Scholarly Works, Department of Aerospace and Ocean Engineering
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Research articles, presentations, and other scholarship
Recent Submissions
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Daily Variability in the Terrestrial UV Airglow
(MDPI, 2020-09-30)New capability for observing conditions in the upper atmosphere comes with the implementation of global ultraviolet (UV) imaging from geosynchronous orbit. Observed by the NASA GOLD mission, the emissions of atomic oxygen ... -
Search and rescue at sea aided by hidden flow structures
(Springer Nature, 2020-05-26)Every year, hundreds of people die at sea because of vessel and airplane accidents. A key challenge in reducing the number of these fatalities is to make Search and Rescue (SAR) algorithms more efficient. Here, we address ... -
On Using Composability Tools for Reliability Analysis of Unmanned Multi-Aircraft Systems: A Case Study
(2020-01-15)This paper presents a case study that demonstrates how tools from compositional verification can be used to design and analyze complex multi-agent systems operating in dynamic and uncertain environments. The case study ... -
Sensitivity study for ICON tidal analysis
(2020-05-22)Abstract Retrieval of the properties of the middle and upper atmosphere can be performed using several different interferometric and photometric methods. The emission-shape and Doppler shift of both atomic and molecular ... -
Effect of transverse beam size on the wakefields and driver beam dynamics in plasma wakefield acceleration schemes
(2020-02-01)In this paper, wakefields driven by a relativistic electron beam in a cold homogeneous plasma are studied using 2D fluid simulation techniques. It has been shown that in the limit when the transverse size of a rigid beam ... -
Dynamic Analysis and Design Optimization of a Drag-Based Vibratory Swimmer
(MDPI, 2020-03-22)Many organisms achieve locomotion via reciprocal motions. This paper presents the dynamic analysis and design optimization of a vibratory swimmer with asymmetric drag forces and fluid added mass. The swimmer consists of a ... -
Wind Profiling in the Lower Atmosphere from Wind-Induced Perturbations to Multirotor UAS
(MDPI, 2020-02-29)We present a model-based approach to estimate the vertical profile of horizontal wind velocity components using motion perturbations of a multirotor unmanned aircraft system (UAS) in both hovering and steady ascending ... -
Pollution Transport Patterns Obtained Through Generalized Lagrangian Coherent Structures
(MDPI, 2020-02-06)Identifying atmospheric transport pathways is important to understand the effects of pollutants on weather, climate, and human health. The atmospheric wind field is variable in space and time and contains complex patterns ... -
A History of Fort Caswell, North Carolina
(Baptist Student Union, North Carolina State University, 1965)A brief history of Fort Caswell, near Southport, North Carolina, at the mouth of the Cape Fear River. -
The Global-Scale Observations of the Limb and Disk (GOLD) Mission
(2017-10)The Earth's thermosphere and ionosphere constitute a dynamic system that varies daily in response to energy inputs from above and from below. This system can exhibit a significant response within an hour to changes in those ... -
Application of the Spectral Element Method in a Surface Ship Far-Field UNDEX Problem
(Hindawi, 2019-07-25)The prediction of surface ship response to a far-field underwater explosion (UNDEX) requires the simulation of shock wave propagation in the fluid, cavitation, fluid-structure interaction, and structural response. Effective ... -
Hybrid RANS/LES Turbulence Model Applied to a Transitional Unsteady Boundary Layer on Wind Turbine Airfoil
(MDPI, 2019-07-11)A hybrid Reynolds-averaged Navier Stokes/large-eddy simulation (RANS/LES) turbulence model integrated with a transition formulation is developed and tested on a surrogate model problem through a joint experimental and ... -
Intercomparison of Small Unmanned Aircraft System (sUAS) Measurements for Atmospheric Science during the LAPSE-RATE Campaign
(MDPI, 2019-05-10)Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of the development and application of these systems, improving knowledge of best practices for accurate measurement ... -
Laser Displacement Sensors for Wind Tunnel Model Position Measurements
(MDPI, 2018-11-22)Wind tunnel measurements of two-dimensional wing sections, or airfoils, are the building block of aerodynamic predictions for many aerodynamic applications. In these experiments, the forces and pitching moment on the airfoil ... -
Prediction of Dynamic Stability Using Mapped Chebyshev Pseudospectral Method
(Hindawi, 2018-08-01)A mapped Chebyshev pseudospectral method is extended to solve three-dimensional unsteady flow problems. As the classical Chebyshev spectral approach can lead to numerical instabilities due to ill conditioning of the spectral ... -
Influence of Propulsion Type on the Stratified Near Wake of an Axisymmetric Self-Propelled Body
(MDPI, 2018-05-01)To better understand the influence of swirl on the thermally-stratified near wake of a self-propelled axisymmetric vehicle, three propulsor schemes were considered: a single propeller, contra-rotating propellers (CRP), and ... -
Helicopter Rotor Flow Analysis Using Mapped Chebyshev Pseudospectral Method and Overset Mesh Topology
(Hindawi, 2018-05-15)Unsteady helicopter rotor flows are solved by a Chebyshev pseudospectral method with overset mesh topology which employs Chebyshev polynomials for solution approximation and a Chebyshev collocation operator to represent ... -
Mathematical Framework for Hydromechanical Time-Domain Simulation of Wave Energy Converters
(Hindawi, 2018-01-17)Efficient design of wave energy converters based on floating body motion heavily depends on the capacity of the designer to accurately predict the device’s dynamics, which ultimately leads to the power extraction. We present ... -
Recent Remote Sensing Innovations and Future Direction
(2017-10-25) -
Final Report: Second Forum on Space Structures
(Virginia Tech, 1984-06)This document consists of summaries of presentations and discussions from the Forum, which was a meeting for investigators of structural dynamics and control issues in large space structures technology held 11-13 June 1984. ...
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