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 1193 for “"inlet"”.
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Inlet Recirculation in Radial Compressors
… dominant feature of these flow conditions is inlet recirculation. It causes a large portion of flow to be expelled through the rotor inlet, creating a blockage ring on the casing. While on the one hand, inlet recirculation is the main loss-source at low-speed and low-flow within centrifugal …
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Hydrodynamic controls on multiple tidal inlet persistence
The importance of the persistence of multiple inlets in coastal systems is fundamental for issues such as water quality, navigability, and beach/barrier stability. In long embayments, having extended residence times, the stability of multiple inlets can be important for more efficient flushing and …
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Active control rotating stall with inlet distortion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Hydrodynamic controls on multiple tidal inlet persistence
Thesis (Ph.D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, and the Woods Hole Oceanographic Institution), 2001.
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Turbine inlet non-uniformities and unsteady mechanisms
The effect of axial turbine stage inlet non-uniformities are examined through two model problems: wake attenuation and hot streak processing. In the first, twodimensional calculations (RANS and URANS) are used to identify the mechanisms contributing to upstream stator wake attenuation through a …
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Inlet drag prediction for aircraft conceptual design
… the development of methods for predicting inlet drag. Originally, the drag of only one inlet type, the variable-geometry conical inlet, could be calculated within ACSYNT. This prompted the present research which resulted in the creation of a modular suite of subroutines that extend the …
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Fan noise reduction from a supersonic inlet
… the radiation of fan noise through a supersonic inlet. A scaled-down model of an axisymmetric, mixed-compression, supersonic inlet (P-inlet) was used in conjunction with a 10.4 cm (4.1 in) diameter turbofan engine simulator as the noise source. The tests were conducted at an outdoor facility …
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Aeroacoustics of the bifurcated 2D supersonic inlet
… performance of the bifurcated 2D supersonic inlet during takeoff and approach flight conditions, and to compare these results indirectly to those of the axisymmetric supersonic inlet. The comparison is not direct since the centerbody position of the bifurcated 2D inlet is set at takeoff and …
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Body Force Modeling for Engine Inlet Fan System
… conditions, especially for circumferential inlet distortions. The unique feature of this body force model compared to conventional throughflow methods is that it requires no information about the fan blade geometry. Instead, fan performance data is fed into the body force model, and the …
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Flow analysis and control in a subsonic inlet
S-duct inlets are commonly used on subsonic cruise missiles, as they offer a good compromise between compactness, low observability and aerodynamic performance. Though currently used S-ducts exhibit good performance in terms of distortion and pressure recovery at the AIP, the situation can degrade …
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Flow visualization study of the inlet vortex phenomenon
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1981.
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Preliminary experiment and analysis of supersonic inlet buzz
The inlet buzz phenomenon was investigated experimentally and analytically. An external-compression axisymmetric inlet model, having 74 mm in cowl lip diameter, was tested in the 229x229 sq mm blowdown wind tunnel at Mach 2.4. The test facility has shown potential for the supersonic inlet research. …
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Reduced fan noise radiation from a supersonic inlet
… and acoustic performance of a supersonic inlet with a modified auxiliary door geometry. A 1/14 scale model of an axisymmetric, mixed-compression, supersonic inlet designed for civil transportation was used in conjunction with a 10.4cm (4.1 in.) turbofan engine simulator to test a new inlet …
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Influence of inlet temperature distortion on turbine heat transfer
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Boundary layer ingesting inlet design for a silent aircraft
… offsets lower than 11%. Curvature ahead of the inlet should be avoided as well as bifurcations inside the duct. Inlet performance with an evolved version of the airframe decreased, mainly due to a thicker boundary layer. Although further tailoring of the geometry is needed, the above guidelines …
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Investigation on the inlet design of the regenerative pump
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1957.
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UNSTEADY PRESSURE MEASUREMENTS IN A SUPERSONIC INLET DURING UNSTART SIMULATIONS
Unsteady pressure behavior during inlet unstart is a critical factor in understanding the performance and stability of supersonic systems. This thesis will investigate the unsteady pressure measurements within a supersonic inlet during unstart. By using a model developed by Ben Nikaido, Kulites …
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Enhanced compressor distortion tolerance using asymmetric inlet guide vane stagger
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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"Sump-Inlet" deployment linkage design for sargassum ocean sequestration (SOS)
… renders the sargassum negatively buoyant. One inlet device, discussed in Gray's thesis, is called the "sump-inlet" which operates much like an oil skimmer, controlling and enforcing a high solids concentration by locating a weir close to the free surface of the water. Once sargassum and …
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