Rarefied hypervelocity separated flow in the transitional to continuum regimes. The transition regime for low-density flows is a no-man's-land between free-molecular and continuum flow, where the flow behaves differently to the assumptions typically used for modelling either flow type. Bird's direct Simulation Monte Carlo (DSMC) method is typically thought to be the best way of modelling these flows, but has not produced excellent agreement with previous experiments on low-density separated flow ....Rarefied hypervelocity separated flow in the transitional to continuum regimes. The transition regime for low-density flows is a no-man's-land between free-molecular and continuum flow, where the flow behaves differently to the assumptions typically used for modelling either flow type. Bird's direct Simulation Monte Carlo (DSMC) method is typically thought to be the best way of modelling these flows, but has not produced excellent agreement with previous experiments on low-density separated flows, due to computational limitations and lack of knowledge of the flow's internal energy. This proposal is a blind test of the best current DSMC codes against our experiments and a hypersonic continuum code, with the full internal energy state of the flow experimentally quantified for the first time.Read moreRead less
Shape adaptive structures with built-in compact smart material based actuators. Primary Australian aerospace manufacturers are sub-contractors and constantly compete in the global market. Their products are primarily control surfaces, e.g., Boeing 757 and 777 rudders, 737 Krueger flaps. In light of the development of the hingeless control surfaces (HCS) in the smart aircraft wing program in the USA, the economic benefits of this project are very high because (a) it will address the key technolo ....Shape adaptive structures with built-in compact smart material based actuators. Primary Australian aerospace manufacturers are sub-contractors and constantly compete in the global market. Their products are primarily control surfaces, e.g., Boeing 757 and 777 rudders, 737 Krueger flaps. In light of the development of the hingeless control surfaces (HCS) in the smart aircraft wing program in the USA, the economic benefits of this project are very high because (a) it will address the key technological issue identified in the HCS program; and (b) it will enhance Australian manufacturers¡¯ technological standing and input in the design and manufacturing of next generation HCS by providing highly trained people with world-leading niche technology.Read moreRead less
Structural and multidisciplinary optimization. Structural and multidisciplinary design optimization is an important subject in aeronautical, aerospace, automobile, offshore platforms and many other structures. This project aims to address design optimization of coupled structures, with a focus on electro-mechanical coupled structures. It is expected to coordinate an integrated effort to develop efficient and effective algorithms for optimum design of electro-mechanical coupled structures.
Acoustic loads on hypersonic engines. This project aims to understand how acoustic loads are generated in supersonic combustion ramjets (scramjets) to control sonic fatigue in reusable hypersonic vehicles. This knowledge could make space access affordable. This project will measure acoustic waves in scramjets. The anticipated discoveries will enable reusable, hypersonic vehicles to be used for space launch systems and high-speed aircraft. These systems will dramatically reduce the cost of space ....Acoustic loads on hypersonic engines. This project aims to understand how acoustic loads are generated in supersonic combustion ramjets (scramjets) to control sonic fatigue in reusable hypersonic vehicles. This knowledge could make space access affordable. This project will measure acoustic waves in scramjets. The anticipated discoveries will enable reusable, hypersonic vehicles to be used for space launch systems and high-speed aircraft. These systems will dramatically reduce the cost of space launch and global travel times. Expected benefits include reduced cost for access to space and the ability to design and develop advanced aerospace technology.Read moreRead less
Fluid-structural interactions in high-speed flows. This project aims to perform experiments to measure fluid-structure interaction in hypersonic flows. The work will improve the accuracy of simulation tools that are urgently required to aid industry in the design of more structurally efficient and robust high-speed vehicles. These tools will in turn be used to reveal the underlying physics of the fluid-structure interactions and establish the relative significance of the driving parameters. Accu ....Fluid-structural interactions in high-speed flows. This project aims to perform experiments to measure fluid-structure interaction in hypersonic flows. The work will improve the accuracy of simulation tools that are urgently required to aid industry in the design of more structurally efficient and robust high-speed vehicles. These tools will in turn be used to reveal the underlying physics of the fluid-structure interactions and establish the relative significance of the driving parameters. Accurate prediction of the behaviour and lifetime of structural components subject to these fluid-structural interactions, in which the deformation of the structure induced by the local flow field, can in turn influence this flow field. This coupling can result in damage or even catastrophic structural failure and thus robust design tools must be developed to avoid this.Read moreRead less
