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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 183 for “"surface pressure"”.
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Air data and surface pressure measurement for hypersonic vehicles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Statistical Scaling of Turbulent Surface Pressure in the Atmospheric Boundary Layer
… the atmosphere produces fluctuations in static pressure through a variety of mechanisms. These fluctuations are of interest both to atmospheric scientists, as a fluid dynamic property, and to acousticians, as a source of wind noise. At the ground surface, previous work has found the dominant …
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Large Eddy Simulation Of Surface Pressure Fluctuations Generated By Elevated Gusts
… velocity events, such as gusts, may trigger pressure fluctuations on the ground. If that is true, it should be possible to monitor elevated wind gusts by measuring these pressure fluctuations. The goal of this project is to develop a ground based detector that monitors the behavior of …
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Effects of a Heated Turbulent Boundary Layer on Surface Pressure Fluctuations
Recent work has shown that spatial correlation of surface pressure fluctuations in a fully turbulent atmospheric boundary layer (ABL) can give information about the velocity field and turbulence. This is of particular importance to the future of wind energy to predict the incoming velocity flow …
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Surface pressure prediction by means of statistics and the vorticity principle
Thesis: M.S., Massachusetts Institute of Technology, Department of Meteorology, 1960
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The Rough Wall High Reynolds Number Turbulent Boundary Layer Surface Pressure Spectrum
… very few studies investigating the rough wall pressure spectra under fully rough flows, which are relevant to many common engineering applications operating within this regime. This investigation uses the Virginia Tech Stability Wind Tunnel to perform experiments on a series of high Reynolds …
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An Experimental Investigation of Unsteady Surface Pressure on Single and Multiple Airfoils
… dissertation presents measurements of unsteady surface pressure on airfoils encountering flow disturbances. Analysis of measurements made on an airfoil immersed in turbulence and comparisons with inviscid theory are presented with the goal of determining the effect of angle of attack on an …
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Fluid Dynamics and Surface Pressure Fluctuations of Turbulent Boundary Layers Over Sparse Roughness
Turbulent boundary layers over rough surfaces are a common, yet often overlooked, problem of practical engineering importance. Development of correlations between boundary layer parameters that can be used in turbulence models and the surface geometry is the only practical option for solving these …
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An instrumented prosthesis for measuring the cartilage surface pressure distribution in the human hip.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. Sc.D.
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Analysis of surface pressure and velocity fluctuations in the flow over surface-mounted prisms
… the statistical properties and prediction of pressure peaks. The second involves the identification of linear and nonlinear relations between pressure peaks and associated velocity fluctuations. The first part of this thesis is concerned with the statistical properties of surface pressure time …
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Description of Coherent Structures in the Atmospheric Boundary Layer By Model Reduction of the Surface Pressure
… by model reduction. To this end, an array of pressure transducers was deployed on the ground at Reese Technology Center in Lubbock, Texas, and the pressure fluctuations were recorded over nearly two diurnal cycles. A program for computation of the dynamic mode decomposition was developed with …
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Structure of Turbulent Boundary Layers and Surface Pressure Fluctuations on a Patch of Large Roughness Elements
Measurements were made in a zero pressure gradient turbulent boundary layer over two roughness patches containing hemispherical and cubical elements. The elements were 3 mm in height and spaced 16.5 mm apart in an array containing 7 streamwise rows and 6 spanwise columns for a total of 42 elements …
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Some features of surface pressure fluctuations in turbulent boundary layers with zero and favorable pressure gradients
… are interested in the structure of the surface pressure fluctuations for the development and use of noise prediction techniques for helicopter and turbomachinery rotors. This study, conducted in the Virginia Tech low speed boundary layer wind tunnel, covered the effects of zero and …
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Fluid Dynamics and Surface Pressure Fluctuations of Two-Dimensional Turbulent Boundary Layers Over Densely Distributed Surface Roughness
Measurements were made in two-dimensional zero pressure gradient turbulent boundary layers over 5 geometries of three-dimensional densely distributed surface roughness. A 3-velocity component laser Doppler velocimeter was used to measure instantaneous velocities. These measurements permitted an …
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Involute and Non-Involute Conjugate Spur Gears: Their Load Capacities Based on Maximum Surface Pressure, Sliding Velocity, and Condition of Lubrication
Made available in DSpace on 2014-12-09T17:13:39Z (GMT). No. of bitstreams: 1 6607718.pdf: 4377452 bytes, checksum: bf3eb7eef22bb287bdd788caa908f894 (MD5) Previous issue date: 1966
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Synthesis of Tooth Profiles and Gears for Increased Load Capacity Based Upon Hertz Surface Pressure Considering Contact Ratio and Bending Strength
Made available in DSpace on 2014-12-09T17:13:46Z (GMT). No. of bitstreams: 1 6901382.pdf: 8015585 bytes, checksum: b83448d0ef299978601f6a5c957b4b49 (MD5) Previous issue date: 1968
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Mean Loading and Turbulence Scale Effects on the Surface Pressure Fluctuations Occurring on a NACA 0015 Airfoil Immersed in Grid Generated Turbulence
Detailed surface pressure measurements have been made on a NACA 0015 immersed in two grid generated homogenous flows at Re = 1.17 x 10⁶ for a = 0°, 4°, 8°, 12°, 16°, and 20°. The goal of this measurement was to reveal and highlight mean loading and turbulence scale effects on surface pressure …
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Pressure Shielding Mechanisms in Bio-Inspired Unidirectional Canopy Surface Treatments
Reduction of surface pressure fluctuations is desirable in various aerodynamic and hydrodynamic applications. Over the past few years, studies on canopy surface treatments have been conducted to investigate the fundamental mechanisms of surface pressure attenuation termed as pressure shielding. …
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An Experimental Investigation of Pressure Fluctuations in Three-Dimensional Turbulent Boundary Layers
… experimental measurements and analysis of the surface pressure fluctuations beneath several turbulent boundary layers of practical interest. Pressure fluctuations in turbulent boundary layers are a source of noise and vibration that can accelerate structural fatigue. Pressure fluctuations and …
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