This Is AuburnElectronic Theses and Dissertations

Browsing Auburn Theses and Dissertations by Department "Aerospace Engineering"

Now showing items 21-40 of 130

Civil UAV Type Certification: DoD Mishap Analysis 2000-2009 and FAA Certification Roadmap 

Hundley, Joshua (2012-08-29)
The Federal Aviation Administration (FAA) has issued memorandums which support the use of flight activities which can demonstrate that proposed operation can be conducted at an acceptable level of safety. This paper ...

Close-Proximity Flight Validation Analysis with FlightStream 

Owens, Taylor (2019-08-08)
The objective of this research is to validate the use of FlightStream® in accurately predicting aerodynamic loads in a scenario of close-proximity flight, such as an aerial refueling and formation flight environment. The ...

Collaborative UAS Control to Increase Deconfliction Ability in the NAS 

Reitz, Brian (2009-07-15)
The progression of aviation has led to the strong desire to integrate unmanned aerial systems (UASs) into the national airspace system (NAS). In order for UASs to occupy the NAS concurrently with other aircraft, the ...

A Comparison of Artificial Viscosity Sensors for the Discontinuous Galerkin Method 

Favors, Joshua (2013-08-20)
The following work focuses on the development of an explicit Runge-Kutta, discontinuous Galerkin finite element method for the nonlinear, hyperbolic Euler equations. The discontinuous Galerkin method is a control-volume ...

A Comparison of Particle Tracking and Sizing Using Plenoptic Imaging and Digital In-line Holography 

Munz, Elise (2016-04-22)
Digital in-line holography and plenoptic photography are two techniques for single-shot, volumetric measurement of 3D particle fields. A preliminary comparison of the two methods is presented by applying plenoptic imaging ...

Computational Characterization of Drag Reduction for Platooning Heavy Vehicles 

Watts, Andrew (2015-05-06)
This thesis uses Computational Fluid Dynamics to analyze the aerodynamic properties of multiple heavy vehicle groups in leader-follower configurations, referred to as platoons. The primary metric of interest is the resistive ...

A Computational Fluid Dynamics Analysis of a Driver-Assistive Truck Platooning System with Lateral Offset 

Humphreys, Hugh (2017-04-17)
This study utilizes Computational Fluid Dynamics to analyze the aerodynamic drag performance of a two-truck Driver-Assistive Truck Platooning system. Simulations were conducted to characterize the drag reduction versus ...

A Computational Fluid Dynamics Analysis of Shock Wave-Boundary Layer Interactions 

Hu, Jiayue (2018-07-20)
With the continuous development of Computational Fluid Dynamics (CFD), many different numerical methods and turbulence models have been modified to enhance the capability of prediction of complex turbulence flow. This study ...

Computational Fluid Dynamics Simulation Of Chemically Reacting Gas Flows Through Microfibrous Materials 

Duggirala, Ravi (2008-05-15)
This dissertation presents results of research efforts to propose a design space for new microfibrous materials with enhanced chemical reactivity with optimum pressure gradient. These microfibrous materials material are ...

Computational Vorticoacoustic Stability Analysis of the Bidirectional Vortex Engine 

Kovacic, Paul (2016-05-04)
Since the invention of combustion-based propulsion systems, the presence of resonating, broadband waves has often been associated with the onset of a phenomenon known as "combustion instability." These waves commonly take ...

Conceptual Design Optimization of an Augmented Stability Aircraft Incorporating Dynamic Response Performance Constraints 

Welstead, Jason (2014-12-10)
This research focused on incorporating stability and control into a multidisciplinary design optimization on a Boeing 737-class advanced concept called the D8.2b. A new method of evaluating the aircraft handling performance ...

Control System Development for Autonomous Aerobatic Maneuvering with a Fixed-Wing Aircraft 

Reitz, Brian (2014-12-04)
The increasing popularity of unmanned aircraft today has led to the development of more sophisticated vehicles with greater operating capabilities. The multirole nature of many civil and military unmanned aircraft along ...

Control Volume Analysis of Rectangular Ducts with Arbitrary Mean-Flow, Transverse Wall Impedances, and Temperature Discontinuity 

Morehead, Connor (2020-04-20)
Combustion instabilities (CIs) are a consistent and ubiquitous problem for industrial burners, rockets, and gas turbines. Reduced order acoustic models are often used to analyze combustion instabilities. Typically, reduced ...

Design and Construction of a Mach 2 Wind Tunnel For Cavity Acoustics Research 

Davis, Brian (2013-04-17)
Cavity flow is encountered in many practical applications of ground and air vehicles operating at high speed. Examples include airflow past open windows, sunroofs, and wheel-wells of automobiles as well as landing gear and ...

Design and Testing of a Gas Distribution Method for Pulsed Inductive Thrusters 

Miller, Robert (2008-12-15)
A gas distribution manifold for use in a Pulsed Inductive Thruster has been designed and tested. The Argon test gas is distributed radially outward over a flat disc from an enclosed manifold area. The manifold was designed ...

Design of a Guidance Controller Using Network Topology 

Robertson, Clay (2016-08-05)
In dynamic environments, the control of a formation of unmanned vehicles remains a significant control problem on both network and guidance dynamics levels. Currently, formations of unmanned vehicles require multiple ground ...

Design Optimization of Space Launch Vehicles Using a Genetic Algorithm 

Bayley, Douglas (2007-08-15)
The United States Air Force (USAF) continues to have a need for assured access to space. In addition to flexible and responsive spacelift, a reduction in the cost per launch of space launch vehicles is also desirable. ...

Design Tool Development for Liquid Propellant Missile Systems 

Riddle, David (2007-05-15)
The use of computer programs driven by genetic algorithms (GA’s) has become an increasingly popular method of optimizing engineering designs. This thesis focuses on the modeling and optimization of liquid rocket engine ...

Detached Eddy Simulations of a Simplified Tractor-Trailer Geometry 

Ghuge, Harshavardhan (2007-05-15)
This thesis presents a comparison of the results from the Detached Eddy Simulation (DES) turbulence model used for modeling flow over a {1/8}$^{th}$ scale simplified model of a tractor-trailer geometry (or the Ground ...

Determination of Key Parameters for Reverse Engineering Solid Rocket Powered Missiles 

Metts, Jonathan (2006-12-15)
This thesis examines the process of reverse engineering solid rocket powered missiles using legacy codes and a genetic algorithm (GA). Available data for reverse engineering problems might include performance characteristics ...