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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 32 for “"pressure coefficients"”.
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Wind pressure coefficients for gable roofs of intermediate slopes
… of Civil Engineers. Local and area-averaged roof pressure coefficients have been obtained from the wind tunnel measurements. Extreme value analysis has been performed to establish the peak pressure coefficient values. This thesis presents a comparative study based on the experimental data, which …
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Frequency Effect on Peak Pressure Coefficients Using the Narrowband Synthesis Random Flow Generator (NSRFG) Method
… dynamics (CFD) have been adopted to study peak pressures produced by wind forces on infrastructure. Once CFD measurements show a good agreement with field measurements and experimental measurements, CFD has the potential to become a cost-effective tool saving time and money. </p> <p>For this …
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Analysis, Simulation and Control of Peak Pressure Loads on Low-Rise Structures
… prism with the objective of reducing extreme pressure coefficients or loads on its surface. In the first part, we use a probabilistic approach to characterize peak loads as measured on a subject house during Hurricane Ivan on 2004. Time series of pressure coefficients collected on the roof of …
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Influence of Turbulence on the Aerodynamics of Low-Rise Buildings
… In order to alleviate the effect, surface pressure coefficients on the roofs have been extensively investigated. This research aims to determine the roof pressures acting on low-rise buildings with consideration of the effects of turbulence (terrain). Pressure measurements, as well as wind …
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Wavelet Analysis of Extreme Wind Loads on Low-Rise Structures
… building codes. However, a simple comparison of pressure coefficients measured in wind tunnel simulations with full-scale measurements show that the simulations, in general, underpredict extreme negative pressure coefficients. One obvious reason is the lack of consensus on wind tunnel simulation …
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The correlation between the special theory of relativity and subsonic compressible fluid mechanics
… the compressible and incompressible local pressure coefficients. Nowhere in the preceding analysis was it necessary to make simplifying assumptions such as small perturbations, etc. It is true that the Sound-Space Theory assumes steady reversible–adiabatic flow and consequently it is to be …
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Wind flow characteristics and their effects on low-rise buildings
… are studied in terms of flow characteristics and pressure-generating mechanisms. Major fmdings contribute to understanding the mechanisms of pressure generation and the roles of turbulence and other properties of the incident wind in loading effects. Much of the debate on wind-tunnel simulation …
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Prediction of Aerodynamic Noise Generated By Wind Turbine Blades
… such as torque generated and trends of pressure coefficients at different span locations are validated against the time averaged experimental results and other results pertaining to the same published in previous computational study. The results obtained through CFD analysis show good …
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The Investigation of an Inboard-Winglet Application to a Roadable Aircraft
… for its flow characteristics by testing for pressure coefficients over the wing and winglet surface in the Virginia Tech Stability Wind Tunnel over a range of freestream velocity and angle of attack. The results were analytically applied to calculate aircraft performance of a roadable …
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A general inverse design procedure for aerodynamic bodies
… have been quite successful in matching target pressure coefficients and reproducing target body shapes.
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Large Eddy Simulation and Wavelet Analysis of the Flow Field around a Surface Mounted Prism
… resulting in secondary separation and severe pressure fluctuations. Moreover, the interaction of the large-scale vortices with the multiplicity of turbulence scales in the incoming wind exacerbates their unsteady motion and hence significantly affects the pressure fluctuations spectra …
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Vorticity Modeling for the Flow Over Surface-Mounted Prisms
… can give satisfactory information about surface pressure fluctuations which are mostly due to the outer or inviscid flow. Differences between results obtained with vorticity modeling and what one should expect from DNS and LES are pointed out. These include the difference between the governing …
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Effects of Mach Number and Flow Incidence on Aerodynamic Losses of Steam Turbine Blades
… investigate the aerodynamic losses of two high-pressure steam turbine nozzles (526A, 525B) subjected to a large range of incident angle and exit Mach number. The blades were tested in a 2D transonic windtunnel. The exit Mach number ranged from 0.60 to 1.15 and the incidence was varied from -34o …
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Recommendations for the analysis and design of naturally ventilated buildings in urban areas
… and analyzed the existing data on wind pressure coefficients in terms of urban morphological parameters, and examined the ow in the urban boundary layer and how it relates to the boundary layer at the rural site of the meteorological station. The information and understanding that …
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Investigation of Pore Pressures During High-Velocity Impact by a Free Fall Penetrometer
… modern FFPs can be equipped with pore pressure sensors. Pore pressure measurements are extensively used in traditional cone penetration testing, but their usage and interpretation is still limited for FFP testing. This thesis represents an effort to advance the interpretation of pore …
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Aerodynamic benefits of boundary layer ingestion for the D8 double-bubble aircraft
… provided flow angles, velocity components, and pressure coefficients. Data were taken at different wind tunnel speeds, and conditions to determine overall performance dependence on non-dimensional power and angle of attack. At the simulated cruise point, the first method gave a measured …
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The relationship between slope stability and pore-water pressure in highly plastic clay in the Carrot River Basin
… showed Φᵣ' ranged from 6.0 to 9.1 °. Pore-water pressure distributions were characterized with models of steady state groundwater flow, drawdown following flooding, and of induced pore-water pressure caused by construction. The flood hydrograph was represented as a total head versus time boundary …
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End depth and flow relationships for smooth open trapezoidal and circular channels
… the momentum equation was used. The velocity and pressure head distributions at the end depth Y$\sb{\rm e}$ were determined to obtain the corresponding velocity and pressure coefficients, (alpha $\alpha$, beta $\beta$ and K). The pressure head readings were obtained through the use of a static …
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Computer Modeling of the Influence of Structure Plan Areas on Tornado Forces
… the tornado maximum diameter, the force and pressure coefficients had the same values as Straight Line (SL) flow. Second, the thin structure plan areas are more likely collapse faster in the presence of a tornado compared to SL flow due to the high differentials pressure in tornado between …
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Experimental and CFD Study of Wind-Induced Response for Bridge Cables with Ice accretion
… were performed to observe the drag, lift and pressure coefficients around the surface of the accreted cable models yawed and inclined at α = 0°, β = 0° and α = 60°, β = 15° under the effect of 10 m/s and 15 m/s wind speed applied for both cases. A verification for galloping divergent …
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