Journal article
Analysis of pressure oscillations and wall heat flux due to hydrogen auto-ignition in a confined domain
X Dou, M Talei, Y Yang
Physics of Fluids | Published : 2023
DOI: 10.1063/5.0133045
Abstract
This study investigates the impact of the near-wall temperature gradient on hydrogen auto-ignition characteristics using one-dimensional (1D) fully resolved simulations. Ten cases are simulated, one featuring normal combustion and the other nine simulating auto-ignitive combustion with different initial pressures, equivalence ratios, and near-wall temperature gradients. The simulations show that the near-wall temperature gradient greatly affects the onset and intensity of the auto-ignition event. For cases with the initial conditions of 833.3 K and 15 bar, a small near-wall temperature gradient delays the timing of auto-ignition and places the auto-ignition kernel further away from the wall,..
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Awarded by National Computational Infrastructure
Funding Acknowledgements
The authors acknowledge the generous support of the European Centre for Research and Advanced Training in Scientific Computation (CERFACS, http://www.cerfacs.fr), in providing the authors with the source code for NTMIX-CHEMKIN. Mohsen Talei acknowledges the support of the Australian Research Council through the DECRA Fellowship (No. DE180100416). The research benefited from computational resources provided through the National Computational Merit Allocation Scheme and the Pawsey Energy and Resources Scheme, supported by the Australian Government. The computational facilities supporting this project included the Australian NCI National Facility and the Pawsey Supercomputing Centre. Xinbei Dou acknowledges the financial support of the China Scholarship Council.