Browsing by Subject "Engineering, Aerospace"
Now showing items 1-7 of 7
-
A Nonlinear Harmonic Balance Solver for an Implicit CFD Code: OVERFLOW 2
(2009)A National Aeronautics and Space Administration computational fluid dynamics code, OVERFLOW 2, was modified to utilize a harmonic balance solution method. This modification allows for the direct calculation of the nonlinear ... -
Coupled-Mode Flutter for Advanced Turbofans
(2010)In the vast majority of measured turbomachinery blade flutter occurrences, the response occurs predominately in a single mode. The primary reason for this single-mode flutter is that for turbomachinery applications ... -
Development of an Efficient Design Method for Non-synchronous Vibrations
(2008-04-24)This research presents a detailed study of non-synchronous vibration (NSV) and the development of an efficient design method for NSV. NSV occurs as a result of the complex interaction of an aerodynamic instability with blade ... -
Flutter and Forced Response of Turbomachinery with Frequency Mistuning and Aerodynamic Asymmetry
(2008-04-25)This dissertation provides numerical studies to improve bladed disk assembly design for preventing blade high cycle fatigue failures. The analyses are divided into two major subjects. For the first subject presented in Chapter ... -
Nonlinear Aeroelastic Analysis of Flexible High Aspect Ratio Wings Including Correlation with Experiment
(2009)A series of aeroelastic analyses is performed for a flexible high-aspect-ratio wing representative of a high altitude long endurance (HALE) aircraft. Such aircraft are susceptible to dynamic instabilities such as flutter, ... -
Optimization of the Aerodynamics of Small-scale Flapping Aircraft in Hover
(2008-06-27)Flapping flight is one of the most widespread mean of transportation. It is a complex unsteady aerodynamic problem that has been studied extensively in the past century. Nevertheless, by its complex nature, flapping flight ... -
Techniques to Assess Acoustic-Structure Interaction in Liquid Rocket Engines
(2008-04-25)Acoustoelasticity is the study of the dynamic interaction between elastic structures and acoustic enclosures. In this dissertation, acoustoelasticity is considered in the context of liquid rocket engine design. The techniques ...
