Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Civil Engineering (3)
- Civil and Environmental Engineering (3)
- Structural Engineering (3)
- Materials Science and Engineering (2)
- Acoustics, Dynamics, and Controls (1)
-
- Applied Mechanics (1)
- Atomic, Molecular and Optical Physics (1)
- Computational Engineering (1)
- Computer-Aided Engineering and Design (1)
- Condensed Matter Physics (1)
- Construction Engineering and Management (1)
- Dynamics and Dynamical Systems (1)
- Engineering Science and Materials (1)
- Mechanical Engineering (1)
- Metallurgy (1)
- Optics (1)
- Physical Sciences and Mathematics (1)
- Physics (1)
- Keyword
-
- Magnetic (11)
- For (9)
- Superconducting (9)
- Analysis (8)
- Properties (8)
-
- Effect (7)
- High (7)
- Superconductivity (7)
- Based (6)
- Current (6)
- Engineering (6)
- MgB2 (6)
- Performance (6)
- Steel (6)
- System (6)
- Temperature (6)
- Applications (5)
- Control (5)
- Flux (5)
- Induced (5)
- Behavior (4)
- Boron (4)
- Design (4)
- Development (4)
- Effects (4)
- Energy (4)
- Graphene (4)
- Influence (4)
- Low (4)
- Optical (4)
Articles 1 - 30 of 153
Full-Text Articles in Engineering
Relationship Between Impact Energy And Fracture Toughness Of Prestressed Concrete Railway Sleepers, Sakdirat Kaewunruen, Alexander Remennikov
Relationship Between Impact Energy And Fracture Toughness Of Prestressed Concrete Railway Sleepers, Sakdirat Kaewunruen, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
The prestressed concrete sleepers (or railroad ties), which are installed in railway track systems as the crosstie beam support, are designed to carry and transfer the wheel loads from the rails to the ground. It is well known that railway tracks are subject to impact loading conditions, which are attributable to the train operations with either wheel or rail abnormalities such as flat wheels, dipped rails, etc. These loads are of very high magnitude but short duration. In addition, there exists the potential of repeated load experience during the design life of prestressed concrete sleepers. Prestressed concrete has played a …
Peeling Adhesive Tape Emits Electromagnetic Radiation At Terahertz Frequencies, J. Horvat, R. A. Lewis
Peeling Adhesive Tape Emits Electromagnetic Radiation At Terahertz Frequencies, J. Horvat, R. A. Lewis
Faculty of Engineering - Papers (Archive)
An unusual concept for a simple and inexpensive terahertz source is presented: unpeeling adhesive tape. The observed spectrum of this terahertz radiation exhibits a peak at 2 THz and a broader peak at 18 THz. The radiation is not polarized. The mechanism of terahertz radiation is tribocharging of the adhesive tape and subsequent discharge, possibly bremsstrahlung with absorption or energy density focusing during the dielectric breakdown of a gas. The accompanying optical emission is also a consequence of tribocharging.
Rail Short-Wavelength Irregularity Identification Based On Wheel-Rail Impact Response Measurements And Simulations, Y. Q. Sun, C. Cole, M. Mcclanachan, A. Wilson, S. Kaewunruen, M. B. Kerr
Rail Short-Wavelength Irregularity Identification Based On Wheel-Rail Impact Response Measurements And Simulations, Y. Q. Sun, C. Cole, M. Mcclanachan, A. Wilson, S. Kaewunruen, M. B. Kerr
Faculty of Engineering - Papers (Archive)
Long and short-wavelength dip defects unavoidably exist on railway track top surface. Several manual measurement methods and AK track measurement car were used to measure and to identify these types of defects in a selected track section. The paper considers rail dip irregularities in detail when measured, the dip can be considered as two components. The first one is the large, long dip profile, which can be measured by the survey leveling. The other is a small short dip profile, which is superimposed on the large profile and can be measured using the dip gauge. The corresponding measurement and processed …
State Dependent Properties Of Rail Pads, Sakdirat Kaewunruen, Alexander Remennikov
State Dependent Properties Of Rail Pads, Sakdirat Kaewunruen, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
Rail pad is one of the main components in ballasted railway track systems. It is inserted between the rail and the sleeper to attenuate dynamic wheel/rail interaction forces, preventing the underlying railway track components from excessive stresses. Generally, the dynamic design of tracks relies on the available data, which are mostly focused on the structural condition at a specific toe load. Recent findings show that track irregularities could significantly amplify the loads on railway tracks. This phenomenon gives rise to a concern that the rail pads may experience higher deterioration rate than anticipated in the past. On this ground, an …
The Wetting Of Liquid Iron Carbon On Aluminate Minerals Formed During Coke Dissolution In Iron, B. J. Monaghan, M. Chapman, S A. Nightingale
