Limits and mechanism of detonation re-initiation behind a multi-orifice plate

作者：Khomik S V^*; Veyssiere B; Medvedev S P; Montassier V; Olivier H

来源：Shock Waves, 2012, 22(3): 199-205.

DOI：10.1007/s00193-012-0358-y

• Detonation
• Re-initiation
• Perforated plate
• Concentration limit

An experimental investigation was performed to establish the dependence of concentration limits of detonation re-initiation behind a multi-orifice plate on mixture composition and initial pressure for hydrogen-air mixtures. The experiments were carried out in detonation tubes of diameter 106 and 141 mm, separated by a multi-orifice plate into two sections. The tubes were equipped with pressure gauges and a semi-cylindrical smoked plate. It is shown that initial pressure has strong influence on the value of concentration limit, especially for lean hydrogen-air mixtures. On the basis of soot records it can be inferred that re-initiation occurs due to two different mechanisms that depend on the mixture sensitivity and properties of the multi-orifice plate.

• 出版日期2012-5