Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 593 for “"compressor"”.
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Unsteady compressor distortion response and compressor instability
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Rotary compressor model for investigating compressor performance and reliability
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Axial compressor stall.
… experimental investigation of rotating stall in compressors of high hub-tip ratio. Measurements were obtained in builds of one to four stages, covering a wide range of design flow rates and also a change in design reaction. The purpose of the experimental work has been to gain a better …
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Compressor leading edges
Compressor blades often have a small 'spike' in the surface pressure distribution at the leading edge. This may result from blade erosion, manufacture defects or compromises made in the original design process. In this thesis it is shown that these spikes will increase the loss generated by a blade …
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Miniature HCCI Engine Compressor
… A prototype miniature free-piston engine compressor runs for up to 30 s. New pistons and cylinder liners with coatings did not improve reliability when implemented in the engine. The engine stalled because pressure could not be held in the cylinder due to blow-by leakage caused by too …
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Axial compressor stability enhancement
… at all times. One source of instability is compressor stall. Stall problems can be reduced by machining cavities into the compressor casing adjacent to the rotor blades. This ‘casing treatment’ is the focus of the present work. Two treatment configurations are tested: circumferential grooves …
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High Speed Compressor Design
Abstract: High Speed Compressor Design A long-standing paradox exists in high speed compressor blade design. As the inlet flow to a row of blades approaches the speed of sound, the two-dimensional (2D) design of that blade row becomes exceptionally difficult, with designers laboriously trying to …
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Axial compressor reversed flow performance
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1985.
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Modular Multi-Stage Axial Compressor Design
… components, such as multi-stage axial compressors. It is the objective of this approach to utilize a "core" module in all the compressors, thus maximizing commonality and minimizing all relevant development, design, manufacture, procurement, and service costs; these reductions in cost …
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OPTIMIZATION OF A PIEZOELECTRIC ACOUSTICAL COMPRESSOR
A one-dimensional, axisymmetric, linear finite element model describing a fluid interacting with a piezoelectric actuator is developed. This system is used to generate finite amplitude standing waves in an acoustic cavity with rigid walls. The model includes the effects of viscous and thermal …
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The Design of Aspirated Compressor Bleed
Compressor bleed refers to the removal of flow from part way through the compressor for use in turbine cooling and other operational applications. Typical bleed systems in Industrial Gas Turbines comprise of an annular slot in the compressor casing, leading to external cavities. Aspiration refers …
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Three-dimensional Mechanisms in Compressor Flows
Three-dimensional design is central to all modern compressor design systems, but many of these methods still rely on a two-dimensional and sectional view of aerodynamics at their core. In this thesis it is argued that this view fundamentally limits design by not considering the effect, on …
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Active control of centrifugal-compressor surge
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Modelling high speed multistage compressor stability
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Probabilistic aerothermal design of compressor airfoils
… known in detail about its impact on aerothermal compressor performance. In this work, statistical and probabilistic techniques were used to assess the impact of geometric and operating condition uncertainty on axial compressor performance. High-fidelity models of geometric variability were …
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Flow losses in supersonic compressor cascades
… mechanisms that affect the flow in supersonic compressor cascades have been reviewed, including the changes in shock geometry that will occur with back pressure for both started and unstarted operation. Compressible fluid mechanics has been applied to the known shock geometry to obtain a …
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Vibration Analysis of a Fan/Compressor Blade
… of this thesis is the vibration analysis of compressor/fan blade using three-dimensional finite element analysis together with various analytical approaches. First, the analytical solutions were established using various analytical methods, Bernoulli-Euler, Rayleigh, Rayleigh-Ritz, …
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Robust design methodologies: application to compressor blades
Compressor blades are subtle aerodynamic shapes designed after years of research and insight. They inevitably show deviations from their desired shapes due to manufacturing errors, erosion or foreign object damage. In the present study we focus on seeking compressor blade geometries, that are …
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