Theses and Dissertations
Investigation and development of oil-injection nozzles for high-cycle fatigue rotor spin test
(Monterey, California. Naval Postgraduate School, 2005-03)
Resonant excitation tests of rotor blades in vacuum spin pits using discrete oil jets showed that impact erosion of the blades could limit test times, but lower excitation amplitudes were produced using mist nozzles. ...
Thermo-mechanical response of monolithic and NiTi shape memory alloy fiber reinforced Sn-3.8Ag-0.7Cu solder
(Monterey, California. Naval Postgraduate School, 2005-09)
In electronic packaging, the reliability of solders is a critical issue, since serve as both electrical and mechanical connections. The most common failures arise from the thermo-mechanical fatigue (TMF) of solders, due ...
Stability analysis of a towed body for shipboard unmanned surface vehicle recovery
(Monterey California. Naval Postgraduate School, 2005-03)
As the U.S. Navy develops new technologies which enhance automation and reduce crew size onboard naval vessels, unmanned vehicles will become increasingly valuable in conducting maritime operations. Effective launch and ...
Fluid-structure interaction effects resulting from hull appendage coupling
(Monterey California. Naval Postgraduate School, 2005-09)
In previous work conducted in the modeling and simulation of ships subjected to underwater explosions, there has been some debate over the influence that hull appendages have upon the dynamic response of a multi-degree-of-freedom ...
Analysis of the failure of a vacuum spin-pit drive turbine spindle shaft
(Monterey California. Naval Postgraduate School, 2005-09)
The Naval Postgraduate School's Rotor Spin Research Facility experienced a failure in the Spring of 2005 in which the rotor dropped from the drive turbine and caused extensive damage. A failure analysis of the drive turbine ...
Friction stir processing of nickel aluminum propeller bronze in comparison to fusion welds
(Monterey, California. Naval Postgraduate School, 2005-06)
Friction Stir Processing (FSP) is currently being considered for use in manufacture of the Navy's NiAl bronze propellers. Incorporating this technology may improve service performance and enable reduction of manufacturing ...
Impact of leading-edge orientation and shape on performance of a compressor blade
(Monterey, California. Naval Postgraduate School, 2005-06)
This thesis presents a Computation Fluid Dynamics (CFD) analysis of the aerodynamic performance of circular and elliptical leading edges of compressor blades, with a range of leading-edge droop angles. Specifically, ...
Contour tracking control for the REMUS autonomous underwater vehicle
(Monterey California. Naval Postgraduate School, 2005-06)
In the interest of enhancing the capabilities of autonomous underwater vehicles US Naval Operations, controlling vehicle position to follow depth contours presents exciting potential for navigation. Use of a contour ...
Flow field surveys in a transonic compressor prior to inlet steam ingestion tests
(Monterey, California. Naval Postgraduate School, 2005-09)
Investigating the effect of steam ingestion into an aircraft jet engine is necessary to improve understanding of stall and surge in transonic axial compressors. Specifically, to understand the "pop stall" phenomenon ...
Experimental and computational investigation of flow in a transonic compressor inlet
(Monterey, California. Naval Postgraduate School, 2005-09)
As part of an initial baseline survey of the inlet flow-field into a transonic compressor rotor, a five-hole probe was calibrated and used to determine the Mach number and inlet pitch angle distributions. The data for Mach ...
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