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Showing 1 to 20 of 49 for “"active flow control"”.
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Wind tunnel test section design active flow control implementation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Experimental Investigations into Shark Skin Inspired Active Flow Control Mechanisms
A method for reducing flow separation with actively actuated flaps inspired by bristlingshark scales was studied experimentally using digital particle image velocimetry (DPIV).The flaps in this study had a rectangular shape and were designed with a protrusion heightin the bottom 10% of the boundary …
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Active Flow Control of a Boundary Layer Ingesting Serpentine Diffuser
… ingested boundary layer creates strong secondary flows that lead to severe flow distortion at the engine face, increasing the possibility of engine surge. This study investigated the use of enabling active flow control methods to reduce engine-face distortion. An ejector-pump based system of …
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Jet oscillation applied for aircraft cabin ventilation using active flow control actuators
… the effectiveness of jet oscillation using active flow control to improve air delivery inside a cabin. The pulsed jet and synthetic jet are selected among the various control techniques to provide the control excitations on the air supply condition based on a detailed review of current …
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Dynamic control of aerodynamic forces on a moving platform using active flow control
… interaction between trailing edge aerodynamic flow control and airfoil motion in pitch and plunge is investigated in wind tunnel experiments using a two degree-of-freedom traverse which enables application of time-dependent external torque and forces by servo motors. The global aerodynamic …
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Experimental Investigation of the Active Flow Control on a Two-Dimensional Wind Turbine Airfoil
… Energy (CoE) of the wind power. In this study, active flow control with unsteady blowing actuators was applied to a two-dimensional wind turbine airfoil to alleviate the unsteady aerodynamic loading and improve the aerodynamic performance, particularly under large scale freestream disturbances. …
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The Effects of Active Flow Control on High-Speed Jet Flow Physics and Noise
… of a fully turbulent, compressible jet flow within a large scale anechoic chamber. The investigations are aimed at understanding the complex nature of the jet flow field in an effort to reduce the far-field noise through active flow control and novel reduced-order modeling. The flow …
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Characterization of inclined oscillating jets and crossflow interaction for use in active flow control
… of inclined fluidic oscillator jets with a crossflow across a range of different blowing ratios. The fluidic oscillators used in the current study featured rounded internal feedback channels and produced spatially oscillating jets at predictable frequencies. When integrated into aerodynamic …
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Active Flow Control For Reduction of Unsteady Stator-Rotor Interaction In a Turbofan Simulator
… in this dissertation consists of employing active trailing edge blowing control to reduce the unsteady stator-rotor interaction in a turbofan simulator. Two active flow control systems with different wake sensing approaches are successfully implemented on the engine simulator. The first flow …
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Active Flow Control of a Three-Element Airfoil in Unbounded Flow and in Ground Effect
… by NASA/McDonnell Douglas for which high quality flow field data is available. As a result, it has been a subject of many Computational Fluid Dynamics (CFD) simulations in the literature. In this research, CFD simulations are performed using commercial CFD solver ANSYS Fluent. Reynolds-Averaged …
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Investigating the frequency behavior of fluidic oscillators and their application as active flow control for an SNLF airfoil
… element and large portions of the aft element. Active unsteady flow control using embedded fluidic oscillators was identified as a potential source to improve the flow field and maximize the lift of a multi-element system like the SNLF S414. The predictive model was used to design a set of …
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Active Flow Control of Subsonic Flow in an Adverse Pressure Gradient Using Synthetic Jets and Passive Micro Flow Control Devices
… recent studies have shown the advantages of active and/or passive flow control devices for boundary layer flow modification. Many current and future proposed air vehicles have very short or offset diffusers in order to save vehicle weight and create more optimal vehicle/engine integration. …
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Experimental Investigation of Flow Control Techniques To Reduce Hydroacoustic Rotor-Stator Interaction Noise
Control of radiated acoustic noise is vital to the survivability and the detectability of submersible watercraft. Two primary sources of radiated fluid noise in submersible vessels are the boundary layer turbulence along the forebody and propulsor fluid-structure interaction. The propulsor contains …
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Experimental Investigation of an Actively Controlled Three-Dimensional Turret Wake
… bluff bodies develop complex, three-dimensional flow fields that introduce high mean and fluctuating loads to the turret as well as the airframe support structure which reduce the performance of both the optical systems and the aircraft. An experimental investigation of the wake of a …
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Nonlinear Estimation and Control Methods for Mechanical and Aerospace Systems under Actuator Uncertainty
<p>Air flow velocity field control is of crucial importance in aerospace applications to prevent the potentially destabilizing effects of phenomena such as cavity ow oscillations, flow separation, flow-induced limit cycle oscillations (LCO) (flutter), vorticity, and acoustic instabilities. Flow …
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Numerical Simulations of Flow past a Triangular Airfoil and in a Sweeping Jet Actuator Using Different Turbulence Models
… goal of this research is to perform 2D turbulent flow simulations to predict the flow past a triangular airfoil used for a Mars air vehicle and in a sweeping jet actuator used for active flow control. Simulations are performed using the commercial CFD software ANSYS Fluent.</p> <p>The thesis …
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Design and Development of an Air Supply System for an Unmanned Circulation Control Aerial Vehicle
… is increasing, technologies as Circulation Control (CC), which is an active flow control technique that is used to achieve enhanced payload and aerodynamic efficiency, attracts the interest of the research community. This thesis describes the design, development,integration and testing …
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An Experimental Study of Synthetic Jet Actuators with Application in Airfoil LCO Control
… can be achieved through the implementation of Active Flow Control (AFC) techniques, however to this day, a limited amount of experimental studies exist. Thus, the focus of this work is to develop a new AFC method consisting of an actuator that is directly instrumented in the internal volume of …
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Development of UAV flight test demonstrator for cyclotronic arc-plasma actuator
… innovation research (SBIR) program, a novel flow control device known as the Cyclotronic Arc-Plasma Actuator (CAPA) actuator is being developed. This actuator uses a series of magnets and electrodes to produces a sweeping plasma arc that can induce a swirling component on a flow. One …
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