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Showing 1 to 20 of 31 for “"Supersonic Wind Tunnel"”.
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Supersonic wind-tunnel : nozzle design and control system analysis
… two-dimensional nozzles were designed for the supersonic wind-tunnel, in the Department of Mechanical Engineering, using both analytical and semigraphical methods obtained from the theory of Characteristics. These nozzles, designed for an optimum running time of 30 seconds, at a Mach number of …
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Design and flow characterization of an indraft supersonic wind tunnel for scramjet testing
… thesis describes the Colorado State University supersonic wind tunnel design, manufacture, assembly, and validation. The overarching goal of this research is to develop a ground testing platform for studying airbreathing hypersonic propulsion systems. Problems of interest include design of …
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Comparison of Strain Gage and Fiber Optic Sensors On A Sting Balance In A Supersonic Wind Tunnel
… and calculation of aerodynamic properties during wind tunnel testing. With the recent advancements of technology, new fiber optic sensors have been designed to replace the conventional foil strain gage sensors commonly found on balances, thereby offering several distinct advantages. The use of …
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Design and development of a rectangular supersonic wind tunnel facility for the study of shock/boundary layer interactions
… work of this thesis was part of the low-boom supersonic inlet project conducted by NASA, Gulfstream Aerospace Corporation, Rolls-Royce, and the University of Illinois. The low-boom supersonic inlet project itself was part of a new supersonic business jet design. The primary goal of the …
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Cold Flow Performance of a Ramjet Engine
… modular ramjet attachment to the Cal Poly supersonic wind tunnel is presented. The design of a modular inlet, combustor, and nozzle are studied in depth with the intentions of testing in the modular ramjet. The efforts undertaken to characterize the Cal Poly supersonic wind tunnel and the …
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Aspirating probes for measurement of mean concentration and fluctuating quantities in supersonic air/helium shear layer
… probes are developed to make measurements in supersonic air/helium shear layers. The first probe is designed to measure local mean gas composition and is referred to as the mean concentration probe. This probe consists of a constant temperature hot-film sensor operating in a channel with a …
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Study of Rubber Damped Skin Friction Gages for Transonic Flight Testing
… testing was performed on in the Virginia Tech supersonic wind tunnel at shear levels of tw = 3.9 to 5.3 psf in a Mach 2.4 flow. Skin friction values in good agreement with previous testing and analytical predictions were obtained from the tests with adequate damping in the low vibration …
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UNSTEADY PRESSURE MEASUREMENTS IN A SUPERSONIC INLET DURING UNSTART SIMULATIONS
… understanding the performance and stability of supersonic systems. This thesis will investigate the unsteady pressure measurements within a supersonic inlet during unstart. By using a model developed by Ben Nikaido, Kulites were installed to record output voltages that were converted into …
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Design, construction and characterization of a wind tunnel
The wind tunnel is the most fundamental test equipment for aircraft testing and studying aerodynamics. Because of the complexity of the test-subject's geometry, it is difficult to study the aerodynamic pattern simply based on theoretical calculations. Most of the aerodynamics experiments still use …
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The Design and Construction of a 20" x 20" Mach 2.0 Blowdown Wind Tunnel to Characterize the Lift and Drag of Irregularly Shaped Fragments
A supersonic wind tunnel, with a 20" x 20'" test section cross sectional area, was designed and constructed at the Techsburg Wind Tunnel Facility in order to determine the lift and drag on irregularly shaped fragments in supersonic flow. Prior to beginning the wind tunnel design process, a blowdown …
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Design, Analysis, and Initial Testing of a Fiber-Optic Shear Gage for 3D, High-Temperature Flows
… under these conditions. Repeated cold-flow wind tunnel tests at Mach 2.4 with a stagnation pressure from 3.7-8.2 atm (55-120 psia) and ambient stagnation temperature (Re=6.6x107/m) and Mach 4.0 with a stagnation pressure from 10.2-12.2 atm (150-180 psia) and ambient stagnation temperature …
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The effects of pressure waves on turbulent oblique shock wave boundary layer interactions in rectangular channels
… applications, such as in mixed compression supersonic jet intakes and transonic compressor cascades and can have significant detrimental effects on the downstream boundary layer, resulting in flow distortion, increased turbulent fluctuations, and pressure losses. They often occur near to a …
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Stereoscopic PIV measurements and proper orthogonal decomposition of a supersonic axisymmetric base flow
The supersonic flow separating past a cylindrical afterbody generates a complex, compressible and highly turbulent flowfield. This flow models several realistic applications, such as the wake region behind projectiles, bullets and unpowered rockets. A blowdown-type supersonic wind tunnel built …
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Study of Skin Friction and Surface Regression Interaction via the Naphthalene Sublimation Technique
… Aerospace Turbulent Boundary Layer Research supersonic wind tunnel. The plate and sensor configuration was subjected to three subsequent tunnel runs at Mach 2.31. This process was repeated at plenum pressures of 0.35 MPa and 0.69 MPa, which correspond to Reynolds Numbers of 1.4x10^7/m and …
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Floating head skin friction gage measurements in supersonic flows
… motion. The shearing force caused by the supersonic flow deflects the floating head parallel to the flow direction. Strain gages mounted across a small gap between the bottom of the floating element and the bottom clamp provide the restoring force on the floating head. These strain gages …
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Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels
To realize supersonic combustion of hydrocarbons, an effective atomizer-igniter combination with the capabilities of fuel preheating, atomization, penetration, mixing, ignition and flameholding is desired. An original design concept incorporating these capabilities was built and tested at Virginia …
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Evaluation of a Strut-Plasma Torch Combination as a Supersonic Igniter-Flameholder
… Scramjets may be a solution to this problem. Supersonic combustion is one of the main challenges involved in the operation of a Scramjet engine. In general, both an igniter and a flameholder are needed to achieve and maintain supersonic combustion. The current work examines a plasma …
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An experimental study of the aft guide vanes of an engine bypass nacelle for low-boom supersonic flight
… the large disturbance created by the sonic boom, supersonic flight is strictly controlled by the FAA. One way in which to minimize the sonic boom is through shape-tailoring of the aircraft body and of the propulsion system. To this end, a new supersonic engine concept has been proposed, wherein a …
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Development of Fiber Optic Aerodynamic Sensors for High Reynolds Number Supersonic Flows
… and heat flux in high Reynolds number, supersonic flow. Using a standard fiber optic signal conditioning unit (specifically a broadband interferometric system using spectra), the work centered around determining under what conditions these sensors will work effectively and quantifying …
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