The Wetting Of Liquid Iron Carbon On Aluminate Minerals Formed During Coke Dissolution In Iron, B. J. Monaghan, M. Chapman, S A. Nightingale
Faculty of Engineering - Papers (Archive)
From previous studies by the authors on the effects of mineral layer formation at coke-iron boundary during coke dissolution it was found that the composition and morphology of the layer had a profound affect on the kinetics of reaction. Moreover it was found that the layer was primarily composed of calcium aluminate’s that over time (0-120 minutes) became progressively enriched with calcium. The minerals identified in the layer were alumina, CA6, CA2 and CA. Given that coke dissolution in iron is a heterogeneous reaction it can be expected that the wetting of iron on these minerals would have a significant …
Trends In Vibration-Based Structural Health Monitoring Of Railway Sleepers, Sakdirat Kaewunruen, Alexander Remennikov
Trends In Vibration-Based Structural Health Monitoring Of Railway Sleepers, Sakdirat Kaewunruen, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
Today vibration-based structural health monitoring (SHM) has been widely used in many applications, i.e. mechanical, civil, or aerospace engineering. Over last decades, SHM has been investigated for uses in those applications as an alternative tool to the costly visual inspections. Most of the SMH applications make effective use of experimental modal analysis and finite element model updating whereas this approach consumes reasonable cost for instrumentation and device (generally only a few accelerometers installed on the structure). In railway communities however, SHM technologies have not been widely adopted as the rail track engineers lack efficient tools and instrumentation to process the …
Effect Of Pre-Straining And Bake Hardening On The Microstructure And Mechanical Properties Of Cmnsi Trip Steels, L. C. Zhang, I. B. Timokhina, A. La Fontaine, S. P. Ringer, P. D. Hodgson, E V. Pereloma
Effect Of Pre-Straining And Bake Hardening On The Microstructure And Mechanical Properties Of Cmnsi Trip Steels, L. C. Zhang, I. B. Timokhina, A. La Fontaine, S. P. Ringer, P. D. Hodgson, E V. Pereloma
Faculty of Engineering - Papers (Archive)
The effects of pre-straining and bake hardening on the mechanical behaviour and microstructural changes were studied in two CMnSi TRansformation-Induced Plasticity (TRIP) steels with different microstructures after intercritical annealing. The TRIP steels before and after pre-straining and bake hardening were characterised by X-ray diffraction, optical microscopy, transmission electron microscopy, three dimensional atom probe and tensile tests. Both steels exhibited discontinuous yielding behaviour and a significant strength increase with some reduction in ductility after pre-straining and bake hardening treatment. The following main microstructural changes are responsible for the observed mechanical behaviours: a decrease in the volume fraction of retained austenite, an …
Modelling Of Combined Vacuum And Surcharge Preloading With Vertical Drains, Buddhima Indraratna, Cholackat Rujikiatkamjorn, Richard Kelly
Modelling Of Combined Vacuum And Surcharge Preloading With Vertical Drains, Buddhima Indraratna, Cholackat Rujikiatkamjorn, Richard Kelly
Faculty of Engineering - Papers (Archive)
In this study, 2D and 3D numerical analyses were conducted to predict embankment behaviour on soft clay foundations stabilised by Combined Vacuum and Surcharge Preloading. To determine the equivalent plane strain permeability, a revised conversion procedure for plane strain condition considering linear permeability variation in the smear zone is proposed. The equivalent permeability coefficients are then incorporated in finite element codes, employing the modified Cam-clay theory. The advantages and limitations of vacuum application through vertical drains are discussed through two selected case histories from China and Australia and the predictions are compared with the available field data. Apart from realistic …
Fast And Accurate Proton Computed Tomography Image Reconstruction For Applications In Proton Therapy, Scott Penfold, R. W. Schulte, V. Bashkirov, Anatoly B. Rosenfeld
Fast And Accurate Proton Computed Tomography Image Reconstruction For Applications In Proton Therapy, Scott Penfold, R. W. Schulte, V. Bashkirov, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Proton computed tomography has been suggested as a means for maximizing the potential benefits of proton radiation therapy. By measuring individual proton energy losses after traversing an object and predicting paths of maximum likelihood through the image space, relative stopping power maps can be generated for treatment planning and image guidance. However, the processes of proton interaction with the imaged object lead to a number of challenges in the image reconstruction procedure. In this work we describe our approach to obtaining accurate relative stopping power maps in the shortest amount of time.
