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Theses and Dissertations (Mechanical and Aeronautical Engineering): Recent submissions
Now showing items 161-180 of 380
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(University of Pretoria, 2016)Heat exchangers are used in industrial processes to recover heat between two processes fluids and are widely used. Although the equations for heat transfer and pressure drop characteristics in a double pipe heat exchangers ...
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(University of Pretoria, 2017)Natural convection as a heat transfer mechanism plays a major role in the functioning of many heat transfer devices, such as heat exchangers, energy storage, thermal management and solar collectors. All of these have a ...
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(University of Pretoria, 2016)In most previous studies that have been conducted on converting waste heat energy from exhaust gases into useful energy, the engine waste heat recovery system has been placed along the exhaust flow pipe where the temperature ...
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(University of Pretoria, 2016)The South African electricity mix is highly dependent on subcritical coal-fired power stations. The average thermal efficiency of these power plants is low. Traditional methods to increase the thermal efficiency of the ...
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(University of Pretoria, 2016)The thermophysical properties of nanofluids have attracted the attention of researchers to a far greater extent than the heat transfer characteristics of nanofluids have. Contradictory results on the thermal-fluid behaviour ...
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(University of Pretoria, 2016)This thesis was aimed developing a fundamental understanding of the boundary layer response to arbitrary motion. In this context arbitrary motion was defined as the unsteady translation and rotation of an object. Research ...
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(University of Pretoria, 2017)Some metals, such as Ti-6Al-4V, have a high elongation to failure when strained at certain rates and temperatures. Superplastic forming is the utilisation of this property, and it can be used to form thin, geometrically ...
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(University Of Pretoria, 2017)Thermal power stations operate at elevated temperatures and pressures in order to attain maximum available steam energy. At these high temperatures creep becomes a dominant mechanism that needs to be considered. However, ...
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(University of Pretoria, 2017)This dissertation serves to present the research conducted on sensor placement optimisation (SPO) using sensitivity analyses of virtual experiments in order to design virtual inverse problems. Two classes of SPO methods ...
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(University of Pretoria, 2016)Stabilised line of sight optical payloads for maritime vessels require variable platform conditions during the development, test and evaluation phases. A ship deck motion simulator is one means of generating such conditions ...
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(University of Pretoria, 2016)Ultrasonic Guided Waves can propagate over long distances, and are thus suitable for the interrogation of long structural members such as rails. A recently developed Ultrasonic Broken Rail Detection (UBRD) system for ...
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(University of Pretoria, 2016)As a consequence of their relative magnitude with respect to overall organisational expenditure, potential sources for significant cost savings involve maintenance costs, raw material costs and energy consumption. Previously ...
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(University of Pretoria, 2015)Nanofluids show great potential for conventional heat transfer fluids that could benefit industries and save huge costs. Nanofluids are well known for enormously enhancing the thermal conductivity of a base fluid. However, ...
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(University of Pretoria, 2016)A novel method for polyamide/clay bio-nanocomposites fabrication was developed in an attempt to facilitate ?extensive delamination? of clay stacks in polyamide matrices. The method, the so-called ?surfactant-free ...
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(University of Pretoria, 2016)Maintenance of equipment at the required condition to ensure a reliable performance, as well as improvement of safety, are major concerns in the field of asset integrity management. Condition monitoring is a procedure that ...
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(University of Pretoria, 2016)The Finite Element Method is a powerful tool that can be used to test, improve or better understand an industrially relevant problem. There are numerous Finite Element Analysis (FEA) software packages that operate either ...
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(University of Pretoria, 2016)Design optimization is a subject field where mathematical algorithms are used to improve designs. Analyses of designs using computational techniques often require significant computing resources, and for these problems, ...
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(University of Pretoria, 2015)Blades are critical components of turbomachines, failure of a single blade may result in catastrophic failure of the entire machine. One study found that blade failure was the third largest cause of power generation unit ...
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(University of Pretoria, 2015)There exists many investigations in the field of pressure drop inside smooth tubes; however, there is a research gap where this flow is in the transitional flow regime. All work in the transitional flow regime thus far has ...
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(University of Pretoria, 2016)Tyre modelling has been a focal point of vehicle dynamics modelling since the beginning of vehicle dynamics research. Many tyre models are based on single point contact models which utilize some form of the Pacejka Magic ...
Now showing items 161-180 of 380