In project 7, ignition caused by turbulent free jets of hot gas impinging into a fuel/air mixture is investigated. This is done by numerical simulations using a statistical approach to treat turbulence and turbulence/chemistry interactions, and by experiments which are used to create empirical data which help to assess the accuracy of the numerical simulations. During the project, the numerical models underlying the simulations will be continuously refined, so that finally an improved simulation tool with higher predictive capabilities than currently possible will result. In this process, there will also better insight into the detailed processes in hot jet ignition be gained.
In detail, a probability density function (PDF) method will be used for treating the turbulent jet and its interaction with the surrounding fuel/air mixture. A full transport equation for the joint PDF of velocity and scalars will be solved. To describe chemical reactions, already existing reduced models will be used.
Measurements in free jets mixing with quiescent surrounding air will be performed using laser-based techniques. To isolate effects of missing and of reaction, two kinds of experiments will be performed, namely inert mixing of a low-density jet (helium) with nitrogen, as well as a reacting configuration with a hot jet of combustion products impinging into a fuel/air mixture.
The model development will profit from the input of project 1 (Physical and chemical models for ignition processes) and project 6 (DNS).
Project leader | Dr.-Ing. Robert Schießl |
Co-applicant | Dr.-Ing. Detlev Markus |
PhD student | Franziska Seitz |
Articles: | |
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13. | Combustion Theory and Modelling 19 (2), 188--222 (2015) |
12. |
Proceedings of the Combustion Institute
2 (35), 2191–2198
ISSN: 1540-7489
(2015)
|
11. | Combustion Science and Technology 186 (10-11), 1582-1596 (2014) |
10. | Flow Turbulence Combust. 86, 45-62 (2011) |
9. | Proc. Combust. Inst. 31, 719-726 (2006) |
Conferences: | |
8. |
Proceedings of the European Combustion Meeting -- 2015
, page P4-02.
2015
978-963-12-1257-0
|
7. |
Proceedings of the European Combustion Meeting -- 2015
, page P4-06.
2015
978-963-12-1257-0
|
6. |
25th International Colloquium on the Dynamics of Explosions and Reactive Systems
Leeds, IK
2015
|
5. |
10th International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions
2014
|
4. |
Proceedings of the European Combustion Meeting – 2013
, page 5pp.
June
2013
978-91-637-2151-9
|
3. |
24th International Colloquium on the Dynamics of Explosions and Reactive System
Taipei, Taiwan
2013
|
2. |
2013
|