Application Of Vibration Measurements And Finite Element Model Updating For Structural Health Monitoring Of Ballasted Railtrack Sleepers With Voids And Pockets, Sakdirat Kaewunruen, Alexander Remennikov
Application Of Vibration Measurements And Finite Element Model Updating For Structural Health Monitoring Of Ballasted Railtrack Sleepers With Voids And Pockets, Sakdirat Kaewunruen, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
Although vibration measurements are very useful and common in practice nowadays in many applications related to mechanical, civil, and aerospace engineering, the utilisation in railtrack infrastructure and facilities is not widely established. This chapter deals with the application of vibration measurements and finite element model updating to the assessment of ballasted railtrack sleepers, in particular with a void and pocket condition. It describes the concept of vibration measurements and the understanding into the dynamic behaviour of ballasted railtrack sleepers. It discusses briefly on the development of finite element model of in-situ sleeper and its updating. Then, the application to structural …
Strong Nonlinear Optical Response In Graphene In Terahertz Regime, Anthony Wright, Xuguang Xu, J. C. Cao, Chao Zhang
Strong Nonlinear Optical Response In Graphene In Terahertz Regime, Anthony Wright, Xuguang Xu, J. C. Cao, Chao Zhang
Faculty of Engineering - Papers (Archive)
We demonstrate that within the model of massless Dirac fermions, graphene has a strong nonlinear optical response in the terahertz regime. It is found that the nonlinear contribution significantly alters both the single frequency and frequency tripled optical response at experimentally relevant field strengths. The optical activity of single layer graphene is significantly enhanced by nonlinear effects, and the frequency tripled response opens the gateway to photonic and optoelectronic device applications.
Improved Controller For High Temperature Super Conducting Magnetic Energy Storage (Hts-Smes), Danny Soetanto, M V. Aware
Improved Controller For High Temperature Super Conducting Magnetic Energy Storage (Hts-Smes), Danny Soetanto, M V. Aware
Faculty of Engineering - Papers (Archive)
This paper describes a novel controller for a High Temperature Superconducting Magnetic Energy Storage (HTSSMES) that can ensure (a) fast return of energy to the superconducting coil under constant current mode and (b) a constant and sinusoidal input supply current irrespective of the varying load demand with and without harmonics. A special feature of this controller is its ability to smoothly charge the superconducting coil using constant current charging so that it can be ready for the next discharging operation as soon as possible. Analysis of the circuit operation under hysteresis control is presented in details. Simulation and experimental results …
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Faculty of Engineering - Papers (Archive)
Advancement in both superconducting technologies and power electronics led to High Temperature Superconducting Magnetic Energy Storage Systems (SMES) having some excellent performances for use in power systems, such as rapid response (millisecond), high power (multi-MW), high efficiency, and four- quadrant control. This paper provides a review on SMES applications to power systems.
Students Views On Engineering Mechanics Education And The Implications For Educators, Thomas Goldfinch, Giles Thomas, Anna L. Carew
Students Views On Engineering Mechanics Education And The Implications For Educators, Thomas Goldfinch, Giles Thomas, Anna L. Carew
Faculty of Engineering - Papers (Archive)
This paper presents findings of a qualitative study conducted as part of a larger project to address the issue of high failure rates in first year engineering mechanics. Engineering student focus groups were held at two institutions, and were asked about the subject area, curriculum, and their approaches to study. Eight academics were also interviewed individually on the same topics to provide some context for the focus group outcomes. Documented responses revealed a tendency for both groups to focus on the most negative or extreme examples as cases which were representative of a wider situation. Although the focus group and …
Hybrid Fuel Cell And Energy Storage Systems Using Superconducting Coil Or Batteries For Clean Electricity Generation, Danny Soetanto, Kai Ding
Hybrid Fuel Cell And Energy Storage Systems Using Superconducting Coil Or Batteries For Clean Electricity Generation, Danny Soetanto, Kai Ding
Faculty of Engineering - Papers (Archive)
This paper described a novel design of a hybrid fuel cell and energy storage system using high temperature superconducting energy storage system (HT-SMES) or batteries to meet fast changing load. The power electronic switches in the converter of the energy storage system are controlled in such a way that the amplitude and waveform of the inverter output current from the fuel cell is tightly regulated to follow a sinusoidal reference waveform. In this way, the energy storage system is used to supply the fast changing part of the load and the fuel cell system continuously supplies a constant full load …
Peer Observation Of Teaching: Engineering New Skills And Collegiality, Paul Cooper, Maureen Bell
Peer Observation Of Teaching: Engineering New Skills And Collegiality, Paul Cooper, Maureen Bell
Faculty of Engineering - Papers (Archive)
