Large-Scale Computation of Direct Initiation of Cylindrical Detonations

Abstract
We investigate the direct initiation of cylindrical detonations in free space by performing large-scale computations on a supercomputer. The two-dimensional (2D) compressible reactive Euler equations with a one-step chemical reaction model are solved by a well-validated upwind CE/SE scheme using up to 1.6 billion mesh points. Numerical results imply that one-dimensional (1D) approaches can only interpret the direct initiation mechanism of stable detonations. Inherent multi-dimensional instabilities have a significant influence on the direct initiation of unstable detonations. On one hand, multi-dimensional instabilities make the detonation more unstable and increase the risk of failure of the detonation. On the other hand, the collision of transverse waves generated from multi-dimensional instabilities leads to the initiation of local overdriven detonations that can enhance the overall self-sustainability of the global process. The competition between these two effects is an important mechanism to interpret the direct initiation of multi-dimensional detonations.

Citation
Shen, H., & Parsani, M. (2019). Large-Scale Computation of Direct Initiation of Cylindrical Detonations. 31st International Symposium on Shock Waves 2, 61–67. doi:10.1007/978-3-319-91017-8_8

Acknowledgements
The authors are thankful for the computing resources of the Supercomputing Laboratory and the Extreme Computing Research Center at King Abdullah University of Science and Technology.

Publisher
Springer International Publishing

Conference/Event Name
31st International Symposium on Shock Waves, ISSW 2017

DOI
10.1007/978-3-319-91017-8_8

Additional Links
http://link.springer.com/10.1007/978-3-319-91017-8_8

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