Theses and Dissertations
Stall analysis in a transonic compressor stage and rotor
(Monterey, California. Naval Postgraduate School, 2009-06)
Gas turbine engine design is based on simplifying assumptions, including axi-symmetric flow. These assumptions break down in the real machines especially when operating near to stall. The reduction in operating surge ...
Loss measurements in the endwall region of a cascade of compressor blades at stall
(Monterey California. Naval Postgraduate School, 2006-06)
Flow around second-generation controlled-diffusion blades in cascade at stall was investigated using fivehole probe surveys. Wake pressure surveys were conducted at various locations between the cascade centerline and ...
Experimental investigation of high-pressure steam induced stall of a transonic rotor
(Monterey, California. Naval Postgraduate School, 2007-06)
Steam leakage from the catapult system of U.S. Navy aircraft carriers can stall the compressors of modern jet aircraft if ingested during takeoff. This phenomenon, known as "pop stall", is of particular concern to the U.S. ...
Experimental investigation and numerical prediction of the performance of a cross-flow fan
(Monterey California. Naval Postgraduate School, 2006-12)
The concept of a fan-wing aircraft configuration for the purpose of vertical takeoff and landing has drawn much attention. Recently, more investigations revealed that a cross-flow fan (CFF) was capable of providing the ...
Flow field survey in a transonic compressor rig
(Monterey California. Naval Postgraduate School, 2006-06)
As the Navy prepares to transition to F-35C Joint Strike Fighter the need to understand "pop stalls-- caused by steam leakage in catapult systems is of concern. â Pop stalls* caused by steam ingestion through the aircraft ...
Computational fluid dynamic model of steam ingestion into a transonic compressor
(Monterey, California. Naval Postgraduate School, 2009-06)
The U.S. Navy's concern with steam-induced jet engine stall has become more pertinent with the introduction of the F-35C. During take offs on aircraft carriers, steam from aging catapult systems can potentially seep onto ...
Experimental and numerical analysis of a crossflow fan
(Monterey, California. Naval Postgraduate School, 2003-12)
An auto vehicle that can take off and land vertically is envisioned to solve current and future problems of road congestion by utilizing the enormous air space above us. Crossflow Fan has been looked into in the past to ...
Performance comparison between rough and smooth-cast blades in a low-speed multistage compressor
(Monterey, California. Naval Postgraduate School, 2006-06)
A performance comparison between smooth-cast and rough-cast blades was conducted in a lowspeed multistage compressor. The purpose was to show that rough-cast blades can be used for initial performance tests of low-speed ...
Examination of flow around second-generation controlled diffusion compressor blades in cascade at stall
(Monterey California. Naval Postgraduate School, 2004-06)
The flow around second-generation controlled-diffusion blades in cascade at stall was examined experimentally through the use of a two-component laser-Doppler velocimeter. Blade surface pressure measurements were also ...
Improved aerothermodynamic measurements of the T63-A-700 gas turbine engine
(Monterey, California. Naval Postgraduate School, 2005-09)
This thesis contains an analysis of the failure of the instrumentation ring for measuring the combustor exit temperature and total pressure in the T63-A-700 gas turbine engine. An improved ring design has been constructed ...
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Hobson, Garth V. (17)
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Mechanical Engineering (17)