Academics in a school of engineering at the University of Wollongong participated in a peer observation of teaching pilot program using a partnership approach. All participants subsequently completed a questionnaire and were interviewed about the characteristics and effectiveness of the program. The average time spent by the academics participating was approximately 5 hours. Participants’ evaluation of the program was overwhelmingly positive with outcomes including development of skills, ideas for teaching and giving feedback, and increased confidence. The development of collegiality within the peer observation partnership groups and the school was an especially strong outcome. All participants requested some kind of …
A Knowledge Framework For Analysis Of Engineering Mechanics Exams, Thomas Goldfinch, Anna L. Carew, Timothy J. Mccarthy
A Knowledge Framework For Analysis Of Engineering Mechanics Exams, Thomas Goldfinch, Anna L. Carew, Timothy J. Mccarthy
Faculty of Engineering - Papers (Archive)
In an ongoing research project focusing on improving learning in first year engineering mechanics, a framework for engineering mechanics knowledge has been identified. The framework has been applied to break down and categorise common mistakes made by students at four separate institutions to find out where students are struggling in their efforts to learn statics and dynamics. The framework separates knowledge into factual, procedural, conceptual, and principle areas in a semi hierarchical manner. In using this framework, it has become clearly evident that the marks students are awarded for their work tend to be biased towards procedural knowledge, rather than …
A Particle Swarm Optimisation Approach To Reinforced Concrete Beam Design According To As3600, Timothy J. Mccarthy, Sean Mccluskey
A Particle Swarm Optimisation Approach To Reinforced Concrete Beam Design According To As3600, Timothy J. Mccarthy, Sean Mccluskey
Faculty of Engineering - Papers (Archive)
A program has been developed to utilise the Particle Swarm Optimisation Algorithm for the cost optimum design of reinforced concrete beams. Multiple constraints according to Australian Standard 3600 have been implemented along with costing information. A series of tests where conducted to investigate the effect of different parameters of the particle swarm algorithm and some refinement of these parameters was conducted. The value penalty coefficients had a significant effect on the results, causing non-convergence when very large penalty coefficients where used, and convergence on non-viable results when very small penalty coefficients where used.
Removal Of Inorganic Trace Contaminants By Electrodialysis In A Remote Australian Community, L J. Banasiak, A I. Schafer
Removal Of Inorganic Trace Contaminants By Electrodialysis In A Remote Australian Community, L J. Banasiak, A I. Schafer
Faculty of Engineering - Papers (Archive)
Water provision for developing countries is a critical issue as a vast number of lives are lost annually due to lack of access to safe drinking water. The presence and fate of inorganic trace contaminants is of particular concern. Trace inorganic contaminants have been found in elevated concentrations in drinking waters supplied directly from brackish groundwaters in developing countries. Desalination and the removal of trace inorganic contaminants from bore water sources from a remote community in Australia using electrodialysis (ED) were investigated. The influence of applied voltage on the removal of the trace contaminants was evaluated. While the results from …
Ride Performance Analysis Of Half-Car Model For Semi-Active System Using Rms As Performance Criteria, Sany Ihsan, Mehdi Ahmadian, Waleed Faris, Emmanuel D. Blanchard
Ride Performance Analysis Of Half-Car Model For Semi-Active System Using Rms As Performance Criteria, Sany Ihsan, Mehdi Ahmadian, Waleed Faris, Emmanuel D. Blanchard
Faculty of Engineering - Papers (Archive)
The work aims to study the root mean square (RMS) responses to acceleration input for four state variables: the mS vertical acceleration, the mS pitch angular acceleration and the front and rear deflections of the suspensions. A half-car two degree-of-freedom model of semi-active control scheme is analyzed and compared with the conventional passive suspension system. Frequency response of the transfer function for the heave, pitch of the sprung mass and suspension deflections are initially compared and then mean square analysis is utilized to see the effect of semi-active scheme. Results indicate that significant improvements were achieved in the …
Q-Learning Algorithm For Navigation Control Of Autonomous Blimp, Yiwei Liu, Zengxi Pan, David A. Stirling, Fazel Naghdy
Q-Learning Algorithm For Navigation Control Of Autonomous Blimp, Yiwei Liu, Zengxi Pan, David A. Stirling, Fazel Naghdy
Faculty of Engineering - Papers (Archive)
In this research, an autonomous control system for blimp navigation was developed using reinforcement learning algorithm. The aim of this research is to provide a blimp the capability to approach a goal position autonomously in an environment, where the dynamical models of the blimp and the environment are unknown. Webots™ Robotics Simulator (WRS) was used to simulate and evaluate the control strategy obtained through a one-step Q-learning method. The simulation data generated via WRS were then processed and analysed within MATLAB. The simulation results showed that the control policy acquired from Q-learning is much more effective compared to the traditional …
Control Of Autonomous Airship, Yiwei Liu, Zengxi Pan, David A. Stirling, Fazel Naghdy
