Fluid physics of cold gas-dynamic spray process. Cold gas-dynamic spray has the potential to revitalize and revolutionize the Australian manufacturing sector and economy. It is a technologically advanced flexible free-forming process with potential applications in the aviation, automotive, naval and bio-medical sectors. It allows for the design of functional surfaces from the nano-scale to the macro-scale that can be manufactured by spraying material coatings of arbitrary thickness and density o ....Fluid physics of cold gas-dynamic spray process. Cold gas-dynamic spray has the potential to revitalize and revolutionize the Australian manufacturing sector and economy. It is a technologically advanced flexible free-forming process with potential applications in the aviation, automotive, naval and bio-medical sectors. It allows for the design of functional surfaces from the nano-scale to the macro-scale that can be manufactured by spraying material coatings of arbitrary thickness and density on a substrate. The process of the spray particle delivery is crucial and not understood. This research will investigate the fluid physics and spray particle physics to gain the essential understanding necessary to make this process energy efficient and extend its range of application.Read moreRead less
Silencing the screech tone - noise suppression in supersonic jets. The focus of this research is to further develop understanding of the fundamental mechanics of the aeroacoustic phenomenon known as screech. From this deeper understanding a range of tailored control mechanisms are expected to be developed to reduce or eliminate the effects of screech in the engines of high-speed aircraft. The research builds on existing expertise and established experimental facilities. As well as an improved un ....Silencing the screech tone - noise suppression in supersonic jets. The focus of this research is to further develop understanding of the fundamental mechanics of the aeroacoustic phenomenon known as screech. From this deeper understanding a range of tailored control mechanisms are expected to be developed to reduce or eliminate the effects of screech in the engines of high-speed aircraft. The research builds on existing expertise and established experimental facilities. As well as an improved understanding of fundamental mechanism, the expected outcomes of the research are more efficient active and passive flow control devices for the reduction of supersonic jet noise.Read moreRead less
A novel approach to controlling boundary-layer separation. This project will involve fundamental research into the control of the fluid dynamical phenomena of boundary-layer separation and transition to turbulence. The project will be built upon a firm foundation of mathematical modelling of the complex behaviour of fluid flows that are near the onset of flow separation or turbulence. The project will produce results that will permit the development of control strategies that can be implemented ....A novel approach to controlling boundary-layer separation. This project will involve fundamental research into the control of the fluid dynamical phenomena of boundary-layer separation and transition to turbulence. The project will be built upon a firm foundation of mathematical modelling of the complex behaviour of fluid flows that are near the onset of flow separation or turbulence. The project will produce results that will permit the development of control strategies that can be implemented in a wide variety of important technological applications, such as drag reduction in the aerospace and ship industries as well as the control of stall (or loss of lift) in modern aircraft.Read moreRead less
Application of exact coherent structures to transition and turbulence. This project aims to understand coherent structures and devise methods to prevent bypass transition to turbulence and reduce turbulent wall drag. Coherent structures in turbulence may be identified with nonlinear solutions of the exact equations of motion. Such "exact" coherent structures have their Reynolds number dependence described explicitly and apply for moderate to very large Reynolds numbers, well above the range of f ....Application of exact coherent structures to transition and turbulence. This project aims to understand coherent structures and devise methods to prevent bypass transition to turbulence and reduce turbulent wall drag. Coherent structures in turbulence may be identified with nonlinear solutions of the exact equations of motion. Such "exact" coherent structures have their Reynolds number dependence described explicitly and apply for moderate to very large Reynolds numbers, well above the range of full Navier–Stokes calculations. Understanding the fundamentals of turbulence is expected to lead to more efficient and cheaper air transportation, and better tools for climate prediction and short-term weather forecasting.Read moreRead less
A Novel Approach To Flow Control By Topography. The project will resolve important questions concerning the influence of boundary topography on transition to turbulence and on the exact coherent structures forming the backbone of turbulence.
The canonical topography known from previous work by one of the investigators is a wavy wall and, as well as resolving important issues in flow physics, the research is relevant to many flows of importance such roughness induced transition on aircraft wings, ....A Novel Approach To Flow Control By Topography. The project will resolve important questions concerning the influence of boundary topography on transition to turbulence and on the exact coherent structures forming the backbone of turbulence.
The canonical topography known from previous work by one of the investigators is a wavy wall and, as well as resolving important issues in flow physics, the research is relevant to many flows of importance such roughness induced transition on aircraft wings, flows in heat transfer/mixing devices, blood flow and the influence of topography on the atmospheric boundary layer.
Expected outcomes are an understanding of the interplay between transitional and turbulent flows with wall topography together with strategies to enhance mixing and drag reduction.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE140101546
Funder
Australian Research Council
Funding Amount
$288,900.00
Summary
Development of computer-based optimisation to improve hypersonic aerodynamic design. Next-generation launch vehicles using high-speed jet engines will make it cheaper and more reliable for humankind to engage in activities in space. This project will contribute to the technology of high-speed jet engines by developing optimised air intake systems. The research aims to advance the use of computational engineering and apply this to improve the design of air intake systems. The outcomes of this pro ....Development of computer-based optimisation to improve hypersonic aerodynamic design. Next-generation launch vehicles using high-speed jet engines will make it cheaper and more reliable for humankind to engage in activities in space. This project will contribute to the technology of high-speed jet engines by developing optimised air intake systems. The research aims to advance the use of computational engineering and apply this to improve the design of air intake systems. The outcomes of this project will advance the technology of high-speed jet engines with the goal of replacing existing rocket systems.Read moreRead less
The art of controlling multijet resonance in jet noise and power generation. This project aims to determine the mechanisms by which arrays of high speed jets interact. The project will combine experiments at multiple specialist facilities with analytical approaches to unlock the physics behind both steady and transient behaviour in high-speed multijets. Understanding multijet interaction mechanisms is crucial in the development of more efficient power-generation turbines, and the operation of hi ....The art of controlling multijet resonance in jet noise and power generation. This project aims to determine the mechanisms by which arrays of high speed jets interact. The project will combine experiments at multiple specialist facilities with analytical approaches to unlock the physics behind both steady and transient behaviour in high-speed multijets. Understanding multijet interaction mechanisms is crucial in the development of more efficient power-generation turbines, and the operation of high-speed flight vehicles. Expected outcomes of the project include deep insight into the characteristics of multijet arrays, and the forging of strong links with multiple international research centres. As well as fundamental knowledge, the project will facilitate improved efficiency in gas turbine systems, using pulsed-detonation combustion.Read moreRead less
Catastrophic transition to turbulence in rotation-dominated flows. Rotation-dominated flows are very common in engineering applications and fluid dynamics of the Earth's atmosphere, oceans, and core. Such flows are known to make a sudden transition from an orderly to an energetic turbulent state and this project aims to discover the reason why.
Precision inertial sensing with cold atoms. Many advances in our technology-driven society rely on precision measurement. The project will provide the Australian industrial and government sectors with new and better inertial sensors to measure acceleration, rotation and gravity. The technology will find application in navigation, defence, mineral exploration, earth science and fundamental physics.
Australian Laureate Fellowships - Grant ID: FL120100017
Funder
Australian Research Council
Funding Amount
$3,215,016.00
Summary
Turbulence: physical modelling and application to aquatic ecosystem functions. Turbulent fluid motions in aquatic systems are critical for many aspects of water health. This project will quantify the effects of these motions in an unprecedented way by addressing the long-standing problem of turbulence, and the outcomes will be applicable to the essential task of strengthening Australia’s water security.