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Showing 1 to 16 of 16 for “"Circulation control"”.
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Design and Performance of Circulation Control Geometries
… Takeoff and Land (CESTOL) aircraft. </p> <p>With circulation control (CC) technology addressing most of the next generation requirements listed above, it has recently been gaining more interest, thus the basis of this research. CC is an active flow control method that uses a thin sheet of high …
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The Performance of Aerofoil Cascades Using Circulation Control
… of two-dimensional, bluff aerofoils employing circulation control by a tangential blowing jet is investigated. Expressions for the lift and drag of such a cascade are derived to eliminate the direct effect of the blowing jet on the measured performance. The cascade characteristics for three …
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2D CFD Simulation of a Circulation Control Inlet Guide Vane
… results of two 2-D computational studies of a circulation control Inlet Guide Vane (IGV) that takes advantage of the Coanda effect for flow vectoring. The IGV in this thesis is an uncambered airfoil that alters circulation around itself by means of a Coanda jet that exhausts along the IGV's …
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A Computational Study of Engine Deflection Using a Circulation Control Wing
… led to the investigation of the coupling of a Circulation Control Wing and Upper Surface Blowing engine. The Circulation Control Wing entrains the flow of the engine to be deflected downward such that a component of the thrust is now in the vertical direction. The unfortunate consequence of the …
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Circulation control for download wake reduction on a scaled V-22 model
West Virginia University has developed a circulation controlled model of the V-22 wing to reduce the size of the download in the wake region brought upon by the airflow from the proprotors. The techniques being used in this experiment are the implementation of blowing slots across the leading edge …
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Augmented Propeller Design with the use of a Passive Circulation Control Pressurization System
Circulation control is a high-lift device used on the main wing of an aircraft. This technology has been in the research and development phase for over sixty years primarily for fixed-wing aircraft when the early models were referred to as "blown flaps." Circulation control works by increasing the …
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Design and Development of an Air Supply System for an Unmanned Circulation Control Aerial Vehicle
… performance 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 …
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Qualitative Methods Used to Develop and Characterize the Circulation Control System on Cal Poly's AMELIA
<p>The circulation control system onboard Cal Poly's Advanced Model for Extreme Lift and Improved Aeroacoustics was a critical component of a highly complex wind tunnel model produced in order to fulfill the requirements of a NASA Research Announcement awarded to David Marshall of the Aerospace …
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Time-Resolved Analysis of Circulation Control over Supercritical Airfoil using Digital Particle Image Velocimetry (DPIV)
Active pneumatic flow control methods as applied to aerospace applications have shown noteworthy improvements in lift compared to traditional means. The General Aviation Circulation Control (GACC) concept currently under investigation at NASA's Langley Research Center (LaRC) is an attempt at …
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Implementation of an Air Supply Unit Control Scheme for the UC2AV (Unmanned Circulation Control Aerial Vehicle)
… that can reduce the impact of these limitations. Circulation Control (CC) is an active flow technique that has been proven as a method for augmenting the lift of fixed-wing aircraft. To enhance the performance and reduce the energy impact of a CC system on a UAV, a control system is required. This …
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Parametric Study of Aerodynamic Performance of an Airfoil with Active Circulation Control Using Leading Edge Embedded Cross-Flow Fan
… near the leading edge of an airfoil to actively control the boundary layer for lift and thrust enhancement has been proposed. The design places a cross-flow fan near the leading edge of an airfoil and flow is drawn in from the pressure side of the airfoil, energized and expelled out to the …
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Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration
<p>In the past, 2D CFD analysis of Circulation Control technology have shown poor comparison with experimental results. In Circulation Control experiments, typical results show a relationship between lift coefficient, CL, vs blowing momentum coefficient, Cμ. CFD analysis tend to over-predict values …
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Hybrid Airfoil Design Methods for Full-Scale Ice Accretion Simulation
… the aft section profile that provides the circulation necessary for simulating full-scale airfoil droplet-impingement characteristics. The outcome of the study, therefore, reveals circulation control as the main design variable. To best utilize this fact, this thesis describes two …
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An Experimental Investigation of the STOL Performance of Cal Poly's AMELIA in the NFAC
… leading- and trailing-edge blowing wing circulation control and over-the-wing mounted turbine propulsion simulators (TPS) to date. Testing of the 10 foot span model proved successful and was the result of a 5 year NASA Fundamental Aeronautics Program Research Announcement. The test …
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Novel Inverse Airfoil Design Utilizing Parametric Equations
… with parametric equations from the CST method to control shape changes and relate them to the required changes in the pressure or velocity distribution. To display the power of the methods, design cases are presented in the subsonic and transonic regimes. A circulation control design case is also …