Wave to Wire: Optimising Hydrodynamic Performance and Capture Efficiency of Next Generation Ocean Wave Energy Systems. Wave energy in the oceans of the world represents a vast renewable energy resource that has not been tapped. This project will play a crucial role in maximising the performance and economic viability of a unique Australian wave energy technology. We will develop a dynamically integrated theoretical model aimed at capturing the complex behaviour of ocean waves and optimising the ....Wave to Wire: Optimising Hydrodynamic Performance and Capture Efficiency of Next Generation Ocean Wave Energy Systems. Wave energy in the oceans of the world represents a vast renewable energy resource that has not been tapped. This project will play a crucial role in maximising the performance and economic viability of a unique Australian wave energy technology. We will develop a dynamically integrated theoretical model aimed at capturing the complex behaviour of ocean waves and optimising the energy capture efficiency of the Oscillating Water Column (OWC) wave energy system. One of the most exciting aspects of the technology is its potential to provide on-site bulk desalination of seawater, whilst being driven entirely by renewable energy. It will also result in significant reductions in greenhouse gas emissions from electricity generation.Read moreRead less
The novel production and analysis of breaking waves utilising circular-track moving disturbances. Surfing is a major industry in Australia, contributing $11billion to the economy. It has high active participation levels; but locations with good surfing conditions are limited and becoming crowded. New technologies, such as the circular-track wave pool, are required to provide safe environments for surfing with controllable high quality waves. The research in this proposal will considerably advanc ....The novel production and analysis of breaking waves utilising circular-track moving disturbances. Surfing is a major industry in Australia, contributing $11billion to the economy. It has high active participation levels; but locations with good surfing conditions are limited and becoming crowded. New technologies, such as the circular-track wave pool, are required to provide safe environments for surfing with controllable high quality waves. The research in this proposal will considerably advance knowledge of wave mechanics; provide the ability to design a commercially-viable wave pool and ensure the Australian surfing industry and sport continue to expand. The project will thus result in major scientific, economic and social benefits for Australia.Read moreRead less
Wave slam on high speed wave piercing catamaran ferries in large seas. Australia has taken a pioneering lead in the design of high speed multi-hull ferries and continues to extend their speed, range and payload performance. Design leadership and the technology which supports it are crucial to maintaining the existing large share of the international market for such vessels. Recently freight and military transport vessels have been exposed to much more severe wave conditions than passenger vessel ....Wave slam on high speed wave piercing catamaran ferries in large seas. Australia has taken a pioneering lead in the design of high speed multi-hull ferries and continues to extend their speed, range and payload performance. Design leadership and the technology which supports it are crucial to maintaining the existing large share of the international market for such vessels. Recently freight and military transport vessels have been exposed to much more severe wave conditions than passenger vessels and this has increased the need for improved prediction of structural loads due to waves. This project directly addresses that need by computation and model testing validation. The industry is a significant export earner and employer within Australia and so the project directly underpins those national benefits. Read moreRead less
ACTIVE CONTROL OF SURFACE OCEAN SHIPS. This research is to design nonlinear robust adaptive control systems using active actuators (flaps, fins and rudders) for course keeping and path tracking of surface ocean ships, which are inherently nonlinear and with uncertainties. The outcome of the research will lead to the development of non-linear control strategies, which result in simple-to-implement and effective controllers. These controllers are robust to the environmental disturbances and uncert ....ACTIVE CONTROL OF SURFACE OCEAN SHIPS. This research is to design nonlinear robust adaptive control systems using active actuators (flaps, fins and rudders) for course keeping and path tracking of surface ocean ships, which are inherently nonlinear and with uncertainties. The outcome of the research will lead to the development of non-linear control strategies, which result in simple-to-implement and effective controllers. These controllers are robust to the environmental disturbances and uncertainties, adapt to unknown parameters of the ship and actuators. Only a few control gains are required to be tuned. The success of this project will significantly increase the international competiveness of Australian shipbuilding industry.Read moreRead less
Optimal nose shaping for delayed boundary-layer separation and transition in axisymmetric flow. The aim of this project is to design a smooth nose for a body of revolution placed in axisymmetric flow of a viscous fluid at high Reynolds number, such that the boundary layer on the body remains unseparated. This can always be done with a sufficiently long nose, but our objective here is to minimise the necessary nose length. Outer potential flows will be provided via ring sources. The potential flo ....Optimal nose shaping for delayed boundary-layer separation and transition in axisymmetric flow. The aim of this project is to design a smooth nose for a body of revolution placed in axisymmetric flow of a viscous fluid at high Reynolds number, such that the boundary layer on the body remains unseparated. This can always be done with a sufficiently long nose, but our objective here is to minimise the necessary nose length. Outer potential flows will be provided via ring sources. The potential flows will be used to determine inner boundary layer solutions. Transition-to-turbulence will be considered by undertaking 2D and 3D stability computations.Read moreRead less
