Institute for Thermal Energy Technology and Safety (ITES)

Flame acceleration and DDT

As a main task, current criteria for flame acceleration (FA) and deflagration to detonation transition (DDT) are empirical correlations based on experiments with tube-like geometry and homogeneously pre-mixed systems (implemented in GASFLOW-MPI).

However, another example of study of DDT is the flame acceleration and DDT in thin layer geometry. Motivated by the potential application in the safe design of fuel cell stack housings, the problem of flame acceleration (FA) and following deflagration-detonation transition (DDT) in a narrow geometry was studied, as well as the influence of flexible walls. Experimentation in the HYKA Test Chamber Q160 showed that, experimental conditions had a great influence in the presence of flame quenching, slow oscillating flames, fast sonic flames, DDT and detonation propagation.