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Theses and Dissertations (Mechanical and Aeronautical Engineering): Recent submissions
Now showing items 41-60 of 380
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(University of Pretoria, 2019)Even though infants are frequent vehicle travellers, little is known about the effect of vibrations on their comfort and health. Some studies have characterised the vibrational response of infant car seats, while others ...
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(University of Pretoria, 2019)The majority of condition monitoring techniques employed today consider the acquisitioning and analysis of structural responses as a means of profiling machine condition and performing fault detection. Modern research ...
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(University of Pretoria, 2020)Falling film evaporators that operate in the nucleate boiling regime in the refrigeration industry offer a number of advantages over their flooded counterparts such as lower refrigerant charge and at times improved heat ...
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Investigation of wind patterns on Marion Island using Computational Fluid Dynamics and measured data (University of Pretoria, 2021)There have been countless research investigations taking place on Marion Island (MI), both ecological and geological, which have reached conclusions that must necessarily neglect the impacts of wind on the systems under ...
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(University of Pretoria, 2020)Vibration-based condition monitoring is a key and crucial element for asset longevity and to avoid unexpected financial compromise. Currently, data-driven methodologies often require significant investments into data ...
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(University of Pretoria, 2020)Industrial operational environments are stochastic and can have complex system dynamics which introduce multiple levels of uncertainty. This uncertainty leads to sub-optimal decision making and resource allocation. ...
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(University of Pretoria, 2020)Flow boiling of Perfluorohexane (FC-72) in rectangular microchannels with one-sided uniform heating was studied experimentally at different rotations (θ). Various rotational orientations were investigated ranging from θ = ...
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(University of Pretoria, 2021-02)Response reconstruction is used to obtain accurate replication of vehicle structural responses of field recorded measurements in a laboratory environment, a crucial step in the process of Accelerated Destructive Testing ...
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(University of Pretoria, 1997)Damage in structures may be identified and quantified by using measured frequency response functions (FRFs) or identified modal properties as a basis for updating. The main shortcoming of these methods is that if they ...
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(University of Pretoria, 2021)Multiphase flow provides a solution to the high heat flux and precision required by modern-day gadgets and heat transfer devices as phase change processes make high heat transfer rates achievable at moderate temperature ...
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(University of Pretoria, 2021)The reliable operation of planetary gearboxes is critical for the sustained operation of many machines such as wind turbines and helicopter transmissions. Hybrid methods that make use of the respective advantages of ...
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(University of Pretoria, 2020)Concentrated solar power is a growing but expensive alternative energy resource. One of the most common issues faced when it comes to solar dish design is the complex trade-off between cost and optical quality. A novel ...
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(University of Pretoria, 2020-10)The complex interface between tyre and terrain is a largely studied topic in terramechanics and vehicle dynamics research. This interface, known as the contact patch, is however hidden from view and cannot easily be measured. ...
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(University of Pretoria, 2020)The growing demand for energy worldwide requires attention to the design and operating of heat exchangers and thermal devices to utilise and save thermal energy. There is a need to find new heat transport fluids with ...
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(University of Pretoria, 2019)Laminar and transitional flow regimes in tubes have been extensively investigated in the literature. However, there are several gaps in the forced and mixed convection literature, especially for inclined tubes with ...
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Failure assessment of boiler tubes under localized external erosion to support maintenance decisions (University of Pretoria, 2019)Boiler tubes used in power plants and manufacturing industries are susceptible to numerous failures due to the harsh environment in which they operate, usually involving high temperature, pressure and erosive-corrosive ...
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(University of Pretoria, 2019)Please read abstract in the thesis.
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(University of Pretoria, 2020-08-26)Tyres behave similar to a spring and damper systems smoothing out road irregularities as the tyre rolls. Tyre stiffness and damping characteristics are largely influenced by the tyre pressure. As a result, tyre pressure ...
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(University of Pretoria, 2019)Risk Based Inspection (RBI) is a risk assessment and management tool that addresses an area not completely addressed in other organisational risk management efforts such as Process Hazards Analyses (PHA) or Reliability-Centred ...
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(University of Pretoria, 2020)The combination of brittle material with ductile fibres can produce competent composites. The fibres transmit tensile forces across cracks that form in the brittle matrix at relatively low tensile strains. The fibre ...
Now showing items 41-60 of 380