Yang, W;
Yao, T;
Chen, Y;
Luo, KH;
(2019)
Auto-ignition in turbulent combustion of hydrogen/air mixing layer at high pressure.
In:
Proceedings of the 12th Asia-Pacific Conference on Combustion (ASPACC 2019).
Asia-Pacific Conference on Combustion (ASPACC): Fukuoka, Japan.
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Abstract
The present work investigates the dynamic process of autoignition and extinction of flame kernels in a hydrogen/air mixing layer at a pressure of 30 atm. Direct numerical simulation (DNS) is conducted to solve the unsteady compressible flow equations coupled with reduced chemistry and detailed transport. The evolution of ignition kernels is tracked and analysed, focusing on the differences between successful and failed kernels. Parameters such as the temperature, heat release rate, scalar dissipation rate, convective and diffusive heat fluxes are calculated to provide quantitative information about ignition kernel development. The convective and diffusive heat fluxes in the successful and failed cases show marked differences. Finally, chemical explosive mode analysis (CEMA) is conducted to provide additional information.
| Type: | Proceedings paper |
|---|---|
| Title: | Auto-ignition in turbulent combustion of hydrogen/air mixing layer at high pressure |
| Event: | 12th Asia-Pacific Conference on Combustion (ASPACC 2019) |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.combustionsociety.jp/aspacc19/ |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10085639 |
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