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Theses and Dissertations (Mechanical and Aeronautical Engineering): Recent submissions
Now showing items 121-140 of 380
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(University of Pretoria, 2015)This document focuses on the procedure and results of creating a thermohydraulic model of the secondary cooling system of the SAFARI-1 research reactor at the Pelindaba facility of the South African Nuclear Energy Corporation ...
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(University of Pretoria, 2017)The aim of this study is to design, implement and investigate the use of a Magneto-Rheological (MR) equipped Hydro-Pneumatic suspension system to solve the ride versus handling compromise of off-road vehicles. This suspension ...
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(University of Pretoria, 2017)This dissertation presents research and experimental work done to characterize the core and winding vibrations of power transformers with regulator windings by measuring the tank vibrations. The experimental tests were ...
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(University of Pretoria, 2017)To improve ride comfort a reduction in the acceleration experienced by occupants is required. Simulation software and test equipment are able to measure reductions in acceleration that are too small for humans to perceive. ...
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(University of Pretoria, 2015)This study is focused on modifying an existing solenoid valve based semi-active hydropneumatic spring-damper system using Magneto-Rheological (MR) fluid. The MR fluid's effective viscosity can be altered by application of ...
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An investigation on inefficiencies in spare part management processes in South African Power Plants (University of Pretoria, 2018)Inefficiencies in spare parts management can, and do, have great repercussions for the execution of maintenance in Eskom power stations. Despite this, the sub-processes of spare parts management in power stations had not ...
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(University of Pretoria, 2017)Walking is the most common form of human locomotion and the systematic study thereof is known as gait analysis. Measurement and assessment thereof have application in many fields including clinical diagnosis, rehabilitation ...
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(University of Pretoria, 2017)Solar collector absorber tubes play a critical role in converting incident solar heat flux into absorbed thermal energy and transferring it to a heat transfer fluid. In this study a single horizontally orientated absorber ...
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(University of Pretoria, 2017)The laminar and turbulent flow regimes have been extensively investigated from as early as 1883, and research has been devoted to the transitional flow regime since the 1990s. However, there are several gaps in the mixed ...
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(University of Pretoria, 2017-11)Blade Tip Timing (BTT) has been in existence for many decades as an attractive vibration based condition monitoring technique for turbomachine blades. The technique is non-intrusive and online monitoring is possible. For ...
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(University of Pretoria, 2017)The mining sector in South Africa accounted for 14.3% of all electricity supplied by Eskom in 2016. Up to 25% of this energy was consumed by mine cooling systems, suggesting that more focus should be placed on the energy ...
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(University of Pretoria, 2017)Secondary flow structures account for nearly 50% of aerodynamic losses experienced in the turbine blade passages. The adverse effects of these vortex structures transport the hot mainstream fluid towards the endwall blade ...
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(University of Pretoria, 2017)Heavy haul railway operations permit the transport of huge volumes at lower cost than other modes of transport. The low cost can only be sustained if the maintenance costs associated with such railway operations are ...
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(University of Pretoria, 2017)The main objective of this work is to establish an analytical model to evaluate the rate of corrosion in a horizontal pipe downstream of an orifice under flow-accelerated corrosion (FAC). FAC is a serious issue in nuclear ...
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(University of Pretoria, 2017)A wing-body-tail (WBT) configuration has been proposed without the conventional tailplane, allowing for new design objectives for the aerodynamic shape of the fuselage. A shorter, low-drag body (LDB) can be employed with ...
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(University of Pretoria, 2017)The demand for alternative power sources has increased rapidly over the past few years as the cost of electricity is rapidly increasing in South Africa. Biogas can be generated from biomass in an anaerobic digestion process ...
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(University of Pretoria, 2017)Modern nuclear reactors still use Zirconium-4 Alloy (Zircaloy®) as the cladding material for fuel elements. A substantial amount of research has been done to investigate the boiling heat transfer behind the cooling mechanism ...
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(University of Pretoria, 2017)In the industrial design of heat exchangers, engineers have long followed the general rule of avoiding transitional flow, and have rather designed a system operating in the turbulent flow regime. Whilst the turbulent regime ...
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(University of Pretoria, 2017)Antiresonance vibration isolation has long been a well known, studied and applied method for alleviating vibrations in stiff structures where small static deflection and a low transmissibility is needed, making it ideal ...
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(University of Pretoria, 2017)Read abstract in the document attached
Now showing items 121-140 of 380