The ignition of gases by local sources

Proceedings of the Symposium on Combustion Pub Date : 1948-01-01 DOI:10.1016/S1062-2888(65)80020-X

H.G. Landau

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引用次数: 1

Abstract

When energy is released by a local source such as an electric spark in a combustible gaseous mixture, it is assumed to heat instantaneously a small volume and also to create active particles, chain carriers, which diffuse through the gas and increase in number by chain-branching processes at a rate proportional to their concentration. The heat-producing reaction proceeds at a rate proportional to concentration of active particles. Taking as a criterion for ignition the requirement that the temperature at the point of ignition shall never decrease, the following condition for ignition is obtained: $A = \frac{4 (T_{1} - T_{0}) k}{Q n_{0} R^{2}}$ must be less than or equal to a value depending on α, the relation being given in Fig. 1.

The significance and applicability of this result are discussed.

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由局部来源点燃的气体

当能量由一个局部源(如可燃气体混合物中的电火花)释放时，假定它能瞬间加热一小体积，并产生活性粒子，即链载体，它们在气体中扩散，并通过链分支过程以与其浓度成比例的速率增加数量。产热反应的进行速度与活性粒子的浓度成正比。以点火点温度不降低作为点火判据，得到点火条件:a =4(T1−T0)kQn0R2必须小于或等于一个依赖于α的值，关系如图1所示。讨论了这一结果的意义和适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the Symposium on Combustion

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