Two-stage ignition and flame stabilisation in engine-relevant conditions. This project aims to reveal the mechanisms of ignition and flame stabilisation in the temperature and pressure conditions that exist in diesel engines, understanding of which is currently very limited despite their significant bearing on pollutants and fuel efficiency. Using massively parallel supercomputing resources, the most detailed, direct numerical simulations of ignition and flame stabilisation to date will be perfo ....Two-stage ignition and flame stabilisation in engine-relevant conditions. This project aims to reveal the mechanisms of ignition and flame stabilisation in the temperature and pressure conditions that exist in diesel engines, understanding of which is currently very limited despite their significant bearing on pollutants and fuel efficiency. Using massively parallel supercomputing resources, the most detailed, direct numerical simulations of ignition and flame stabilisation to date will be performed - they will be three-dimensional and use a detailed chemistry model able to account for low-temperature kinetics and two-stage ignition. Analysis of these data aims to reveal how ignition and flame stabilisation depends on key turbulence and chemical kinetic parameters, thus contributing to developing low-emissions diesel engines.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE110100225
Funder
Australian Research Council
Funding Amount
$600,000.00
Summary
Multi-dimensional, high speed laser imaging facility for fluids and combustion. New high-speed laser diagnostics facilities will be established to enable Australian researchers to perform unique, real time measurements in combustion systems. Such novel capabilities will advance the science of combustion and facilitate the development of design tools for the optimisation of clean and efficient energy conversion devices.
Fuel stratification to enable higher load operation of homogeneous charge compression ignition engines. The project aims to provide knowledge needed to solve a problem impeding the development of an efficient and clean engine concept known as homogeneous charge compression ignition. Fuel stratification using alternative fuels will be studied fundamentally and used to reduce the problematic rapid pressure changes that occur in these engines.
The stabilisation of lifted jet flames in hot oxidiser. The project will contribute fundamental insights on a crucial phenomenon in diesel engines: the detachment of the flame from the fuel nozzle, which strongly affects harmful emissions of nitrogen oxides (NOx) and particulates. Detailed numerical simulations will be used to reveal the mechanism of flame stabilisation, knowledge that will aid the development of cleaner engines.
Development of low emissions compression-ignition engines via ethanol port-injection dual-fuelling. The project aims to develop a more efficient and more cost-effective way of utilising clean-burning ethanol fuel. Port-injection fuelling of ethanol as a separate fuel stream in compression-ignition engines will be studied fundamentally and combined with novel combustion strategies to overcome problems that occur at high ethanol substitution.
The colour of turbulence and the attached eddy hypothesis. This project aims to progress understanding of wall-bounded turbulence. These turbulent fluid flows are ubiquitous in nature and in engineering systems, directly affecting dispersion in the atmosphere and the energy consumption of land, sea and air vehicles. The understanding of these turbulent flows has been limited by a lack of verified theoretical models for the structure of wall turbulence. By combining unprecedented experiments with ....The colour of turbulence and the attached eddy hypothesis. This project aims to progress understanding of wall-bounded turbulence. These turbulent fluid flows are ubiquitous in nature and in engineering systems, directly affecting dispersion in the atmosphere and the energy consumption of land, sea and air vehicles. The understanding of these turbulent flows has been limited by a lack of verified theoretical models for the structure of wall turbulence. By combining unprecedented experiments with a novel dynamical systems approach, this project will enable development of effective turbulence control strategies, enhancing productivity in a wide range of applications. The findings of the research will enable models with predictive capability to design turbulence control schemes.Read moreRead less
Flame-wall interactions in diesel engine environments. This project aims to advance the fundamental understanding of flame-wall interactions in diesel engines, which is currently very limited despite the wall's significant impact on combustion and pollutants. The aim is to perform the most comprehensive set of measurements to date in a high-pressure chamber and optically accessible engine, including planar imaging of key species and soot, and space-/time-resolved measurements of wall temperature ....Flame-wall interactions in diesel engine environments. This project aims to advance the fundamental understanding of flame-wall interactions in diesel engines, which is currently very limited despite the wall's significant impact on combustion and pollutants. The aim is to perform the most comprehensive set of measurements to date in a high-pressure chamber and optically accessible engine, including planar imaging of key species and soot, and space-/time-resolved measurements of wall temperature. These are intended to be complemented by the first transported probability density function modelling of a diesel spray flame that includes soot, radiation and wall heat transfer. The expected outcomes will greatly advance understanding of flame-wall interactions, thus contributing to the development of cleaner and more efficient engines.Read moreRead less
Lower greenhouse at lower cost: maximising the potential of liquefied petroleum gas (LPG) in passenger vehicles. This project will develop tools for designing internal combustion engines that simultaneously achieve low greenhouse emissions without added consumer cost. The project aim is to be achieved through the effective use of liquefied petroleum gas (LPG), which is an affordable fuel that has potentially low emissions if used properly.
Turbulent flow over surfaces with spatially varying roughness. This project aims to improve understanding of the effect of spatial roughness transitions on turbulent flows. Fluids flowing over non-smooth surfaces influence our daily lives, such as water moving through a pipe, wind blowing over the Earth's surface or aircraft moving through air. The presence of surface roughness profoundly influences these flows. Though engineers have learnt to deal effectively with evenly distributed roughness, ....Turbulent flow over surfaces with spatially varying roughness. This project aims to improve understanding of the effect of spatial roughness transitions on turbulent flows. Fluids flowing over non-smooth surfaces influence our daily lives, such as water moving through a pipe, wind blowing over the Earth's surface or aircraft moving through air. The presence of surface roughness profoundly influences these flows. Though engineers have learnt to deal effectively with evenly distributed roughness, this is seldom encountered in reality. Rather, there are abrupt changes in roughness, for example at the edges of wind-farms or at rivets on aircraft. This project aims to investigate these important, but little understood, turbulent flows. Potential benefits include improved simulation, more efficient vehicle design and improved atmospheric and climate models.Read moreRead less
A novel surface preparation for manipulation of turbulent boundary layers. Australia's geographic isolation means that we are unusually dependent on long-haul transportation systems for sustaining our economy. This project seeks to examine novel surface coatings to reduce the drag of large transport systems. A successful outcome would ultimately reduce Australia's fuel costs and environmental footprint.