chi   +3 more
doaj   +1 more source

Applying colour-coded particle image velocimetry to the wake of a delta wing across a wide range of angles of attack

open access: yesJournal of Fluid Science and Technology
The forces acting on a delta wing are predominantly influenced by local flow structures, specifically leading-edge vortices (LEVs). This study applies colour-coded particle image velocimetry (PIV) to quantify wake dynamics and lift generation for a delta
Shūji ŌTOMO   +4 more
doaj   +1 more source

CFA2: a Context-Free Approach to Control-Flow Analysis [PDF]

open access: yes, 2011
In a functional language, the dominant control-flow mechanism is function call and return. Most higher-order flow analyses, including k-CFA, do not handle call and return well: they remember only a bounded number of pending calls because they approximate
Andrew Gordon   +7 more
core   +2 more sources

Longitudinal flight dynamics modeling and a flight stability analysis of a monocopter

open access: yesAIP Advances, 2022
A monocopter, which is a biology-inspired aircraft based on the samara, has been proved to have passive flight stability. However, due to the asymmetry of its configurations and the constant rotation during flight, its flight dynamics equation is complex.
Shengxiang Tong   +3 more
doaj   +1 more source

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