Deflagration-to-detonation transition in an unconfined space

被引：24

作者：

Koksharov, Andrey ^{[1
]}

Bykov, Viatcheslav ^{[1
]}

Kagan, Leonid ^{[2
]}

Sivashinsky, Gregory ^{[2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Tech Thermodynam, D-76131 Karlsruhe, Germany

[2] Tel Aviv Univ, Sackler Fac Exact Sci, Sch Math Sci, IL-69978 Tel Aviv, Israel

来源：

COMBUSTION AND FLAME | 2018年 / 195卷

基金：

以色列科学基金会;

关键词：

Deflagration-to-detonation transition; Accelerating flames; Thermal runaway of fast flames; SELF-ACCELERATION; NUCLEAR FLAMES; INSTABILITIES; SUPERNOVAE; MIXTURES;

D O I：

10.1016/j.combustflame.2018.03.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Whereas deflagration-to-detonation transition in confined systems is a matter of common knowledge, feasibility of the transition in unconfined space is still a matter of controversy. With a freely expanding self-accelerating spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is indeed possible provided the flame is large enough. The transition is caused by positive feedback between the accelerating flame and the flame-driven pressure buildup, which results in the thermal runaway when the flame speed reaches a critical level. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：163 / 169

页数：7

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