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.
Results
Showing 1 to 20 of 108 for “"Secondary Flow"”.
-
Electrohydrodynamic Secondary Flow
Made available in DSpace on 2015-05-12T21:43:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6915365.PDF: 17343384 bytes, checksum: d54b8d43ba0b40c091be52e796088c9c (MD5) Previous issue date: 1969
-
Secondary flow in axial compressors
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1954.
-
The secondary flow in rectangular ducts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1957.
-
Secondary flow heat transfer phenomena in branch piping
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
-
A secondary flow approach to the inlet vortex flow field
… with the vortex is investigated using a secondary flow approach. In this approach the flow is assumed to be composed of an irrotational primary flow and a weak shear flow, with the vortex filaments associated with the latter being regarded as convected by the former. The potential flow …
-
Improving the performance of aerofoil sections using momentum transfer via a secondary flow
Aerodynamic flow control can improve aerofoil performance by influencing the natural growth of boundary layers, which develop on the surface of vehicles moving in viscous fluids. Many active and passive techniques have been developed to reduce drag and/or increase the lift of aerofoil …
-
Detection of secondary flow in a turbine cascade using a tracer gas technique
This thesis presents an investigation into the motions of the horseshoe vortices and the passage vortex, within a plane turbine blade cascade. Fluid motion was determined using a tracer gas technique. Ethylene was injected into the pressure-side and suction-side legs of the horseshoe vortex, near …
-
Reduction of Secondary Flow Losses in a Turbine for Use in Man-Portable Power Generation
… is on the turbine components and how the secondary flow losses from the generated airfoil shapes can be reduced to improve component performance. One of the secondary flow loss items to be addressed is the generation of the Horseshoe Vortex. The Horseshoe Vortex is an aerodynamic …
-
Secondary flow, total pressure loss and the effect of circumferential distortions in axial turbine cascades
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
-
Fully developed turbulent flow in straight rectangular ducts : secondary flow, its cause and effect on the primary flow
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
-
Investigation of the Effects of an Upstream Cavity on the Secondary Flow in Transonic Turbine Blade Passages with Endwall Contouring
… here aims to contribute to the understanding of secondary flows in modern high-pressure (HP) turbine blade passages. More specifically, it aims to improve the understanding of vortical structures near the endwall with respect to the presence of an upstream cavity that approximates the gap present …
-
Liquid metal brushes for homopolar devices
… require a thorough knowledge of liquid metal flows in a narrow gap between a fixed surface and a moving surface, with a strong applied magnetic field and with a free surface beyond each moving end of the gap. The radial and axial velocities in the secondary flow are reduced by a strong axial …
-
The influence of channel-skewed bedforms on flow structure in a high-amplitude meandering channel
The interaction of flow, sediment transport, and substrate morphology (morphodynamics) leads to complex boundary configurations of ripples, dunes, and bars along alluvial rivers. The instantaneous boundary morphology heavily influences the local flow structure, especially within meander bends, and …
-
Effects of Tip Clearance and Surface Roughness on Small-Scale Turbopump Impeller Performance
… turbopump impellers by assessing the dominant flow features, quantifying the underlying loss mechanisms, and determining the sensitivity of performance losses to changes in tip clearance and surface roughness. The study identifies the primary flow features governing impeller performance to be …
-
Experimental and numerical modeling of submarine channel flow and morphodynamics
… are recognized as products of density-driven flows known as turbidity currents. The flow field and the morphodynamics of these channels, however, remain poorly understood due to dormancy of these systems during the present geologic time. Both laboratory and numerical modeling allow the study …
-
Aerodynamics of Endwall Contouring with Discrete Holes and an Upstream Purge Slot Under Transonic Conditions with and without Blowing
… to improve aerodynamic performance by reducing secondary flow strength. The effects of endwall contouring with discrete holes and an upstream purge slot for a high turning (127") airfoil passage under transonic conditions are investigated. The total pressure loss and secondary flow field were …
-
Effect of width-to-depth ratio on the mean flow velocities for a Kinoshita meander bend
… a Kinoshita meander bend. The characteristics of flow in such a bend have been studied by Ancalle (2007) and Abad and Garcia (2009a) for width-to-depth ratios equal to 2.4 and 4.0. The present study extends that work and includes a higher width-to-depth ratio (equal to 12.0) in addition to those …
-
Non-Intrusive Sensing and Feedback Control of Serpentine Inlet Flow Distortion
… intensity found in serpentine inlet airflow was established using wall-pressure fluctuation measurements. This sensing technique was experimentally developed for aircraft with serpentine inlets in a symmetric, level flight condition. The turbulence carried by the secondary flow field …
-
Flow Field Computations of Combustor-Turbine Interactions in a Gas Turbine Engine
… between the combustor and turbine. The flow field at a combustor exit shows non-uniformities in pressure, temperature, and velocity in the pitch and radial directions. This inlet profile to the turbine can have a considerable effect on the development of the secondary flows through the …
-
Endwall Heat Transfer and Shear Stress for a Nozzle Guide Vane with Fillets and a Leakage Interface
… combustor is compounded by a complex vortical secondary flow at the junction of the endwall and the airfoil. This flow tends to increase local heat transfer rates and sweep coolant away from component surfaces, as well as decrease the turbine aerodynamic efficiency. Past research has shown that …
Page 1 of 6