Physics of Base Flows of Planetary Entry Configurations. Continued investment by Australia in the AHI will help to maintain Australia's leading role in the exciting fields of space research and hypersonics and to encourage future international collaboration. The research will use the unique existing experimental infrastructure (largely ARC funded) for space related research, which will enable Australia to make a valuable contribution to the design of future planetary missions. The project will p ....Physics of Base Flows of Planetary Entry Configurations. Continued investment by Australia in the AHI will help to maintain Australia's leading role in the exciting fields of space research and hypersonics and to encourage future international collaboration. The research will use the unique existing experimental infrastructure (largely ARC funded) for space related research, which will enable Australia to make a valuable contribution to the design of future planetary missions. The project will provide a stimulating, exciting and supportive environment for the training of postgraduate and postdoctoral personnel as well as students at the undergraduate level. It will help to motivate young Australians to pursue their interest in science and engineering.Read moreRead less
Active shape control of large thin-walled structures using ferroelectric single crystals. Ferroelectric single crystals were invented 5 years ago, and they possess many superior properties compared to conventional piezoelectric materials, particularly the induced strain up to 1.5%, an order higher than conventional materials. This project aims to poineer the application of these new and powerful smart materials as actuators and sensors to shape control of smart structures. The expected outcome ....Active shape control of large thin-walled structures using ferroelectric single crystals. Ferroelectric single crystals were invented 5 years ago, and they possess many superior properties compared to conventional piezoelectric materials, particularly the induced strain up to 1.5%, an order higher than conventional materials. This project aims to poineer the application of these new and powerful smart materials as actuators and sensors to shape control of smart structures. The expected outcomes are (a) a new constitutive theory for the non-linear behaviour of ferroelectric single crystals; (b) a novel definition and formulation for the shape control problem; and (c) an innovative theoretical framework for design optimization of shape control of smart structures using ferroelectric single crystals.Read moreRead less
Morphing flexible structures with lead lanthanum zirconium titanate (PLZT) based optical actuators. Lead lanthanum zirconate titanate (PLZT) materials yield mechanical strains when exposed to near ultraviolet light as a result of combined photovoltaic and converse piezoelectric effects. They offer actuation strain on par with piezoelectric materials and other advantages, such as wireless light-to-mechanical energy transfer, immunity from electrical and magnetic disturbances and fast response wi ....Morphing flexible structures with lead lanthanum zirconium titanate (PLZT) based optical actuators. Lead lanthanum zirconate titanate (PLZT) materials yield mechanical strains when exposed to near ultraviolet light as a result of combined photovoltaic and converse piezoelectric effects. They offer actuation strain on par with piezoelectric materials and other advantages, such as wireless light-to-mechanical energy transfer, immunity from electrical and magnetic disturbances and fast response with the transparent electrode design. This project aims to pioneer the application of PLZT optical actuators in morphing flexible structures leading to development of wireless smart structures technology and opt-electromechanical systems such as medical instruments.Read moreRead less
Automated helicopter hover and recovery system for operations at sea. The small size and simplicity of the integrated system outlined in this project will significantly improve the effectiveness of maritime surveillance for homeland security whilst enabling substantially lower operational costs. The proposal aims to develop control and sensing techniques, enabling small rotary wing unmanned air-vehicles (UAVs) weighing less than 100 kgs to operate from small-size vessels. This will be achieved ....Automated helicopter hover and recovery system for operations at sea. The small size and simplicity of the integrated system outlined in this project will significantly improve the effectiveness of maritime surveillance for homeland security whilst enabling substantially lower operational costs. The proposal aims to develop control and sensing techniques, enabling small rotary wing unmanned air-vehicles (UAVs) weighing less than 100 kgs to operate from small-size vessels. This will be achieved by resolving the current lack of integration between ship motion and the unmanned vehicle guidance systems. The proposed research will make substantial contributions in areas of ship motion prediction and sensing and hover control of tethered and non-tethered small helicopters.
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Topology Optimisation of Periodic Structures for Stent Design. Stenting therapy offers new therapeutical strategies to improve the quality of healthcare for numerous cardiovascular disease patients. This project will address the critical issues in stent design involving the delivery, dilatation and ongoing interaction with blood vessel and fluid. The novel topological configurations are expected to bring significant improvement to stent ensuring long-term success. The numerical techniques to be ....Topology Optimisation of Periodic Structures for Stent Design. Stenting therapy offers new therapeutical strategies to improve the quality of healthcare for numerous cardiovascular disease patients. This project will address the critical issues in stent design involving the delivery, dilatation and ongoing interaction with blood vessel and fluid. The novel topological configurations are expected to bring significant improvement to stent ensuring long-term success. The numerical techniques to be developed for optimising topology will provide new tools for design of periodic structures, making a broader impact on an important class of engineering structures and thus benefiting many relevant fields.Read moreRead less