Explosion tests were performed for CH 4/O 2/N 2 mixtures in a non-adiabatic 5L cylindrical vessel. Experiments were run for mixtures with stoichiometric CH 4/O 2 ratio, changing the oxygen air enrichment factor, E=O 2/(O 2+N 2), from 0.21 (air) to 1 (pure oxygen). Oscillating pressure time histories with over-adiabatic peaks (up to 240bar) have been measured. The oscillating behaviors can be attributed to the occurrence of cycles of condensation and vaporization of the water produced during combustion. Such cycles culminate in the rapid phase transition of the condensed water, leading to the over-adiabatic pressure peaks. © 2011 The Combustion Institute.
Anomalous behavior during explosions of CH 4 in oxygen-enriched air / DI BENEDETTO, Almerinda; Francesco, Cammarota; Valeria Di, Sarli; Ernesto, Salzano; Russo, Gennaro. - In: COMBUSTION AND FLAME. - ISSN 0010-2180. - 158:(2011), pp. 2214-2219. [10.1016/j.combustflame.2011.03.015]
Anomalous behavior during explosions of CH 4 in oxygen-enriched air
DI BENEDETTO, ALMERINDA;RUSSO, GENNARO
2011
Abstract
Explosion tests were performed for CH 4/O 2/N 2 mixtures in a non-adiabatic 5L cylindrical vessel. Experiments were run for mixtures with stoichiometric CH 4/O 2 ratio, changing the oxygen air enrichment factor, E=O 2/(O 2+N 2), from 0.21 (air) to 1 (pure oxygen). Oscillating pressure time histories with over-adiabatic peaks (up to 240bar) have been measured. The oscillating behaviors can be attributed to the occurrence of cycles of condensation and vaporization of the water produced during combustion. Such cycles culminate in the rapid phase transition of the condensed water, leading to the over-adiabatic pressure peaks. © 2011 The Combustion Institute.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