Asymmetric and nonlinear unsteady loads on high speed ferries. Large high speed catamarans are expanding their domain of application from coastal passenger routes to ocean freight and military service. This is shifting operability criteria from motions and passenger discomfort to structural load limitations in severe wave environments. This project investigates large wave structural load prediction. Large waves lead to strongly non-linear responses, invalidating many methods of analysis. Predict ....Asymmetric and nonlinear unsteady loads on high speed ferries. Large high speed catamarans are expanding their domain of application from coastal passenger routes to ocean freight and military service. This is shifting operability criteria from motions and passenger discomfort to structural load limitations in severe wave environments. This project investigates large wave structural load prediction. Large waves lead to strongly non-linear responses, invalidating many methods of analysis. Prediction of loads on the transverse structure is also not possible with many prediction methods. This project will develop and validate by experiment fully time domain computational methods for the prediction of asymmetric structural loads due to large wavesRead moreRead less
Hydroelasticity of compliant offshore structures. Australia's rich offshore oil and gas reserves are awaiting extensive deepwater extraction. However, there is still a lack of in-depth knowledge in the dynamic behavior of deepwater structures to ensure safe and cost-effective production. We hereby propose hydroelasticity theories and modelling techniques to investigate dynamic fluid-structure interaction problems for compliant offshore structures. We also propose innovative experiments to verify ....Hydroelasticity of compliant offshore structures. Australia's rich offshore oil and gas reserves are awaiting extensive deepwater extraction. However, there is still a lack of in-depth knowledge in the dynamic behavior of deepwater structures to ensure safe and cost-effective production. We hereby propose hydroelasticity theories and modelling techniques to investigate dynamic fluid-structure interaction problems for compliant offshore structures. We also propose innovative experiments to verify the theoretical work. One application is to configure a freestanding compliant tower to suit prospective deepwater oil and gas fields off North-West Australia. Expected outcomes include theoretical and experimental advances in deepwater offshore mechanics and practical computation tools for industry applications.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0239176
Funder
Australian Research Council
Funding Amount
$675,000.00
Summary
High performance computing for mathematics, chemistry, engineering and climate research. The aim of this proposal is to accelerate research across a range of disciplines using high performance computing which is currently limited by the present available computing power. These disciplines include: mathematical modelling of magnetic resonance imaging, computational chemistry, engineering fluid dynamics, climate system modelling including atmosphere, ocean and ice sheet simulations. The Univers ....High performance computing for mathematics, chemistry, engineering and climate research. The aim of this proposal is to accelerate research across a range of disciplines using high performance computing which is currently limited by the present available computing power. These disciplines include: mathematical modelling of magnetic resonance imaging, computational chemistry, engineering fluid dynamics, climate system modelling including atmosphere, ocean and ice sheet simulations. The University of Tasmania, the Antarctic CRC and Australian Antarctic Division are combining resources to share in a joint facility of much greater capability. The proposed new high performance computing facility will increase in the computational power (over a weighted average of our benchmarks) by 13, an 8 fold increase in memory, and a 10 fold increase in disk storage. This new facility will allow these research groups to maintain their internationally leading edge status in high performance computing.Read moreRead less
MODAL AND DIRECTIONAL CHARACTERISTICS OF SEASTATES AND THEIR IMPACT ON DYNAMICS OF MOORED OFFSHORE SYSTEMS. Under certain conditions a typical sea can becomes bimodal comprising of wind-driven seas and long period swells interacting from two directions. Using a nonlinear model, the occurrence and characteristics of bimodal and bi-directional seastates are quantified.
Low frequency oscillations of a moored offshore structure have profound design influence on the mooring system. A nonlinear res ....MODAL AND DIRECTIONAL CHARACTERISTICS OF SEASTATES AND THEIR IMPACT ON DYNAMICS OF MOORED OFFSHORE SYSTEMS. Under certain conditions a typical sea can becomes bimodal comprising of wind-driven seas and long period swells interacting from two directions. Using a nonlinear model, the occurrence and characteristics of bimodal and bi-directional seastates are quantified.
Low frequency oscillations of a moored offshore structure have profound design influence on the mooring system. A nonlinear response model for a floating vessel in bimodal and bi-directional seastates, will be developed using nonlinear dynamics techniques. The numerical models for the environment and the floating platform will be validated by experiments at the Ocean Basin in Canada.
The project adopts a holistic approach by considering the environment and the moored platform as a complex natural system. With excellent opportunities for technology transfer, the project also benefits from substantial in-kind contributions of the overseas PIs.
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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0239920
Funder
Australian Research Council
Funding Amount
$195,000.00
Summary
Control of free/dissolved gas content in a cavitation tunnel. The proposed equipment is for increased productivity and enhancing research capability of the Tom Fink Cavitation Tunnel located at the Australian Maritime College.
The cavitation tunnel is used for investigating flows about ships and underwater bodies.
The proposed equipment permits the rapid control of gas content in the tunnel water either dissolved or free as bubbles which together control the nature of cavitation and other ....Control of free/dissolved gas content in a cavitation tunnel. The proposed equipment is for increased productivity and enhancing research capability of the Tom Fink Cavitation Tunnel located at the Australian Maritime College.
The cavitation tunnel is used for investigating flows about ships and underwater bodies.
The proposed equipment permits the rapid control of gas content in the tunnel water either dissolved or free as bubbles which together control the nature of cavitation and other two phase flows.
The equipment will significant enhance existing research programs in support of the high speed craft and defence sectors of the maritime industry both nationally and internationally.Read moreRead less