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Now showing items 31-40 of 116
The measurement of axial turbine tip clearance flow phenomena in a moving wall annular cascade and in a linear cascade.
(2011-01-05)
On unshrouded axial flow turbine rotors, the tip clearance, required for thermal expansion and manufacturing limitations, allows fluid to leak from the pressure side to the suction side of the blade. This flow across the ...
Thermal shock and thermal stress prediction on a highly loaded turbine nozzle guide vane based on an aerodynamic and thermal analysis.
(2005)
A 2-D plain strain CFD/FEM model to simulate thermal shocks and stresses in a turbine blade has been set up using the commercially available software FLUENT and NASTRAN. The model was validated against the experimental ...
The development of a catchment scale irrigation systems model for sugarcane.
(2005)
The implementation of the National Water Act (1998) requires significant changes in the institutional arrangements for water management and, to cater for human and environmental needs, as well as addressing historical ...
Experimental and numerical study of heat transfer on turbine blades.
(2011-01-20)
An experimental and numerical study of he aerodynamics and the associated heat transfer on turbine blades, has been carried out as part of the ongoing Armscor Denel aircraft engine maintenance program. The experimental ...
Analysis of residual stresses and distortions resulting from multi-pass welding of nozzles to cylindrical pressure vessels.
(2012)
The purpose of the present study is to obtain insight into the formation, behaviour and magnitude of welding-induced residual stresses and distortions resulting from welding nozzles onto cylindrical pressure vessels. A ...
Life prediction of power line damper.
(2013-06-20)
Power line function is to transfer electrical power. Power lines represent a major component in the transport process of electricity and they are subjected to various types of failures. Causes of failure include wind-induced ...
The prediction of cavitation in high speed centrifugal pumps.
(2014)
The primary focus of this research was to analyse the flow through a high speed centrifugal turbopump and validate the original meanline design. This research forms part of a larger project which is to develop a kerosene ...
The design and analysis of a kerosene turbopump for a South African commercial launch vehicle.
(2014-09-12)
South Africa is one of the few developing countries able to design and build satellites; however it is reliant on other nations to launch them. This research addresses one of the main technological barriers currently ...
Open architecture control system for a modular reconfigurable machine tool.
(2014-09-12)
The present day manufacturing environment has forced manufacturing systems to be flexible and
adaptable to be able to match the product demands and frequent introduction of new products and
technologies. This research ...
Simulation and experimental evaluation of a hybrid flat-plate vacuum insulated photovoltaic and thermal power module.
(2015-11-20)
Current Photovoltaic (PV) technologies are characterised by low conversion efficiencies due to the inability to fully absorb solar radiation within the spectral range. This results in the generation of residual heat and ...