Study and analysis of premixed flame dynamics of zero carbon fuel - ammonia
- Authors
- Publication Date
- Nov 14, 2022
- Source
- HAL-Descartes
- Keywords
- Language
- English
- License
- Unknown
- External links
Abstract
In the quest for alternative fuels to mitigate crises like pollution, global warming, depletion of resources, etc, ammonia has emerged as one of the top contenders amongst other green fuels. The goal of this thesis is to provide experimental data and analyses that are useful both to the industry and the scientific community. This work has been divided into 3 parts to meet the set objectives. The first part is dedicated to providing laminar flame speeds, which is an important sizing parameter, at conditions that are encountered in combustors. This section also highlights the chemistry involved and various factors influencing it; explaining some unique behaviour like pressure independency. The second part is an attempt to understand the inner structure of ammonia flames. It is important to understand the response of different species to variations introduced into the parameters which may help enhance various desirable properties. The thickness of ammonia flame and its impact while calculating flame speeds have been pointed out. The effect of curvature on different excited species and the position of the heat release rate has been determined. The final part of this thesis is an extension of the second part. The concentration of some of the excited species is useful in accommodating it in any kinetic scheme and has been given here. It is known that turbulent flames help to improve certain desirable properties. However, turbulent flames are very complex and not easy to analyse. The most simple step would be to study a perturbed flame and so, tests on flame-acoustic interactions have been performed to understand the influence of curvature for ammonia flames. This study is concluded with insights paving paths to new directions in the world of ammonia combustion.
