Theses/Dissertations - Mechanical Engineering
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Modal analysis of aerospace and geophysical boundary layers.
(2018-04-20)A linear stability code was written and used to calculate the stability of surface and bottom Ekman layers. Then, the stability of a water column containing both a surface and bottom Ekman layer was calculated to investigate ... -
Effect of inlet hole geometry on surface film cooling effectiveness from compound angle, shaped holes.
(2018-01-05)The gas turbine engine operates at temperatures that far exceed the melting point of the metals from which they are made. Cooling air from the high pressure compressor must be used to cool the components in the hot sections ... -
A method for replicating ice accretion roughness using multi-scale analog distributions.
(2018-03-23)A new approach of creating an analog surface for a surface with natural roughness is presented based on the hypothesis that the dominant skin friction and heat transfer augmentation mechanisms are 1) the vortex shedding ... -
Can changing running shoes immediately reduce the risk of tibial stress fractures?
(2018-04-23)Running is becoming a more popular sport worldwide however many runners suffer from tibial stress fractures (TSF). While there are various kinematic, kinetic, and anthropometric risk factors associated with TSF, it is ... -
Convection from ice roughness surfaces using scaled Reynolds numbers for larger NACA 0012 airfoils.
(2018-04-24)Ice accretions that develop on aircraft surfaces during flight adversely impact performance by increasing weight and drag, while also decreasing lift and stall margin. Previous studies at Baylor University characterized ... -
Thermal boundary layer measurements using planar laser induced fluorescence.
(2018-04-09)An experimental arrangement of toluene-based Planar Laser Induced Fluorescence (PLIF) has been developed and applied to the study of free and impinging jets formed with air. In the toluene-based PLIF experiment, the flow ... -
The effects of fiber orientation on stiffness and thermal expansion of large volume, anisotropic, short-fiber, composite material fabricated by Fused Filament Fabrication.
(2017-09-14)Fused Filament Fabrication (FFF) is a rapidly improving 3D printing technology that can be used for manufacturing complex parts. The properties of these parts can be improved by adding short-fibers to the polymer feedstock. ... -
Convection from laser-scanned ice roughness at multiple accretion vent times.
(2017-11-15)Ice accretions degrade aircraft flight safety and performance by decreasing the lift and stall angle, increasing the drag, and increasing the aircraft weight. A recent study found that the commonly used realistic ice ... -
Annual energy use of series and parallel fan powered terminal units.
(2017-12-06)Traditional mass and energy balance component models of fixed and variable airflow series and parallel fan powered terminal units (FPTUs) were used to estimate the annual energy use in a small office building with hourly ... -
Linear stability analysis of Mach 10 nitrogen flow over 7-deg half-angle cones.
(2017-08-02)Linear stability theory (LST) analysis was performed on Mach 10 7-degree half-angle straight cones in nitrogen for comparison with experimental results obtained in the Arnold Engineering Development Complex (AEDC) Hypervelocity ... -
Three dimensional topology optimization with orthotropic material orientation design for additive manufacturing structures.
(2017-08-02)Products produced with Additive Manufacturing often have anisotropic microstructures that form material layers are added during processing. Carbon fiber filled polymer deposited in beads with the Fused Filament Fabrication ... -
Characterizing hip motion during activities of daily living.
(2017-07-27)In the United States alone, 332,000 people received a total hip replacement (THR) each year [1 – need to reattach ref]. Following a total hip arthroplasty, doctors get asked by their patients if they can still do particular ... -
Nondestructive inspection and characterization of complex engineering materials via ultrasound techniques.
(2017-06-19)Nondestructive evaluation methods have grown increasingly popular and necessary in a variety of industries. For example, the aerospace industry uses such techniques to inspect aircraft components for damage prior to making ... -
Design and implementation of a synthetic aperture radar (SAR) imaging system using an ultra-wideband (UWB) radar sensor.
(2016-04-14)This thesis documents the design and implementation of a radar imaging system. A rail system was constructed to control the location of an off-the-shelf ultra-wideband (UWB) radar along a linear path. Range imaging, ... -
Effects of the dynamic human body on electromagnetic wave propagation for on-body wireless communication.
(2016-04-06)Wireless Body Area Networks (WBANs) have the potential to provide long-term remote health monitoring for the prevention of impending health problems through the constant relaying of data to health professionals. In order ... -
Damage accumulation of bovine bone under variable amplitude loads.
(2016-01-15)Stress fractures, a painful injury, are caused by excessive fatigue in bone. This study into damage accumulation in bone sought to determine if the Palmgren-Miner rule (PMR), a well-known linear damage accumulation ... -
Simulation of dynamic on-body wave propagations : comparison with measured values.
(2016-03-31)Wireless body area network (WBAN) technology shows potential for improving human quality of life by facilitating remote, long-term health monitoring. Designing small, wearable, and power efficient on-body WBAN sensors ... -
Assessment of shaped film cooling holes at high density ratios for gas turbine cooling using S-PIV and PSP.
(2016-02-27)During film-hole cooling, relatively cold air is extracted from the compressor of a gas turbine engine and forced through the turbine airfoils in order to lower their surface temperatures. To investigate the effects of ... -
The design of small propellers operating at low Reynolds numbers and associated experimental evaluation.
(2015-07-29)Small-scale Unmanned Aerial Systems (UASs) are becoming increasingly important in the field of intelligence, surveillance, and reconnaissance. As the desire for higher payloads and longer flight times increases, so does ... -
Applying mass and energy balances to model series and parallel fan-powered terminal units.
(2015-07-31)Performance data from four manufacturers of fan-powered terminal units was analyzed and simple models of the fan/motor power use developed. These data included two fan motors: permanent split capacitor motors with silicon ...
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