Supersonic wind tunnel
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Analysis of high Reynolds numbers effects on a wind turbine airfoil using 2D wind tunnel test data Open
The aerodynamic behaviour of a wind turbine airfoil has been measured in a dedicated 2D wind tunnel test at the DNW High Pressure Wind Tunnel in Gottingen (HDG), Germany. The tests have been performed on the DU00W212 airfoil at different R…
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Application of a Diffuser Structure to Vertical-Axis Wind Turbines Open
The effects of using a wind acceleration device (wind lens) with vertical-axis wind turbines in wind tunnel experiments were examined. A wind lens consists of a diffuser and flanges, and this study investigated the optimum parameters of th…
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Comparison of different droplet measurement techniques in the Braunschweig Icing Wind Tunnel Open
The generation, transport and characterization of supercooled droplets in multiphase wind tunnel test facilities is of great importance for conducting icing experiments and to better understand cloud microphysical processes such as coalesc…
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Experimental investigation of Surface Roughness effects and Transition on Wind Turbine performance Open
Aerodynamic experiments have been executed in the wind tunnel and on a wind turbine blade to measure the impact of roughness on the airfoil characteristics and the associated effect on rotor performance and to establish the transition loca…
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Scaled wind turbine setup in a turbulent wind tunnel Open
Wind tunnel experiments with scaled model turbines are a viable complement to field tests and simulations. The scaling of a 5 MW reference turbine with the aim of maintaining the design tip speed ratio and lift distribution is introduced. …
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Investigation of laminar-turbulent transition of supersonic boundary layer by scanning constant temperature hot-wire anemometer Open
The work is devoted to the experimental study of the regularities of laminar-turbulent transition in supersonic boundary layers. The experiments were carried out in the low-noise supersonic wind tunnel T-325 of ITAM SB RAS. The measurement…
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First and Fifth Hypersonic International Flight Research Experimentation’s Flight and Ground Tests Open
Experimentation (HIFiRE) program is a
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Control of flow separation on a contour bump by jets in a Mach 1.9 free-stream: An experimental study Open
Flow separation control over a three-dimensional contour bump using jet in a Mach 1.9 supersonic free-stream has been experimentally investigated using a transonic/supersonic wind tunnel. Jet total pressure in the range of 0–4 bar was blow…
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Blockage and Three-Dimensional Effects in Wind-Tunnel Testing of Ice Accretion over Wings Open
Wind-tunnel testing of ice accretion over aircraft wings is simulated numerically to investigate the effects of tunnel blockage and of the wall–wing interference at the wall–model juncture. The open-source OpenFOAM software is used to comp…
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Behavior of Piston Wind Induced by Braking Train in a Tunnel Open
It is critical to discover the behavior of piston wind induced by a braking train in a tunnel, but there is little research on the theoretical derivation for piston wind behavior. Predicting piston wind behavior as an unsteady airflow by a…
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Convergence of transonic wind tunnel test results of the AGARD-B standard model Open
AGARD-B is a widely-used configuration of a standard wind tunnel model. Beside its originally intended application for correlation of data from supersonic wind tunnel facilities, it was tested in a wide range of Mach numbers and, more rece…
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Aerodynamic impact of wind-sand flow on moving trains in tunnel-embankment transition section: from field testing to CFD modeling Open
The acceleration of land desertification has led to an increasingly serious threat to the operation safety of tunnel entrance in the Gobi and desert regions by wind-sand flow, and it is urgent to study and enhance the running safety of tra…
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Study of Wind Loads and Wind Speed Amplifications on High‐Rise Building with Opening by Numerical Simulation and Wind Tunnel Test Open
High‐rise buildings are very sensitive to wind excitations, and wind‐induced responses have always been the key factors for structural design. Facade openings have often been used as aerodynamic measures for wind‐resistant design of high‐r…
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Angle of Attack Investigations on the Performance of a Diverterless Supersonic Inlet Open
An extensive experimental investigation to study the effects of angle of attack (AOA) on the performance of a body-integrated supersonic inlet has been carried out. The present inlet, known as Diverterless Supersonic Inlet (DSI), is utiliz…
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The Role of Free-Stream Turbulence in Attenuating the Wind Updraft above the Collector of Precipitation Gauges Open
In operational conditions, wind is the main environmental source of measurement biases for catching-type precipitation gauges. The gauge geometry induces a deformation of the surrounding airflow pattern, which is generally characterized by…
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A new low-turbulence wind tunnel for animal and small vehicle flight experiments Open
