• 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 ...
• An innovative fault analysis framework to enhance building operations 

  Li, Yanfei (University of Alabama Libraries, 2018)

  This study proposes a failure analysis framework to enhance the building operations. A literature review was conducted for fault modeling and the fault mode and effect analysis (FMEA) applications to the building technology ...
• Using inverse regression models to create gray box models for industrial facilities 

  Carpenter, Joseph (University of Alabama Libraries, 2018)

  Industrial facilities account for approximately one third of energy usage in the world, and effective energy assessments of these facilities require a reliable baseline energy model. Commercial and residential buildings ...
• Fatigue behavior of additive friction stir layer welding of Az31 magnesium alloy 

  Wlodarski, James Schuyler (University of Alabama Libraries, 2018)

  This work examines the fatigue behavior of additive friction stir layer welding (AFSLW) of AZ31 Mg Alloy. The AFSLW process was used to fabricate a seven-layer build using 5 mm thick plates of AZ31 Mg alloy. Optical ...
• Plasticity-damage modeling of strain rate and temperature dependence of aluminum alloy 7075-t651 

  Mason, Craig Joseph Taylor (University of Alabama Libraries, 2018)

  This is the first study to correlate the observed damage evolution of ambient (298 ºK) and elevated temperature (480 ºK) quasi-static and dynamically-loaded wrought aluminum alloy 7075 (AA7075) to capture the strain rate ...
• Development of neural network-based computer vision system for automated grading operation of a hydraulic excavator 

  Xu, Jiaqi (University of Alabama Libraries, 2018)

  Hydraulic excavators are widely used in the construction and mining industries. While conventional hydraulic excavators have been manually operated by a human operator, automated systems are being developed as an effective ...
• Flame diagnostics of swirl stabilized combustion without and with porous inert media for passive mitigation of thermoacoustic instabilities 

  Allen, James (University of Alabama Libraries, 2018)

  Implementing the combustion strategy of lean premixed (LPM), gas turbines can significantly reduce regulated emissions from the combustion process but are susceptible to thermoacoustic instabilities. With the use of ...
• Experimental investigation of detonation wave speed fluctuations in a rotating detonation combustor 

  Welch, Cooper Haddad (University of Alabama Libraries, 2018)

  Rotating Detonation Combustion (RDC) has been under investigation recently for its thermodynamic efficiency advantage over traditional constant pressure gas turbine combustors. The main challenge in integrating RDCs with ...
• Effect of pre-existing damage on structural integrity of honeycomb core sandwich panels 

  King, William (University of Alabama Libraries, 2018)

  This work presents an experimental and numerical investigation of the effects of pre-existing core damage on aluminum honeycomb core composite sandwich structures. Quasi static flexural and compression experiments were ...
• Numerical Modelling of the Magnus Force and the Aerodynamic Torque on a Spinning Sphere in Transitional Flow 

  Volkov, Alexey N. (2007)

  Three dimensional transitional flow over a spinning sphere is studied numerically by the direct simulation Monte Carlo method. The flow is assumed to be steady-state, gas molecules interact with each other as hard spheres ...
• 3D Numerical Modelling of a Rarefied Gas Flow in the Nearby Atmosphere around a Rotating Cometary Nucleus 

  Volkov, Alexey N.; Lukyanov, German A. (2007)

  A combined 3D model of a nearby atmosphere around an arbitrary rotating spherical cometary nucleus is developed. The model includes a 3D unsteady model of solar radiation absorption and heating of the nucleus material ...
• Kinetic Model of a Collisional Admixture in Dusty Gas and its Application to Calculating Flow Past Bodies 

  Volkov, Alexey N.; Tsirkunov, Yury M. (2000)

  Using the methods of statistical physics, the basic kinetic equation describing the dynamics of a polydisperse admixture of solid particles in a dilute dusty-gas flow is derived. Particle rotation, inelastic collisions, ...
• Fluid/Kinetic Hybrid Simulation of Atmospheric Escape: Pluto 

  Tucker, Orenthal J.; Erwin, Justin T.; Johnson, Robert E.; Volkov, Alexey N.; Cassidy, Timothy A. (2011)

  A hybrid fluid/molecular kinetic model was developed to describe the escape of molecules from the gravitational well of a planet's atmosphere. This model was applied to a one dimensional, radial description of molecular ...

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