The piston–flow interaction as a model for the deflagration-to-detonation transition

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• 作者：Irina Brailovsky ; Leonid Kagan ; Gregory Sivashinsky
• 关键词：Piston– ; flow interaction ; Deflagration-to-detonation transition ; Flame-piston analogy
• 刊名：Combustion and Flame
• 出版年：2011
• 出版时间：January 2011
• 年：2011
• 卷：158
• 期：1
• 页码：42-47
• 全文大小：1036 K

文摘

The piston–flow interaction induced by a piston pushing hydraulically resisted gas through a long tube is discussed. It is shown that the hydraulic resistance causes a significant precompression and preheating of the gas adjacent to the piston’s edge. In the case of an explosive premixture this development may lead to a localized autoignition triggering detonation. It is suggested that the problem may serve as a guide for understanding the deflagration-to-detonation transition in tubes, with the piston modeling the impact of the advancing flame.