Browsing by Subject "Engineering, Mechanical."
Now showing items 21-40 of 114
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Design and Performance Evaluation of a Retractable Wingtip Vortex Reduction Device
(2019-12)As an airfoil achieves lift, the pressure differential at the wingtips trigger the roll up of fluid which results in swirling wakes. This wake is characterized by the presence of strong rotating cylindrical vortices that ... -
Designing a Substrate Heater for Thin-Film Deposition in High Vacuum
(2020)This thesis outlines the design of a custom substrate heater for use in physical vapor deposition of laboratory thin films. Traditional substrate heaters bring a substrate to temperature through a reliance on the conductive ... -
Development of helicopter attitude axes controlled hover flight without pilot assistance and vehicle crashes.
(2007)In this work, we show how to computerize a helicopter to fly attitude axes controlled hover flight without the assistance of a pilot and without ever crashing. We start by developing a helicopter research test bed system ... -
Directional emittance of emitting, absorbing and scattering media /
(The University of Oklahoma., 1969) -
Distributed product development approaches and system for achieving optimal design.
(2006)The research in this dissertation attempts to provide theoretic approaches and design systems to support engineers who are located in different places and belong to different teams or companies to work collaboratively to ... -
Dynamic buckling of an axially compressed cylindrical shell with discrete rings and stringers /
(The University of Oklahoma., 1972) -
Effect of Planar Preform Density on Properties of Resin Transfer Molded Composites
(2002)The type and volume fraction of fibrous preform used in resin transfer molding has significant influence on the properties of the molded composite parts. In this study, effect of preform architecture and fiber volume ... -
Effect of post-fill pressure and nanoclay on void morphology in resin transfer molded composites.
(2004)Resin transfer molded (RTM) composites usually suffer from the formation of flow-induced defects such as voids. Detrimental effects of voids on performance of molded parts have been studied extensively. Yet, knowledge of ... -
Effects of process parameters and mold design on resin transfer molded composites.
(2004)The effects of flow rate and post-fill cure pressure, i.e., packing pressure, on the mechanical properties of resin transfer molded disks are experimentally investigated. Disks are molded at different flow rates and packing ... -
EHD-enhanced heat and mass transfer.
(2005)To study the mass transfer enhancement by the electric field, experiments have been conducted and the effects of corona wind (V0 = 14-20 kV), corona polarities (positive and negative), and cross-flow (ui = 2.2 m/s) on the ... -
Error estimation and structural shape optimization.
(1998)This work is concerned with three topics: error estimation, data smoothing process and the structural shape optimization design and analysis. In particular, the superconvergent stress recovery technique, the dual kriging ... -
An evaluation of a laterally confined isothermal test technique to estimate the shock behavior of low-strength materials /
(The University of Oklahoma., 1969) -
An experimental and numerical investigation on hydrogen-hydrocarbon composite fuel combustion.
(2000)Experimental measurements and numerical predictions show that the local flame temperature increases with the increase of hydrogen content in the mixture; consequently the NO production increases in the flame. On the other ... -
Experimental and Numerical Studies on the Structural Dynamics of Flapping Beams
(2015-05)The nonlinear structural dynamics of slender cantilever beams in flapping motion is studied through experiments, numerical simulations, and perturbation analyses. A flapping mechanism which imparts a periodic flapping ... -
An experimental and numerical study of diffusion flames in cross-flow and quiescent environment at smoke point condition.
(2003)An experimental and numerical study of a turbulent smoke point diffusion flame in a quiescent and cross-flow condition was performed. The fuel mass flow rate of a turbulent smoke point flame was determined at a quiescent ... -
An experimental and numerical study of evaporation enhancement and combustion in porous media.
(2007)The results showed that the pressure drop across the porous media increased as the coflow air velocity, temperature, and linear pore density of the medium were increased. The measured and predicted surface temperatures of ... -
An experimental and numerical study of gas jet diffusion flames enveloped by a cascade of venturis.
(1999)The thermal and composition fields of the baseline and venturi-cascaded flames were numerically simulated using CFD-ACE+, an advanced computational environment software package. The CO and NO concentrations were determined ... -
Experimental Measurement and Modeling of Thermal Conductivities of Carbon Fibers and Their Composites Modified with Carbon Nanofibers
(2014-05-09)Carbon fiber reinforced composites (CFRCs) show superior thermal performance along the fiber direction due to high thermal conductivity of carbon fiber in the fiber direction. However, these composites suffer from poor ... -
Fabricating High-Quality Structural Composite Laminates and Tailoring Their Surface Microstructure by Applying Magnetic Pressure and Magnetic Field
(2019-05-10)Advanced fiber reinforced polymer (FRP) composites are widely used in structural applications due to their high specific strength and stiffness. Generally, high-quality, advanced FRP composites are produced using an ...