Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Combustion modelling"”.
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A unified multi-physics formulation for combustion modelling
… mathematical formulation for the numerical modelling of material response due to detonation wave loading. In particular, we are interested to capture miscible and immiscible behaviour within condensed-phase explosives arising from the co-existence of a reactive carrier mixture of miscible …
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Numerical Modelling of Sooting Laminar Diffusion Flames at Elevated Pressures and Microgravity
… is critical to the development of practical combustion devices, which typically operate at high pressures, and fire suppression systems in space. Flames display significant changes under microgravity and high-pressure conditions as compared to normal-gravity flames at atmospheric pressure, …
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Mathematical modelling of flow and combustion in internal combustion engines
… herein addresses the problem of mathematical modelling of fluid flow and combustion in internal combustion engines. In particular, the investigation of three topics that constitute prime sources of uncertainty, in current numerical models, namely turbulence modelling, inaccuracies in the …
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An investigation to determine the complexity and feasibility of combustion & NOx modelling in modern GTDI engines
… NOx production in a GTDI engine using two zone combustion modelling and a variation of what is typically referred to as the “Zeldovich” model. The investigation assessed 3 collective data sets from two Ford Motor Company EcoBoost engines, their 4-cyl 1.5L and their 3-cyl 1L. With the data …
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Analyses of Bluff Body and Swirl-Stabilised Flames Using Large Eddy Simulation
Premixed and partially premixed lean combustion is utilised in modern gas turbine systems, since an improved efficiency and lower flame temperatures can be achieved, thereby offering reductions in pollutant emissions. The stability of these flames in practical combustion systems, where ubiquitous …
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A study on the flow characteristics of an industrial radiant tube burner
The thesis presents an experimentally validated modelling study of the flow of combustion air in an industrial radiant tube burner (RTB). The RTB is used typically in industrial heat treating furnaces. The work has been initiated because of the need for improvements in burner lifetime and …
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Simulation of Turbulent Flames at Conditions Related to IC Engines
… of computational hardware, methodologies and modelling approaches in recent times make computational uid dynamics (CFD) an important and cost-effective tool for gathering required insights on the in-cylinder ow, combustion and their interactions. Traditional Reynolds-Averaged Navier-Stokes …
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The Role of Swirl in the Flow Structure and Response of Premixed Flames
… challenge with no single solution. Combustion needs to be optimised and lean premixed combustion is an attractive approach to face this challenge. Unfortunately, lean premixed flames are often unstable as they may operate close to the flame blow off limit. Therefore, a suitable …
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Modelling of Spray Combustion with Doubly Conditional Moment Closure
Turbulent spray combustion is characterised by a strong coupling of evaporation, mixing and chemical reaction. This leads to a wide spectrum of combustion regimes, where self-propagating premixed flames and diffusion-controlled non-premixed flames may occur simultaneously within the same flame. The …