Control Of Autonomous Airship, Yiwei Liu, Zengxi Pan, David A. Stirling, Fazel Naghdy
Faculty of Engineering - Papers (Archive)
Scientific research and development on the control of autonomous airship have shown a significant growth in recent years. New applications appear in the areas such as freight carrier, advertising, monitoring, surveillance, transportation, military and scientific research. The control of Autonomous airship is a very important problem for the aerial robots research. In this paper, the previous research on the control of autonomous blimp is reviewed, Several popular control methods are categorized and discussed in detail. Then an intelligent navigation control method, reinforcement learning control, is introduced in the autonomous blimp which was used for 2007 UAV Outback Challenge. The future …
Motion Capture In Robotics Review, Matthew Field, David A. Stirling, Fazel Naghdy, Zengxi Pan
Motion Capture In Robotics Review, Matthew Field, David A. Stirling, Fazel Naghdy, Zengxi Pan
Faculty of Engineering - Papers (Archive)
This survey reviews motion capture technologies and the current challenges associated with their application in robotic systems. Various sensor systems used in current literature are introduced and evaluated based on the relative strengths and weaknesses. Some research problems pursued with these sensors in robotics are reviewed and application areas are discussed. Significant methodologies in analysing the sensor data are discussed and evaluated based on the perceived benefits and limitations. Finally, results from experimentation with an inertial motion capture system are shown based on clustering and segmentation techniques.
Adding Value To Physics Labs To Help Build Confident, Knowledgeable Teachers, Lorna Jarrett, Brian Ferry, George J. Takacs
Adding Value To Physics Labs To Help Build Confident, Knowledgeable Teachers, Lorna Jarrett, Brian Ferry, George J. Takacs
Faculty of Engineering - Papers (Archive)
Abstract: This pilot study is being conducted by an interdisciplinary team and is funded through the University of Wollongong Education Strategies Development Fund. The project focuses on the first-year physics laboratories of pre- service teachers enrolled in Bachelor of Science Education degrees. It aims to make the laboratory experience more aligned to the needs of future science and physics teachers, contributing to their confidence in using apparatus in the classroom and their effectiveness as communicators who can explain concepts fluently from a background of deep understanding. According to Mulhall (2006) and Johnston and Millar (2000), misconceptions are common even among …
Analysis Of Droplet Generation In Oxygen Steelmaking, Neslihan Dogan, Geoffrey Brooks, Akbar Rhamdhani
Analysis Of Droplet Generation In Oxygen Steelmaking, Neslihan Dogan, Geoffrey Brooks, Akbar Rhamdhani
Faculty of Engineering - Papers (Archive)
Knowledge of droplet generation during oxygen blowing, which can be characterized by a blowing number (NB), is crucial for better understanding of the fundamentals of the kinetics of oxygen steelmaking. A mathematical model has been developed considering the influence of surface tension on the blowing number (NB) using plant data from the study of Holappa and Jalkanen. The model predicts the droplet formation as a function of carbon, sulphur and oxygen contents in the metal, the temperature profile of the metal bath and lance height. This study includes a sensitivity analysis to investigate the …
Analyzing Harmonic Monitoring Data Using Supervised And Unsupervised Learning, Ali Asheibi, David Stirling, Danny Soetanto
Analyzing Harmonic Monitoring Data Using Supervised And Unsupervised Learning, Ali Asheibi, David Stirling, Danny Soetanto
Faculty of Engineering - Papers (Archive)
Harmonic monitoring has become an important tool for harmonic management in distribution system. A comprehensive harmonic monitoring program has been designed and implemented on a typical electrical medium-voltage distribution system in Australia. The monitoring program involved measurements of the three-phase harmonic currents and voltages from the residential, commercial, and industrial load sectors. Data over a three year period have been downloaded and available for analysis. The large amount of acquired data makes it difficult to identify operational events that significantly impact the harmonics generated on the system. More sophisticated analysis methods are required to automatically determine which part of the …
Groundwater Recovery Simulation For Determination Of Post-Mining Lake Formation At The Sangan Iron Mine, Mashhad, Iran, Ahmad Aryafar, F. Doulati Ardejani, E. Baafi
Groundwater Recovery Simulation For Determination Of Post-Mining Lake Formation At The Sangan Iron Mine, Mashhad, Iran, Ahmad Aryafar, F. Doulati Ardejani, E. Baafi
Faculty of Engineering - Papers (Archive)
A two-dimensional axisymetric finite element software SEEP/W was used to simulate the groundwater recovery process in wells entirely confined in an aquifer at Sangan iron mine in Iran. The simulation model predicted very well with the results obtained from both analytical method and field data for well recovery process. It was inferred from the results that the rate of groundwater recovery process is highest immediately after mine closure with no dewatering program. The paper presents a methodology for predicting how the natural groundwater regime can be established to its equilibrium conditions after mining operation has ceased.
