Theses and Dissertations
Effect of shroud geometry on the effectiveness of a short mixing stack gas eductor model.
(Monterey, California. Naval Postgraduate School, 1983-06)
An existing apparatus for testing models of gas eductor
systems using high temperature primary flow was modified to
provide improved control and performance over a wide range of
gas temperature and flow rates. Secondary ...
Filmwise condensation of steam on low integral-finned tubes
(1984-09); NPS-69-84-008
Filmwise condensation heat-transfer measurements if steam were made on horizontal tubes under vacuum and near-atmospheric pressures. Data were taken for a smooth tube and for 21 tubes which contained rectangularly-shaped, ...
Three dimensional pursuit guidance and control of submersible vehicles
(Monterey, California. Naval Postgraduate School, 1991-09)
A pure pursuit guidance law is combined with a heading autopilot to provide accurate path keeping of submersible vehicles. The scheme is implemented and analyzed in both the horizontal and vertical planes. A complete ...
Nonlinear analysis of coupled roll/sway/yaw stability characteristics of submersible vehicles
(Monterey, California. Naval Postgraduate School, 1997-03)
The problem of coupled roll, sway, and yaw stability analysis of submersible vehicles is analyzed, with particular emphasis on nonlinear studies. Previous results had indicated that a primary loss of stability is through ...
Phase transformations in Ti3Al based alloy
(Monterey, California. Naval Postgraduate School, 1991-12)
A 'super a2' Ti3Al based alloy with additions of niobium, chromium and tantalum was studied with respect to phase transformation under different heat treatment and aging times and temperatures. As received samples were ...
Performance and flow regimes in plane 2-D diffusers with exit channels at low Reynolds numbers
(Monterey, California. Naval Postgraduate School, 2003-09)
A numerical study on laminar incompressible flows in 2-D straight walled diffusers in the low Reynolds number regime (105-1048) is presented to investigate performance and various flow regimes that might exist. Tail channels ...
The effect of condensate inundation on steam condensation heat transfer to wire-wrapped tubing
(Monterey, California. Naval Postgraduate School, 1983-06)
Steam condensation heat transfer measurements were made
in a 5-tube test condenser having an additional perforated
tube to simulate up to 30 active tubes. Results were
obtained for smooth tubes and roped tubes wrapped ...
Stability analysis of ship steering in canals
(Monterey, California. Naval Postgraduate School, 1997-03)
The problem of ship steering in canals and confined waters is analyzed with emphasis on stability and bifurcation analysis. The classical maneuvering equations of motion augmented with a model for ship/canal interaction ...
A nonlinear study of open loop dynamic stability of submersible vehicles in the dive plane
(Monterey, California. Naval Postgraduate School, 1994-03)
This thesis presents a comprehensive nonlinear study of straight line stability of motion of submersibles in the dive plane under open loop conditions. A systematic perturbation analysis demonstrates that the effects of ...
Stability criteria analysis for Landing Craft Utility
(Monterey, California: Naval Postgraduate School, 2017-12)
Currently used Landing Craft Utility (LCU) stability criteria may not be optimal for the typical coastal transits of those vessels. Therefore, this study examines the intact transverse static and dynamic stability of the ...
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Lieutenant, Hellenic Navy (13)
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Mechanical Engineering (13)