Our understanding of animal flight benefits greatly from specialized wind tunnels designed for flying animals. Existing facilities can simulate laminar flow during straight, ascending and descending flight, as well as at different altitude…
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HB-2 high-velocity correlation model at high angles of attack in supersonic wind tunnel tests Open
Responding to a need for experimental data on a standard wind tunnel model at high angles of attack in the supersonic speed range, and in the absence of suitable reference data, a series of tests of two HB-2 standard models of different si…
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Investigation into Boundary Layer Transition on the MEXICO Blade Open
Boundary layer transition studies have been carried out using the unsteady surface pressure data from the EU project MEXICO and the later New-MEXICO experiment at the DNW wind tunnel, which have been subject of investigation in IEA Wind Ta…
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Wind tunnel study on natural instability of the normal force on a full‐scale wind turbine blade section at Reynolds number 4.7 · 10 <sup>6</sup> Open
Wind turbines are exposed to the turbulent wind of the atmospheric boundary layer. Consequently, the aerodynamic forces acting on the rotor blades are highly complex. To improve the understanding, a common practice is the experimental or n…
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Wind Tunnel Investigation of Twisted Wind Effect on a Typical Super-Tall Building Open
This paper investigates the twisted wind effect on a typical super-tall building (500-m-tall square prism) by conducting pressure model wind tunnel tests. Two twisted wind fields (TWFs) with maximum yaw angles of approximately 30° and 20°,…
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Design and implementation of rigid-flexible coupling for a half-flexible single jack nozzle Open
The aerodynamic design of a rigid-flexible coupling profile is the decisive factor for the flow-field quality of a supersonic free jet wind tunnel nozzle, and its mechanic dynamic features are the key for engineering implementation of cont…
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Semi-span wind tunnel testing without conventional peniche Open
Low-speed wind tunnel tests of a flexible wing semi-span model have been implemented in the 9×79×7 ft de Havilland wind tunnel at the University of Glasgow. The main objective of this investigation is to quantify the effect of removing the…
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Integrated supersonic wind tunnel nozzle Open
In supersonic wind tunnels, the airflow at the exit of a convergent-divergent nozzle is affected by the connection between the nozzle and test section, because the connection is a source of disturbance for supersonic flow and the source of…
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Droplet Size Distribution Characteristics of Aerial Nozzles by Bell206L4 Helicopter under Medium and Low Airflow Velocity Wind Tunnel Conditions and Field Verification Test Open
To investigate the spray atomization characteristics of aerial nozzles adapted to manned agricultural helicopters under medium-low airflow velocity (0 to 27.8 m/s) conditions, the droplet size test was carried out in both wind tunnel and f…
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A novel approach for artificially generating horizontal wind gusts based on a movable plate: The Paddle Open
The paper is concerned with a novel approach to generate horizontal wind gusts in classical wind tunnels. Assuming an open test section of an Eiffel- or Göttingen-type wind tunnel, the new wind gust generator denoted "The Paddle" can be ea…
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Plasma-Assisted Control of Supersonic Flow over a Compression Ramp Open
This study considers the effect of an electric discharge on the flow structure near a 19.4° compression ramp in Mach-2 supersonic flow. The experiments were conducted in the supersonic wind tunnel SBR-50 at the University of Notre Dame. Th…
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WIND TUNNEL CALIBRATION, CORRECTIONS AND EXPERIMENTAL VALIDATION FOR FIXED-WING MICRO AIR VEHICLES MEASUREMENTS Open
The increase in the number of Unmanned Aerial Vehicles (UAVs) and Micro Air Vehicles (MAVs), which are used in a variety of applications has led to a surge in low Reynolds number aerodynamics research. Flow around fixedwing MAVs has an unu…
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Experimental investigation on a cavity-step-actuated supersonic oscillating jet Open
Wind tunnel testing is conducted at different back pressures in a vacuum-type wind tunnel for a novel supersonic fluidic oscillator which consists of a two-dimensional Laval nozzle, a rectangular cavity and a backward step, to obtain its c…
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CFD/CSD-based flutter prediction method for experimental models in a transonic wind tunnel with porous wall Open
To predict the flutter dynamic pressure of a wind tunnel model before flutter test, an accurate Computational Fluid Dynamics/Computational Structural Dynamics (CFD/CSD)-based flutter prediction method is proposed under the conditions of a …
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Wind Tunnel Experimental Study on the Efficiency of Vertical-Axis Wind Turbines via Analysis of Blade Pitch Angle Influence Open
This paper presents results of experimental investigations and numerical simulations of a vertical-axis H-type wind turbine, considering the influence of propeller blade pitch angle on turbine characteristics. An innovative airfoil profile…