Gas-phase spontaneous ignition of hydrocarbons View Full Text


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Article Info

DATE

2012-07

AUTHORS

A. A. Borisov, N. M. Rubtsov, G. I. Skachkov, K. Ya. Troshin

ABSTRACT

The ignition of hydrocarbons at low temperatures is experimentally studied in a rapid-mixture-injection static reactor. The ignition process was monitored using a high-speed color video camera. It was found that, at low temperatures, ignition starts in kernels, a feature also characteristic of methods for measuring the ignition delay time at high and medium temperatures (shock tube, rapid compression machine). Kernel-mode ignition is associated with gas-dynamic phenomena inherent in different techniques of heating the gas to the desired temperature. Ignition in the kernel is of chain-thermal nature. The emergence of a visible kernel can be considered the beginning of hot flame propagation. It is shown that, in the self-ignition mode, the propagation of the flame front from the initial kernel occurs by the induction mechanism, proposed by Ya.B. Zel’dovich, rather than by the diffusion-heat-conduction mechanism. Introduction of a platinum wire into the reactor produces a catalytic effect in the negative temperature coefficient region, while virtually unaffecting the ignition delay at lower temperatures. More... »

PAGES

517-522

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1990793112080040

DOI

http://dx.doi.org/10.1134/s1990793112080040

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1024618472


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