A software package for computing CJ-deflagrations propagating in vented tubes

Abstract

This software package reflects the work done by the authors in their investigation on Chapman-Jouguet (CJ) deflagrations, propagating in vented tubes. In the studied configuration, tubes are open at their rear wall, where the flame originates. As a result, fast CJ deflagrations are expected to propagate with a shock wave ahead of them, which strength is directly dependent on the rear wall opening area. Assuming both the shock and the flame are discontinuities across which conservation of mass, momentum and energy applies, a simple double discontinuity problem can be posed. The present software solves this problem. It is coupled with the library CANTERA, to calculate the states across each discontinuities, accounting for realistic thermal and chemical gas properties. Details on the method are published under the authors name in Combustion and Flame (2023) : "Model for Chapman-Jouguet deflagrations in open ended tubes with varying vent ratio".