Browsing by Department "Aerospace Engineering"
Now showing items 81-100 of 153
Experimental and Computational Investigation of a Turbofan Inlet Duct
(2009-11-20)
The flow field of an axisymmetric turbofan inlet was investigated experimentally and computationally. Flow visualization results were obtained using LIF, hydrogen bubbles, and PIV. Incidence angle was determined to be a ...
An Experimental Investigation into the Wildland Fire Burning Characteristics of Loblolly Pine Straw
(2021-07-19)
Wildland fires present a threat to both the environment and to homes and businesses in the wildland urban interface. Understanding the behavior of wildland fires is crucial for developing informed risk management techniques, ...
An Experimental Investigation of Confined Cyclonic Flows and Ensuing Jet
(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 ...
An Experimental Investigation of Roll and Yaw Coupled Oscillations of a Delta Wing
(2011-05-03)
An experimental investigation was undertaken to study roll and yaw coupled oscillation of a delta wing. Results indicated that the oscillations started at a mean α = 29 for all cases. Beyond which the amplitude of oscillations ...
An Experimental Study of the Propagation of Equivalence Ratio Oscillations on their Effect on Combustion Instabilities
(2019-04-23)
Lean premixed combustors have become a promising method in gas turbine engines to operate more efficiently and within the regulatory standards for emissions. However, this lean premixed operation is susceptible to combustion ...
Explicit Non-Linear Finite Element Analysis with Fluid Structure Coupling of a High Velocity Impact
(2011-05-03)
A computational investigation was undertaken to study the pressure wave generated from a high velocity, multi-material penetrator impacting a compartmented cylindrical container. Variations of the penetrator material ...
A Feedback Linearization Approach for Panel Flutter Suppression with Piezolectric Actuation
(2008-12-15)
A panel is subject to dynamic instability when induced aerodynamic loads under the
supersonic/hypersonic environment result in a self-excited oscillation called panel flutter. The panel of an aircraft that flies at ...
Flow Around Axisymmetric and Two-dimensional Forward-Facing Cavities
(2006-05-15)
Flowfield of axisymmetric and two-dimensional forward facing cavities was investigated. Flow visualization results obtained using PLIF and hydrogen bubbles were used to develop a generic flow topology consisting of a ...
Generalized Galerkin Approach for the Study of Nonlinear Thermoacoustic Instabilities
(2020-08-10)
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 ...
Identification of a Tethered Satellite Using an Extended Kalman Filter
(2007-12-15)
Recent studies involving a tethered satellite system(s) (TSS) have increased due to the importance of accurately identifying and analyzing the motion of a TSS. If the motion of a tethered satellite is not accurately ...
Infinitely Many Optimal Iso-Impulse Trajectories in Two-Body Dynamics
(2023-07-27)
Rendezvous maneuvers are designed to match the position and velocity vectors of a target body (e.g., planet, comet, satellite) whereas transfer maneuvers are designed to match the orbital elements of the target body, except ...
Influence of pulsatility and inlet velocity profiles on tracheal airflow characteristics
(2022-07-20)
Patient-specific simulation is a powerful and emerging tool for studying human airway physiological and pathological characteristics. Decision-based systems for clinicians based on the patient airflow characteristics play ...
Initial Relative-Orbit Determination Using Second-Order Dynamics and Line-of-Sight Measurements
(2015-05-06)
This thesis addresses the problem of determining the initial relative-orbit state between a chief and a deputy satellite using line-of-sight unit vectors. An analytical solution is investigated for estimating the deputy ...
Integration of Grid Fins for the Optimal Design of Missile Systems
(2014-05-02)
Grid fins are unconventional missile control and stabilization devices that produce unique aerodynamic characteristics that are vastly different from that of the conventional planar fin. History has shown that grid fins ...
Investigation and Mitigation of Vortex Induced Vibration Using a Cyber Physical System
(2023-08-04)
The Cyber Physical Aeromechanic System (CPAS) is a test bed for fluid-structure interaction studies. The CPAS is a 2nd-order state space system and tests three dynamic
systems: a pendulum, vortex-induced vibration (VIV) ...
Investigation of Active Control of Aircraft Wing Tip Vortices and Wake Turbulence
(2011-08-17)
The present work was focused on study and application of active flow control methods to
alleviate the wake turbulence problem in commercial aircraft. Sinusoidal perturbations were
introduced into the tip vortex generated ...
Investigation of Aeroacoustic Effects of Trailing-Edge Modifications to Blades of a Coaxial Counter-rotating Rotor
(2020-11-17)
Noise generated by the rotor blades of modern UAVs pose significant limitations to the widespread adoption of UAVs in the future. To mitigate noise production, rotor blades with a serrated trailing-edge have been used to ...
Investigation of Plasma Detachment from a Magnetic Nozzle
(2007-08-15)
The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) electric space propulsion concept currently under development by the Ad Astra Rocket Company utilizes a magnetic field to confine a propellant plasma. The energetic ...
Investigation of the Characteristics of an Axisymmetric Jet Subjected to Azimuthal Forcing
(2013-05-15)
Characteristics of an axisymmetric jet subjected to azimuthal forcing were investigated. A circular variable diameter iris was positioned near the nozzle exit to impart azimuthal excitation to the jet at desired Strouhal ...
Launch Vehicle Performance Enhancement Using Aerodynamic Assist
(2008-08-15)
A complete preliminary design model of a three-stage solid-fuel launch vehicle
has been combined with a genetic algorithm to perform an optimization study with the
goal to enhance performance using aerodynamic assist. ...