Browsing Auburn Theses and Dissertations by Author "Majdalani, Joseph"

Now showing items 1-10 of 10

Characterization of High Speed and Arbitrary Headwall Injection Effects on the Trkalian Swirling Mean Flowfield in Rocket Motors

Cecil, Orie (2016-07-28)

In this work, the bulk gaseous motion inside cylindrical chambers driven by wall normal injection with and without reactive headwalls is explored. The base model is of the Trkalian type and is here extended to include ...

Characterization of Swirl-Driven Hybrid Rocket Engines

Marquardt, Timothy (2020-11-03) ETD File Embargoed

Although hybrid rockets offer several potential benefits in terms of safety and performance, their use has mostly been limited to lab-scale motors and academic settings. Foremost among the factors contributing to this ...

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 ...

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 ...

Determination of the Image Distance in a Plenoptic Camera

Thomason, Chelsea (2014-12-09)

Two methods for determining the distance between the lens of a plenoptic camera and the focal plane, known as the image distance, are presented and tested. The plenoptic camera is a form of light field imaging, which seeks ...

Dynamics of Secondary Steady State Flows in a Combined Taylor-Couette and Escudier Vortex Breakdown Flow Field

Waldheim, Jordan (2022-05-10)

Effects of a varying height end-wall on the bifurcation and stability of secondary steady state flows within the annular gap of a Taylor-Couette cell were investigated. Experiments were conducted at four different end-wall ...

An Experimental Investigation of Confined Cyclonic Flows and Ensuing Jet

Khan, Omer (2021-05-03)

Confined cyclonic flows are being explored for their application in propulsion due to several advantages rendered by confined vortices which include, increased fuel residence time, turbulence, and propellant mixing, resulting ...

Generalized Galerkin Approach for the Study of Nonlinear Thermoacoustic Instabilities

Cecil, Orie (2020-08-10) ETD File Embargoed

A Galerkin expansion approach to the study of nonlinear thermoacoustic instabilities is presented within a finite element framework. The foundation of the approach lies with weighted residual and spectral methods that ...

A Method For Obtaining New Conservation Quantities and a Solution Method For the N-Body Collision

Holmes, Eric (2019-08-15)

Exact, numerical, and perturbative methods are commonly used to solve dynamical systems of equations. Many systems’ solutions cannot be written in terms of elementary functions thus numerical and perturbative solutions ...

Numerical Investigation of the Flow Topology in a Bidirectional Vortex Engine

Sharma, Gaurav (2023-03-30) ETD File Embargoed

The characterization of swirl-driven phenomena, including cyclonic flows, continues to receive attention in the propulsion community. This may be attributed to the beneficial properties of swirl when integrated into ...