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 20 of 20 for “"0913 Mechanical Engineering"”.
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Improving the design of travelling wave type sloshing absorbers
Liquid sloshing absorbers are simple structures consisting of a partially full container of liquid with a free surface. The primary objective of this thesis is to investigate the potential to improve the design of rectangular sloshing absorbers through attaching surface roughness elements …
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Flow fields and heat transfer of liquid falling film on horizontal cylinders
A liquid film flowing over horizontal cylinders is of great importance as a high rate of heat transfer exists between the falling liquid film and the horizontal cylinders. The objective of this research is to use numerical predictions, following experimental verification, to study the flow field …
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Design of effective traveling wave sloshing absorbers for structural control
… the hen’s egg possesses the properties of high mechanical damping. The possible employment of the hen’s egg as a sloshing absorber is investigated. Great potential is seen in this naturally occurring geometry.
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A heat transfer model applicable to the refuelling process for natural gas vehicles
This research presents a study of transient heat transfer phenomena taking place between a storage cylinder and the incoming gas during the cylinder charging process. A theoretical model of convective heat transfer between the gas and the cylinder is described. Experiments with the high pressure …
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Liquid sloshing in containers : its utilisation and control
… the interaction between liquid sloshing and a mechanical oscillator has been exploited to control resonant vibrations of the oscillator. A deep-liquid-level sloshing absorber is presented as a practical alternative to the damped tuned absorber. In addition, a numerical simulation procedure is …
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A computer controlled random wave generator
Simulation of ocean wave processes and model studies related to marine technology are areas of increasing economic and environmental importance. Sophisticated laboratory facilities are needed to model ocean wave phenomena under controlled conditions. This thesis describes the techniques and …
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Evaluation of the performance of corrugated shipping containers : virgin versus recycled boards
The compression strength and creep responses of corrugated fibreboard boxes after exposure to high and cyclic relative humidity conditions were studied and compared between boxes made from virgin and recycled liners and mediums which had the same ring crush values. The effect of moisture absorption …
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Development and testing of a variable valve timing system (VVT) for a twincam automotive engine
Variable valve timing (VVT) is an innovative design that enhances automotive engine performance and is important in addressing fuel consumption and emission output concerns. The purpose of the research reported here was to examine the concept of a VVT system because it had the promise of …
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Numerical model for analysis and control of the quality of bulk-stored grain using cold air
Food grains that have been cooled can be stored for prolonged periods. This is because the rate population increase of insect pests can be slowed, seed viability is maintained, dry matter loss is reduced and the persistence of chemical pesticides can be improved. This thesis reports the development …
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Modelling the microclimate in a conical bottomed circular grain silo
A three-dimensional mathematical model for predicting the behaviour of microclimate in the stored grain silo is presented. This analysis is implemented by calculating the air pressure field within an aerated conical bottomed circular silo, to continuing prediction the velocity field. The obtaining …
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A numerical study of convective heat transfer in stored respiring agricultural produce
A mathematical model of natural convection in three-dimensional enclosures containing respiring fruits or vegetables is presented. The agricultural produce is treated media exhibiting transversely orthotropic permeability in which local temperature dependent respiration heat generation occurs. In …
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Analysis of vibration reduction via local structural modification
… and more important role in solving practical engineering problems. This thesis develops methods for vibration reduction via local structural modification. In this thesis, the reduction of unwanted vibration in a structural system is principally analysed in two ways, (i) relocation of …
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Analysis and evaluation of a reusable engine packaging system
The research work presented in this thesis is concerned with evaluating a newly designed reusable engine packaging system which has been proposed by the Holden Engine Company for transporting engines manufactured in Australia to the Opel Company in Germany. A description of the experimental …
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Engineering applications of electro-rheological fluids
… (ER) fluids is relatively new in engineering applications. ER fluids can change from liquid to solid-like gel under an electrical field, and this change takes place within milliseconds. The change is reversible once the electrical field is removed. This thesis is an experimental …
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Damage detection in structures using measured frequency response function data
Modern engineering structures such as offshore oil platforms, transmission towers, bridges and aircraft frames are regularly monitored and maintained in order to avert catastrophic failure. Despite our best efforts, sporadic failures, which may have disastrous consequences in terms of human life …
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Modelling the scavenging process in a two-stroke I.C. engine
The primary concern associated with a two-stroke engine performance is its gas exchange process (scavenging process). The success of the scavenging process greatly affects the thermodynamic properties of cylinder content at the trapping conditions and hence the combustion and power output. The …
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Cogeneration in distribution system : planning, operation, transients
This thesis relates to a study of abnormal conditions on a threephase distribution feeder of industry like State Electricity Commission of Victoria (SECV) with several loads and a capacitor bank. An induction generator, which plays the role of a dispersed storage and generation unit, driven by a …
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Vibration control of flexible robot manipulators
This project presents the results of an investigation into the versatility and effectiveness of a vibration control technique for flexible robot manipulators. A two link flexible robotic arm is considered and the dynamic model of the system is derived using the finite element method.
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A smart motor drive system for domestic and industrial applications
… electrical motor, is characterised by a constant mechanical output power of the motor at any rated torque and speed. The mechanical output power of a motor is the product of its torque and speed. For constant power operation, this means that at low speed, a high torque is generated and at high …