Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"test rigs"”.
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Assessment of the Wear Effects of Alumina-Nanofluids on Heat-Exchanger Materials
… presents research to establish methodologies for testing and evaluating surface-change by nanofluid impact. The work is presented on development of novel test rigs and testing methodologies, and on the use of typical surface analysis tools for assessment of wear and erosion that may be produced by …
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Transitional and turbulent flow of non-Newtonian slurries in pipes
… turbulent flow regime has been large scale-pipe-tests. This thesis addresses this design problem, with particular emphasis on the theoretical modelling of the laminar/turbulent transition and turbulent flow behaviour of these slurries in pipes. The literature and theory pertinent to-the flow of …
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Evaluation of kickback energies in abrasive chain saws and cut-off saws: a theoretical and experimental study
… physics models, numerical integrations, and two test rigs were designed to study them. First the different mechanisms which could cause kickback were considered (kickback modes) and simple physics models were made to describe them. From these, it was found that a pinch based kickback was …
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Design of Networked Control Systems and Global Web-based Control Laboratory
… is based in the University of Glamorgan but its test rigs are diversely located in four Institutions from both the UK and China. In order to manage these test rigs from different places, a four layer structure (Central Server/Regional Server/Sub-Server/Test Rig) is adopted. The four layers are …
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The analysis of vibration signals during induction motor starting transients with a view to early fault detection.
… where it is either impractical or undesirable to test a machine under loaded conditions. Certain machines, as a result of their operational environment, or perhaps because they have been moved to a workshop for repair cannot be tested under loaded conditions. This project describes the monitoring …
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Aspects of magnetisation and iron loss characteristics in switched-reluctance and permanent-magnet machines
… been carried out using both static and dynamic test methods. The test data has been compared with simulation results from analytical design programs and finite element models. The effects of mutual coupling on the magnetisation characteristics are investigated through measurement and simulation. …
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Accelerated Methods For Determining The Oil Deterioration In An Internal Combustion Engine
The purpose of this investigation is to consider, test and compare methods for extracting lubricating oil for subsequent chemical analysis from an operating internal combustion engine. Following on from the development of the tube base sampling system in the early 198O’s, the project initially …
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The monitoring of induction motor starting transients with a view to early fault detection.
… signals have been obtained from purpose built test rigs and these signals have been analysed in both the time and frequency domains. In order to assist with the comprehension of this data a sophisticated computer simulation of the induction motor during the starting period has also been …
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Well-Conditioned Heat Transfer Measurements on Engine Scale Gas Turbine Rigs
… quantification of turbine heat transfer on test rigs which closely represent gas-turbine engine configurations. Fundamental improvements are made to existing methods, in the definition of the ‘semi- infinite limit’ for transient measurement techniques, in Infra-red camera calibration, and in …
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Thermal Drilling and Anchoring on Icy Planetary Bodies
… of ice failure modes were established. Three test rigs, two end effectors, and over ten thermal picks were prototyped and tested. Testing with dry ice at atmospheric pressure and testing with cryogenic water ice in a vacuum chamber provided an understanding of thermal drilling in the …
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Effect of hole configurations on film cooling from cylindrical inclined holes for the application to gas turbine blades
… different geometries hole exit by using a single test transient IR thermography technique. The focus of this investigation is to investigate advanced cooling hole geometries on film cooling heat transfer and cooling effectiveness over flat and turbine airfoil surfaces. Four test designs, crescent …
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The erosion of pipe bends in pneumatic conveying systems
… particles. From appropriate analysis of the test data, a basis of correlation in terms of the respective parameters has been established, from which the likelihood of erosion can be predicted. In order to extend the potential range of variables involved in the mechanics of the erosion …
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Investigation of in-nozzle flow characteristics of fuel injectors of IC engines
… simulate quasi-steady flows in the steady state test rigs of fuel injectors of IC engines. The RANS approach is selected over computationally expensive SAS (Scale Adaptive Simulations), DES (Detached Eddy Simulations) and LES (Large Eddy Simulations) because it was considered that these …
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Thermal Modelling of the Ventilation and Cooling inside Axial Flux Permanent Magnet Generators
… measurements were carried out on two separate test rigs, which were a simplified single-sided axial flux machine test rig and a large-scale low speed axial flux machine. The experimental results were compared with the numerical results obtained from both the lumped parameter and CFD models. …
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The influence of slurry viscosity on hydrocyclone performance
… involved the design and operation of two test rigs incorporating three hydrocyclone sizes (75,100, 165 mm), with two different ore types (platreef ore, copper ore) from a secondary stage operation used as the feed material. A change in relative viscosity was investigated by altering the …
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Characterisation of Glass Fibre Polypropylene and GFPP based Fibre Metal Laminates at high strain rates
… High strain rate (5x10^2 to 10^3 /s) compression tests were conducted on GFPP using a compressive Split Hopkinson Pressure Bar (SHPB) and a Direct Impact Hopkinson Pressure Bar (DIHPB), in the through-thickness and in-plane directions. In both loading directions, the peak stress of GFPP increased …
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Effects of Aero-Propulsive Interactions for Various Wing Integration Techniques on Electric Ducted Fan Performance
… EDF itself. The study was formed by three major test rigs described in the methodology section. The first rig was designed to test EDFs in isolation at various angles of attack. In this test, various sizes of EDFs were tested with a common duct geometry; the sizes ranged from 51 cm2 fan-swept …
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Lead and Copper Contamination in Potable Water: Impacts of Redox Gradients, Water Age, Water Main Pipe Materials and Temperature
… contributing factor. In large-scale pipe rigs, total and dissolved lead release was 3-5 times higher during the summer compared to the winter. However, in bench scale studies, higher temperature could increase, decrease, or have no effect on lead release dependent on material and water …
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Metody pro návrh a testování náprav osobních vozidel
… přehled simulačních softwarů pro vývoj a testování podvozku ve virtuální fázi vývoje. Ty jsou děleny podle výpočetních principů, vyhodnocování výsledků a podle prostředí. Poslední část je věnována problematice spojené s testováním podvozků a jeho vlastností jako celku, testováním …