• General equation for predicting cooling tower approach temperatures at lower wetbulbs 

  Cottrell, Benjamin Joseph (University of Alabama Libraries, 2020)

  Cooling tower approach temperature is the difference in leaving water temperature and entering air wet-bulb temperature. Cooling tower manufacturers describe the design capacity with water volumetric flow, entering water ...
• Numerical analysis of a Wells turbine with flexible trailing blade edges 

  Kincaid, Kellis (University of Alabama Libraries, 2020)

  This thesis examines the effect of a partially morphing blade on the performance of a Wells turbine, for the purpose of wave energy conversion. A numerical model is constructed using Foam-Extend, v4.0, incorporating a fluid ...
• Structure-property-process relations of solid-state additively manufactured aerospace aluminum alloys 

  Mason, Craig Joseph Taylor (University of Alabama Libraries, 2020)

  Additive manufacturing processes provide new avenues to additively repair or manufacture complex aerospace components. There has been limited success in additively manufacturing aluminum alloys and aluminum metal matrix ...
• Investigation of methane-fueled rotating detonation combustor exhaust flow field via time-resolved particle image velocimetry 

  Depperschmidt, Daniel (University of Alabama Libraries, 2019)

  Rotating detonation combustors (RDCs) as a form of pressure gain combustion (PGC) have received increased research attention in the power generation and aerospace/defense propulsion fields due to the potentially substantial ...
• As-deposited microstructure and tensile behavior of solid-state additive manufactured Ti–6Al–4V 

  Miller, Mary Olivia (University of Alabama Libraries, 2019)

  Ti–6Al–4V (Ti64) is the most widely used titanium alloy on the market today due to its high strength-to-weight ratio and excellent corrosion resistance. Because of expensive Ti64 material costs, fusion based additive ...
• Natural Gas/Diesel Dual Fueling of a Prechamber Type Diesel Engine 

  Ramsey, Charles Burton Jr (University of Alabama Libraries, 1990)

  The diesel engine, or the compression ignition engine, was invented by Dr. Rudolph Diesel, who patented the device in 1892. Diesel's patent covered the use of coal dust as a fuel, but also included other solid, liquid, or ...
• Finite element based simulation of phased composite material for aircraft design 

  Alegre, Adrian (University of Alabama Libraries, 2019)

  Composite materials are frequently used in the aircraft and aerospace industries for cre ating lighter, stronger and cheaper materials. In short, a composite material is a material made up of two or more constituent materials ...
• Numerical modeling of laser-induced plumes and jets 

  Palya, Austin (University of Alabama Libraries, 2019)

  The goal of the current work is to perform numerical modeling and identify important phenomena associated with vapor plume and jet flows induced by irradiation of metal targets with short pulse or continuous wave (CW) ...
• Characterization of the evolution of 2219-T87 aluminum as a function of the self-reacting friction stir welding process 

  Anderson, Kathryn (University of Alabama Libraries, 2019)

  The self-reacting friction stir welding (SR-FSW) process is a primary method used by NASA to construct the Space Launch System (SLS) vehicle. This method uses large scale shear to plastically deform and mechanically mix ...
• A kinematic analysis of a stacked planar compliant tensegrity mechanism 

  Tanouye, Miranda (University of Alabama Libraries, 2019)

  tensile members (strings). Compliant tensegrity mechanisms (CoTM) introduce springs alongside strings and rods, allowing these structures to be more adaptable and robust. The kinematic and stability analyses of such ...
• Exergy analysis of in-cylinder combustion and exhaust processes in internal combustion engines 

  Mahabadipour, Hamidreza (University of Alabama Libraries, 2019)

  The exergy analysis is a powerful tool for investigating thermodynamic irreversibilities and to identify pathways for improving efficiencies of energy systems, including internal combustion (IC) engines. The present study ...
• Exergy Analysis of In-Cylinder Combustion and Exhaust Processes in Internal Combustion Engines 

  Mahabadipour, Hamidreza (The University of Alabama Libraries, 2019)

  The exergy analysis is a powerful tool for investigating thermodynamic irreversibilities and to identify pathways for improving efficiencies of energy systems, including internal combustion (IC) engines. The present ...
• Model-based estimation on building envelope infiltration 

  Hao, Zhengwen (University of Alabama Libraries, 2019)

  Buildings consumed nearly 40% of total energy in the U.S. Air leaks through the building envelope are one of the factors increasing building energy consumption. The estimated energy use associated with infiltration loss ...
• Understanding the fatigue and fracture mechanisms of cold spray additive repairs 

  White, Benjamin (University of Alabama Libraries, 2019)

  The objective of this research is to understand the underlying mechanisms associated with fatigue and fracture in additive cold spray (CS) repairs of structural components. Because of the low temperatures maintained during ...
• Energy analytics and machine learning modeling in milling of difficult-to-machine alloys 

  Liu, Ziye (University of Alabama Libraries, 2019)

  Manufacturing consumes approximately 20% of total energy consumption in the U.S. Energy consumption in machining, an important manufacturing cluster, is substantial, contributes to a large fraction of manufacturing cost, ...
• Comprehensive analysis and improvement of efficiency, emissions and electrical power quality of a small, portable, gasoline-fueled generator system 

  Greff, Andrew (University of Alabama Libraries, 2019)

  The goal of this dissertation is to explore the methods of improving a small portable gasoline-fueled generator by increasing the efficiency and power quality and also reducing emissions. Advanced engine control strategies ...
• Quantifying volumetric distribution of fuel mass in a transient high pressure reacting spray via the application of rainbow schlieren deflectometry 

  Depperschmidt, Ross (University of Alabama Libraries, 2018)

  The fuel atomization, evaporation and subsequent mixing process with ambient air during fuel injection in a direct injection internal combustion (IC) engine are crucial to subsequent combustion and engine performance. ...
• Numerical and thermodynamic analysis of external flow over tube banks for waste heat recovery 

  Erguvan, Mustafa (University of Alabama Libraries, 2018)

  This study will involve numerical energy and exergy analyses for unsteady cross flow over heated circular cylinders. Several simulations were conducted using Ansys FLUENT 18.2 with different values of Reynolds number, inlet ...
• A study of droplet velocity and diameter measurements in a reacting diesel spray produced by a flow-blurring injector 

  Gokmen, Yasin (University of Alabama Libraries, 2018)

  In many combustion applications such as gas turbines, liquid fuel atomization is important to obtain lower emissions of nitrogen oxides (NOx), carbon monoxide (CO), unburned hydrocarbons (UHCs), and soot particles. Thus, ...
• Fatigue characterization and microstructure-sensitive modeling of extruded and friction stir welded aluminum lithium alloy 2099 

  Cisko, Abby (University of Alabama Libraries, 2018)

  Technological and design advances in military aircraft have dramatically changed the face of war. The need to rapidly deploy troops, military equipment and technology into conflict areas all over the globe, have placed ...

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