Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 180 for “"TEST SECTION"”.
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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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An investigation of velocity distribution in test section of Wright Brothers Wind Tunnel
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1939.
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STUDY OF AIR BUBBLE INJECTION INTO LAMINAR AND TURBULENT WATER FLOW THROUGH AN ANNULAR TEST SECTION
… visualization system was set up in a vertical test section with a high speed video camera. A PIV measurement technique was also used to determine laminar and turbulent velocity profiles in the liquid stream. In this study, an efficient image processing methodology was used to obtain the …
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Optimization of Flow Quality In the Test Section of The 30-Inch x 40- Inch Subsonic Tunnel
… a non-uniform velocity distribution across the test section. By utilizing a hot-film anemometer system and a total pressure rake, turbulence and velocity distribution data were obtained. Rounded corners and a turning vane were installed in front of the inlet to minimize boundary layer …
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Development of a test section featuring a flat plate conditioned for the study of fully developed turbulent boundary layers using PIV
… to describe the logic behind the extension of a test section in a facility that was designed for studying fully developed turbulent boundary layers in wall-bounded flow, primarily using Particle Image Velocimetry (PIV). The initial section will focus on providing motivation of why it can be of …
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Design and development of a continuous, open-return transonic wind tunnel facility
… Illinois at Urbana-Champaign campus to enhance testing capabilities of the transonic flow regime. The new tunnel will expand the experimental capabilities available to the Department of Aerospace Engineering at UIUC for studying and understanding topics such as compressible dynamic stall …
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Turbulence measurements and noise generation in a transonic cryogenic wind tunnel
… was used to measure dynamic flow quality in the test section of the NASA Langley 0.3-m Transonic Cryogenic Tunnel. The probe measures fluctuating stagnation (total) temperature and pressure, static pressure, and flow angles in two orthogonal planes. Simultaneous unsteady temperature and pressure …
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A Study of Aerodynamics in Kevlar-Wall Test Sections
… the aerodynamic behavior of Kevlar-wall test sections and specifically those containing two-dimensional, lifting models. The performance of the Kevlar-wall test section can be evaluated against the standard of the hard-wall test section, which in the case of the Stability Wind Tunnel …
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Behavior of the Embedded Phase in a Shock-Driven Two-Phase Flow
… pre-mixed with air, and slowly injected into the test section of the shock tunnel. Two test sections are evaluated during the course of this study. Each test section is constructed of square, transparent polycarbonate with internal cross section of 7.62 cm. The first test section contains features …
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Aerodynamics and Acoustics of the Virginia Tech Stability Tunnel Anechoic System
… the need for a free jet and jet catcher. To test this concept a series of measurements were performed both to validate the reduction in overall test section noise levels and to ascertain the effect of these modifications on the test section aerodynamics. An extensive program of experiments …
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A Basic Three-Dimensional Turbulent Boundary Layer Experiment To Test Second-Moment Closure Models
… gradients are generated as a result of the test section wavy side wall shape. Each side had six sine waves with a trough to peak magnitude to wavelength ratio of 0.25. Boundary layer control was used so that the flow over the side walls remains attached. The mean flow velocity components, …
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Rail shear testing of composite materials: analysis and experiment
… discusses the results of both an experimental test program and a finite element analysis of selected graphite/polyimide rail-shear test specimens. The two-dimensional finite element analysis includes both mechanical and thermal loading (differential expansion) of the specimens and their elastic …
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Design and flow characterization of an indraft supersonic wind tunnel for scramjet testing
… goal of this research is to develop a ground testing platform for studying airbreathing hypersonic propulsion systems. Problems of interest include design of isolators, fuel injection systems, ignition and flame stabilization, shock-boundary layer interaction, and aero-thermo-elastic …
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The design of an apparatus to determine the film coefficient of water at high heat fluxes
… deionized water through an electrically heard test section which is a stainless steel tub, 0.465 in O. D. x 0.020 in. thickness x 5ft length, where the fluid temperature, surface temperature and fluid pressure are measured by thermocouples and pressure gages. The electrical power to the test …
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Design and Characterization of a High pressure Flow Loop for Heat Transfer Experiments of Supercritical Carbon Dioxide
… of sCO2 under diverse boundary conditions and test section geometries. Key components of the loop include the test section, constant temperature bath, pump, flow meter, and pre-heater, all designed and rigorously validated to ensure precise experimental conditions within this research. The loop …
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The Design, Fabrication, and Evaluation of a Low-Speed, Low-Turbulence, Anechoic Wind Tunnel
<p>In order to provide a means for testing noise reduction techniques in propellers and fans, a low-speed, low-turbulence, anechoic wind tunnel was designed, fabricated and evaluated at Embry-Riddle Aeronautical University.</p> <p>This open circuit wind tunnel was designed using several other …
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Dynamic flow quality measurements in a transonic cryogenic wind tunnel
… pressure sensors. The aspirating probe was tested in the 0.3-m Transonic Cryogenic Tunnel (TCT) at NASA-Langley Research Center. Stagnation pressure and temperature measurements were taken in the free-stream of the settling chamber and test section. Data were also obtained in the unsteady …
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Benchmarking of a sCO2 Heat Exchanger Flow Loop
… counterflow heat exchanger with a circular cross section. The main objective was to establish experimental heat transfer research capabilities for sCO2 at Embry-Riddle Aeronautical University’s (ERAU) Thermal Science Lab. sCO2 experiences a drastic change in thermophysical properties near its …
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Conceptual Design and Instrumentation Study for a 2-D, Linear, Wet Steam Turbine Cascade Facility
… for larger and more efficient turbines. The tip sections of these LP turbines encounter condensing wet steam at high velocities resulting in increased losses. These losses are difficult to predict with computational fluid dynamic models. To study these losses and improve the design of LP turbines …
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Barrel wear reduction in rail guns : an investigation of silver paste liquid-metal interface
This thesis tests the effects a commercial silver paste has on the damage at the projectile-rail interface of a 4" long rail gun test section. Projectiles (0.635 x 0.635 x 0.953 cm) were pushed through the rail test section at 34 Å 19 m/s, while average current densities of 18-32 kA/cm2 was passed …
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