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Theses and Dissertations (Mechanical and Aeronautical Engineering): Recent submissions
Now showing items 281-300 of 380
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(University of Pretoria, 2010-09-20)The main aim of this research project is to extend theories of four-wheel-steering as developed by J. Ackermann to include an individually steered four-wheel steering system for passenger vehicles. Ackermann’s theories, ...
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(University of Pretoria, 2006-09-20)Please read the abstract (Summary) in the 00front part of this document
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(University of Pretoria, 2008-09-22)A handling quality investigation was performed on the swept gull-wing configuration. The swept gull-wing configuration is tailless and has a wing with a transition in the sweep and dihedral angle. An example of this type ...
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(University of Pretoria, 2010-09-17)The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using mathematical optimisation. Further ...
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(University of Pretoria, 2009)This study quantifies whole-body vibration on a range of mine machinery typically used in a South African open cast mine. The ISO 2631-1 (1997) standard was used in the computation of weighted root mean square (WRMS) and ...
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Modelling heat and mass flow through packed pebble beds : a heterogeneous volume-averaged approach (University of Pretoria, 2008-09-09)This work details modelling buoyancy-driven viscous flow and heat transfer through heterogeneous saturated packed pebble beds via a set of volume-averaged conservation equations in which local thermal disequilibrium is ...
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(University of Pretoria, 2008-09-05)Conventional rotating machine vibration monitoring techniques are based on the assumption that changes in the measured structural response are caused by deterioration in the condition of the rotating machine. However, due ...
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(University of Pretoria, 2007-09-04)Condition monitoring of epicyclic gearboxes through vibration signature analysis, with particular focus on time domain methods and the use of adaptive filtering techniques for the purpose of signal enhancement, is the ...
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(University of Pretoria, 2007-09-10)Tippler structures operate under arduous conditions for most of their operational lives. During routine structural inspections large fatigue cracks were discovered on some of the main structural components of a Tippler ...
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(University of Pretoria, 2008-09-19)Developments regarding internal cooling techniques have allowed the operation of modern gas turbine engines at turbine inlet temperatures which exceed the metallurgical capability of the turbine blade. This has allowed the ...
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(University of Pretoria, 2008-09-10)The aim of this study is to apply computed order tracking with subsequent rotation domain averaging and statistical analysis to typical mining environments. Computed order tracking is a fault detection method that is ...
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(University of Pretoria, 2010-08-25)In this study, experimental data was collected in order to create a test case that can be used to validate computational fluid dynamics (CFD) simulations and the individual models used therein for gas turbine combustor ...
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(University of Pretoria, 2010-08-25)Industrial tray air-dryers are increasingly used for the drying of agricultural products. The main drawback of these dryers is the non-uniform velocity distribution in the drying zone resulting in a non-uniform drying of ...
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(University of Pretoria, 2010-08-24)Vibration monitoring is widely used to determine the condition of various mechanical systems. Traditionally a transducer is attached to the structure under investigation and the vibration signal recorded. This signal is ...
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(University of Pretoria, 2007-08-20)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2008-08-05)The efficient optimisation of vehicle suspension systems is of increasing interest for vehicle manufacturers. The main aim of this thesis is to develop a methodology for efficiently optimising an off-road vehicle’s suspension ...
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(University of Pretoria, 2006-07-28)An existing analytical model, in use by Spoornet for the past two decades for calculating rail stresses on railway track, was revisited and improved. The model provided engineers with an easy-to-use program for evaluating ...
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(University of Pretoria, 2006-07-28)Over the years, different lubricants have been used to operate hip simulators. The current applicable ISO standard (ISO 14242-1:2002) recommends the use of 25% calf serum diluted with deionised water. The standard further ...
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(University of Pretoria, 2006-07-28)A need for a cost effective, versatile and easy to use suspension component testing method has arisen, following the development of a four-state hydro-pneumatic semi-active spring-damper system. A method known as ...
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(University of Pretoria, 2005)The modern gas turbine engine industry needs a simpler and faster method to facilitate the design of gas turbine combustors due to the enormous costs of experimental test rigging and detailed computational fluid dynamics ...
Now showing items 281-300 of 380