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 36 for “"hot-film"”.
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A theory for the performance of hot-film shear stress probes
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Design and characterization of robust hot film sensors for tactial aircraft inlets
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Unsteady hot-wire and hot-film wake measurements of automobile-like bluff bodies
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Measurement of oil-water flows in deviated pipes using thermal anemometry and optical probes
… are known as the dual probe and the dual split-film probe. The dual probe is a combination of a hot-film anemometer and two optical probes. One of the optical probes was used to simplify the analysis of hot-film signals. The dual split-film probe is similar to the dual probe except that it uses …
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Turbulence measurements in drag reducing flow
"Studies of the frequency response of hot-film wedge probes in viscoelastic fluids established their reliability as measuring devices and demonstrated that the objections raised by Metzner and Astarita (77) are not valid for wedge probes. The structure of turbulence in drag reducing soap and …
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Aspirating probes for measurement of mean concentration and fluctuating quantities in supersonic air/helium shear layer
Two aspirating hot-film 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 …
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Aerodynamic Measurements in a Wind Tunnel on Scale Models of a 777 Main Landing Gear
… and with Noise Control Devices respectively). Hot-film, Pitot-static measurements and flow visualization using tufts were performed over an isolated 26% scale-model high fidelity landing gear for the "Baseline" and "NCD" configurations. Contours of turbulence intensity, normalized wake velocity …
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Inlet flow-field measurements of a transonic compressor rotor prior to and during steam-induced rotating stall
… prior to and during a steaminduced stall. Hotwire measurements of the inlet flow field were taken to determine an inlet turbulence intensity of 2-3% during both subsonic as well as transonic compressor operation. A 95% speed line was established from data taken from open throttle to near …
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The Design, Fabrication, and Evaluation of a Low-Speed, Low-Turbulence, Anechoic Wind Tunnel
… <p>Tufts of yarn, a pitot-static tube, and a hot film anemoter were used to determine the flow characteristics in the test section of this wind tunnel. From the hot film anemometer, values of velocity, standard deviation and turbulence intensity were determined for three different velocity …
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A study of column separation accompanying pressure transients in an aviation kerosene pipeline
… peaks following cavity collapse.Observation and filming of the sequence of events downstream of the valve during and following closure indicated that the air released during initial separation remained out of solution. The effect of this air was significant but could be included, in terms of its …
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The Effects of Vortex Generator Jet Frequency, Duty Cycle, and Phase on Separation Bubble Dynamics
… image velocimetry and substantiated with a hot-film anemometer were used to answer fundamental questions about the influence of VGJs on a separated boundary layer. The data were collected on the suction surface of the Pack B blade profile, which has a non-reattaching separation bubble …
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Scaling and Performance of a Device for Fluidized Bed Entrainment Reduction
… stream. Air velocity was measured with a rugged hot film anemometer.
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Laser Doppler velocimeter measurements in a turbulent junction vortex
… and five-hole pressure probe measurements and hot film measurements. Comparisons with the Conrad probe results were made in a two-dimensional turbulent boundary layer, and with the five-hole probe results for the plane of symmetry junction vortex flow at six stations in the upstream region and …
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A three-dimensional turbulent boundary layer upstream and around a junction vortex flow
… and direction were measured with a single hot film probe. Measurements of the complete Reynolds stress tensor were carried out with three hot film x-array probes. Supporting work includes a wind tunnel calibration which examined the sensitivity and effects of spanwise nonuniformities and a …
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Study of Turbulent Structure Close to a Wall Using Conditional Sampling Techniques
… components in the fluid were measured by a hot-film X-probe.
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Hotwire measurements of the turbulent flow into a cascade of controlled-diffusion compressor blades
… made in a subsonic cascade wind tunnel with a hotwire system. Using a single hot-film probe, velocity and turbulence distortion data were obtained about the leading edge of the Controlled-Diffusion (CD) blades in order to verify Laser Doppler Velocimetry (LDV) data taken in earlier studies. …
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Evaluation of exhaust flowrate measurement techniques for a mobile emissions monitoring system
… evaluated were an Annubar, an Accutube, a hot film anemometer, a Pitot static tube, a venturi, and a vortex shedder.;The evaluation of the devices was broken down into two parts, the first part included cold bench testing and the second engine testing. The venturi was found to be the best …
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Mixing of Liquids in Large Tanks
… have also been made of fluid velocities using a hot film anemometer, and these are shown to be consistent with a simple boundary layer theory.
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Skin Friction and Cross-flow Separation on an Ellipsoidal Body During Constant Yaw Turns and a Pitch-up Maneuver with Roll Oscillation
… Stability Wind Tunnel slotted wall test section. Hot-film sensors with constant temperature anemometers provided skin friction magnitudes on the body's surface for thirty-three steady flow model orientations and three unsteady maneuvers at a constant Reynolds number of 2.5 million. Cross-flow …
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Studies of Vortex Breakdown and its Stability in a Confined Cylindrical Container
… The experiments included flow visualization and hot-film measurements, and the numerical simulation included the solution by solving axisymmetric and the three-dimensional Navier-Stokes equations. The thesis offers detail investigations on the following specific issues: spiral vortex breakdown …
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