Large-Scale Computation of Direct Initiation of Cylindrical Detonations

Hua Shen, Matteo Parsani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.
Original languageEnglish (US)
Title of host publication31st International Symposium on Shock Waves 2
PublisherSpringer International Publishing
Pages61-67
Number of pages7
ISBN (Print)9783319910161
DOIs
StatePublished - Apr 3 2019

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