School of Aerospace Engineering Theses and Dissertations
Original work in partial fulfillment of a graduate degree in the School of Aerospace Engineering
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Recent Submissions
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Multi-Fidelity Reduced-Order Modeling Applied to Fields with Inconsistent Representations
(Georgia Institute of Technology, 2020-12-06)Our ever-increasing capacity for high-performance computing has progressively elevated the role of physics-based simulations in the conceptual and preliminary phases of aircraft design. This virtualization of the early ... -
A Framework for Fan Stage Conceptual Design Under Distortion Induced by Boundary Layer Ingestion
(Georgia Institute of Technology, 2020-12-04)Various tightly integrated aircraft concepts have emerged as a result of aggressive performance goals set forth by various organizations. Most integrated aircraft system configurations exploit the concept of Boundary Layer ... -
Methods for Construction of Surrogates For Computationally Expensive High-Dimensional Problems
(Georgia Institute of Technology, 2020-11-19)Maturation of computational models has increased reliance on numerical simulations for the analysis, and more importantly, design of complex engineered systems. The high accuracy and realism offered by simulation-based ... -
A Refined Potential Theory for the Incompressible Unsteady Subcritical-Reynolds number Flows on Canonical Bluff Bodies
(Georgia Institute of Technology, 2020-11-19)The three main approaches to exploring fluid dynamics are actual experiments, numerical simulations, and theoretical solutions. In classical potential theory, the steady inviscid incompressible flow over a body can be ... -
Development and Evaluation of Terahertz Time-Domain Spectroscopy for Electric Propulsion Plasma Diagnostics
(Georgia Institute of Technology, 2020-11-19)Terahertz time-domain spectroscopy (THz-TDS) is a novel plasma diagnostic that has the potential to fill present gaps in electric propulsion (EP) plasma diagnostic capabilities. However, there remain unanswered questions ... -
A Methodology for Capturing the Aero-Propulsive Coupling Characteristics of Boundary Layer Ingesting Aircraft in Conceptual Design
(Georgia Institute of Technology, 2020-11-11)Economic and environmental benefits of fuel efficient aircraft have driven research towards unconventional configurations and technologies. Boundary Layer Ingesting (BLI) concepts appear to be a promising solution, relying ... -
Evaluating the Effects of Model Simplifications on the Transference of Policies Learned in Simulation
(Georgia Institute of Technology, 2020-10-08)Both the military and civil worlds are being transformed by the development and deployment of unmanned systems to a wider range of scenarios. As the field of unmanned systems has grown and matured, it has continuously ... -
Entrainment, Mixing, and Ignition in Single and Multiple Jets in a Supersonic Crossflow
(Georgia Institute of Technology, 2020-08-19)Jets in crossflow are a canonical example for three-dimensional turbulent mixing. Here, non-reacting and reacting sonic jets in a supersonic crossflow are studied. The influence of injectant properties on turbulent mixing ... -
LES of Turbulent Premixed Flame Kernel Formation and Development
(Georgia Institute of Technology, 2020-12-17)Spark ignition of flammable mixtures is highly sensitive to early and local conditions. Kernel formation and subsequent flame development are largely governed by turbulent conditions and interactions with igniter geometry. ... -
X-ray Pulsar Navigation Instrument Performance and Scale Analysis
(Georgia Institute of Technology, 2019-12-06)This thesis investigates instruments for autonomous satellite navigation using measurements of X-ray emissions from millisecond pulsars. A manifestation of an instrument for this purpose, called the Neutron star Interior ... -
Development of a Multidisciplinary Design Analysis Framework for Unmanned Electric Flying Wings
(Georgia Institute of Technology, 2019-12-03)Small-scale subsonic unmanned aerial vehicles have become common tools in both military and civil applications. A vehicle configuration of special interest is the flying wing (aka all-wing or tailless aircraft). This ... -
An acoustical based approach to conceptual design of non-traditional rotorcraft configurations
(Georgia Institute of Technology, 2020-07-31)As interstate and highway traffic increases, commute times become drastically large. Such large commute times create fatigue and take away from productive hours at work, or joyful hours at home. The idea of urban air ... -
A quaternion approach to the modal analysis and reduced-order modeling of three-dimensional fluid systems
(Georgia Institute of Technology, 2020-07-31)In 1967, Lumley derived the proper orthogonal decomposition (POD) in an attempt to provide a mathematical description of patterns that emerge in turbulent flow, which he called coherent structures. The POD method derived ... -
A framework for developing executable architecture for aerial intelligence surveillance and reconnaissance systems-of systems: A systems dynamics approach
(Georgia Institute of Technology, 2020-07-27)A framework for the development of holistic executable architecture for complex systems-of-systems as a method to analyze means and ways trades across the DOTmLP-P (Doctrine, Organization, Training, materiel, Leadership, ... -
A systems of systems methodology for conceptual studies of in-situ resource utilization for near earth object applications
(Georgia Institute of Technology, 2020-07-28)Near Earth Objects (NEO) have historically been neglected as an object of study relative to other celestial bodies. Interest has been increasing as more recognize the potential value of NEO resources represented by ‘asteroid ... -
Adjoint based design optimization of systems with time dependent physics and probabilistically modeled uncertainties
(Georgia Institute of Technology, 2020-07-28)For aerospace structures, failure can occur not only because of static adversities like divergence, but also due to time dependent issues like flutter and large vibrations. Therefore, the consideration of time-domain physics ... -
Improved techniques for aerodynamic flow control simulation with fluidic oscillators
(Georgia Institute of Technology, 2020-05-17)High-fidelity simulations were performed to characterize the physics of jet interaction fluidic oscillators and provide a basis for the development of improved boundary conditions that obviate the need to model the interior ... -
Risk analysis framework for unmanned systems
(Georgia Institute of Technology, 2020-05-17)Airspace regulatory agencies are currently focusing on risk assessment frameworks for integrating the operation of Unmanned Aerial Systems (UAS) into National Air Space (NAS). Multiple frameworks, such as the Specific ... -
Structural impacts of inflatable aerodynamic decelerator design
(Georgia Institute of Technology, 2020-05-17)In order to land larger payloads to Mars, more capable decelerators are required to advance beyond the performance limitations of traditional heritage entry, descent, and landing technologies. One potential technology is ... -
An architecture-based growth approach for industrial gas turbine product development
(Georgia Institute of Technology, 2019-07-30)In this research, an architecture-based methodology has been developed to understand and interpret the ascending performance trajectory of industrial gas turbines from a growth perspective. Historical data depicting the ...
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