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Theses and Dissertations (Mechanical and Aeronautical Engineering): Recent submissions
Now showing items 201-220 of 380
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(University of Pretoria, 2015)Nanofluids are modern heat transfer fluids which can significantly increase the thermal performance of a thermal system. It enhances the thermal conductivity of working fluids due to adding solid nanoparticles to the ...
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(University of Pretoria, 2015)Parabolic trough systems are one of the most commercially and technically developed technologies for concentrated solar power. With the current research and development efforts, the cost of electricity from these systems ...
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(University of Pretoria, 2014)This study focused on a numerical second law analysis and optimisation of a receiver tube op- erating in a parabolic trough solar collector for small-scale application. The receiver functioned in a Rankine cycle. The ...
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(University of Pretoria, 2015)Sport Utility Vehicles are designed to be used on both smooth roads and rough off-road terrains. These vastly different operating conditions require vehicle and suspension parameters that lie at opposite ends of the design ...
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Magneto-rheological (MR) Damper design for off-road vehicle suspensions with flow blocking ability (University of Pretoria, 2015)This study presents the design, development and testing of a magneto-rheological (MR) damper for an off-road vehicle. The MR damper developed in this study is expected to enhance the capability of the suspension system ...
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(University of Pretoria, 2015)The small-scale dish-mounted open solar thermal Brayton cycle (1-20 kW) with recuperator has an advantage in terms of cost and mobility and can offer an off-grid electricity solution to the people of the water-scarce ...
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(University of Pretoria, 2015)Except for aerodynamics forces, all vehicle excitation forces are generated at the tyre-road interface. Considering low speed applications, such as terramechanics where the aerodynamics force are negligible, the road-tyre ...
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(University of Pretoria, 2014)A market for a low-cost vibration protection device in the rotating machine industry has been identified that satisfies the needs of small firms unable to afford and sustain a condition monitoring operation. In this ...
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(University of Pretoria, 2014)Most tyre models developed to date require a fair amount of data before an accurate representation of the tyre can be obtained. This study entails the development of a simplified, yet accurate, non-linear Finite Element ...
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(University of Pretoria, 2015)In order to simulate vehicle handling and roll over propensities, tyre characteristics in the form of side-force versus slip-angle curves, as well as suitable tyre models are required. For large tyres these characteristics ...
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Heat Transfer and Pressure Drop of Developing Flow in Smooth Tubes in the Transitional Flow Regime (University of Pretoria, 2015)Heat exchangers have a wide range of applications and engineers need accurate correlations to optimise the design of these heat exchangers. During the design process, the best compromise between high heat transfer ...
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(University of Pretoria, 2015)This dissertation forms part of a research project assigned to the University of Pretoria by Eskom (the primary electricity utility in South Africa). The project aims to address, amongst others, the limitations imposed by ...
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(University of Pretoria, 1993)To assist in the development of mechanical structures which are subjected to dynamic loads, structural dynamic testing, using a test rig loaded by servo-hydraulic actuators to reproduce operational measured responses ...
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Road surface profile monitoring based on vehicle response and artificial neural network simulation (University of Pretoria, 2015)Road damage identification is still largely based on visual inspection methods and profilometer data. Visual inspection methods heavily rely on expert knowledge which is often very subjective. They also result in traffic ...
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(University of Pretoria, 2015)A ground vehicle is a dynamic system containing many non-linear components, ranging from the non-linear engine response to the tyre-road interface. In pursuit of developing driver-assist systems for accident avoidance, as ...
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(University of Pretoria, 2015)In this dissertation, entropy generation minimisation techniques are used to numerically investigate the minimum entropy generation due to heat transfer and fluid friction in a number of different heat exchangers. Twenty-seven ...
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Rotating machine diagnosis using smart feature selection under non-stationary operating conditions (University of Pretoria, 2015)This dissertation investigates the effectiveness of a two stage fault identification methodology for rotating machines operating under non-stationary conditions with the use of a single vibration transducer. The proposed ...
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(University of Pretoria, 2015)The favourable physical and mechanical properties of silicon carbide (SiC) nanopowders allow application across many areas, including high-power, high-frequency electronics and high-temperature technologies. Many different ...
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(University of Pretoria, 2014)The performance of optimization algorithms is sensitive to both the optimization problem's numerical characteristics and the termination criteria of the algorithm. Given these considerations two tuning algorithms named ...
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(University of Pretoria, 2014)This project mainly focused on the implementation of the second law of thermodynamics relating to the design of heat-exchanging components in an open-air solar thermal Brayton cycle. These components include one or more ...
Now showing items 201-220 of 380