Controlled Synthesis Of Core/Shell Magnetic Iron Oxide/Carbon Systems Via A Self-Template Method, Shenmin Zhu, Di Zhang, Z. Chen, Yimu Zhang
Controlled Synthesis Of Core/Shell Magnetic Iron Oxide/Carbon Systems Via A Self-Template Method, Shenmin Zhu, Di Zhang, Z. Chen, Yimu Zhang
Faculty of Engineering - Papers (Archive)
A sol-gel assembly process was developed for the synthesis of magnetic core/carbon shell materials with porous networks. Fe(CO)5 was assembled into the pore channels of mesoporous silica via a sol-gel method at 18 °C, by using the block copolymer F127 as the template and Fe(CO)5 as an additional precursor. At this temperature, the magnetic precursor Fe(CO)5 was pre-organized into hydrophobic cores of micelles by self-assembly of F127. In the subsequent carbonization of the assembly under an Ar atmosphere, Fe(CO)5 transformed into magnetic nanoparticles and surfactant F127 transferred into carbon shells enveloping the magnetic nanoparticles, forming magnetic …
Self-Oriented Ca3co4o9 Thin Film As An Anode Material For Enhanced Cycling Stability Of Lithium-Ion Batteries, Xuebin Zhu, Shulei Chou, Lin Wang, Qi Li, Dongqi Shi, Jiazhao Wang, Z. Chen, Yuping Sun, Hua-Kun Liu, S. X. Dou
Self-Oriented Ca3co4o9 Thin Film As An Anode Material For Enhanced Cycling Stability Of Lithium-Ion Batteries, Xuebin Zhu, Shulei Chou, Lin Wang, Qi Li, Dongqi Shi, Jiazhao Wang, Z. Chen, Yuping Sun, Hua-Kun Liu, S. X. Dou
Faculty of Engineering - Papers (Archive)
Self-oriented Ca3Co4O9 nanoflake thin film has been prepared by a simple sol–gel method as the anode for thin-film lithium-ion batteries. The X-ray diffraction and transmission electron microscopy results show that the prepared Ca3Co4O9/Pt film is -axis self-oriented and composed of nanoflakes approximately 2ym in diameter and 200–300 nm thick. The reversible lithium storage capacity of the Ca3Co4O9 thin-film electrode at 1 C is around 800mAhg-1 , and it retains more than 70% capacity after 50 cycles, suggesting that the Ca3Co4 …
Cfd Analysis Of Air Turbines As Power Take-Off Systems In Oscillating Water Column Wave Energy Conversion Plant, Andrei Gareev, Paul Cooper, Kosasih
Cfd Analysis Of Air Turbines As Power Take-Off Systems In Oscillating Water Column Wave Energy Conversion Plant, Andrei Gareev, Paul Cooper, Kosasih
Faculty of Engineering - Papers (Archive)
This paper presents the results of CFD simulations of reversing flow air turbines used as the power takeoff system in Oscillating Water Column (OWC) Wave Energy Conversion (WEC) plant. One of the simpler tools to analyse such turbines is the blade element/actuator disc methodology. This requires the input of “interference factors” to model how the lift and drag characteristics of the cascade of blades on the turbine rotor are related to those of a single isolated aerofoil. In the first part of the paper, CFD modelling to obtain the lift and drag characteristics of various aerofoils arranged in linear cascades …