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SHORT COMMUNICATION

Ignition Delay of Coal Particles in Shock-Heated Air

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Pages 241-245 | Received 30 Nov 1976, Accepted 20 Sep 1977, Published online: 09 Jun 2010
 

Abstract

The objective of this study is to obtain the ignition delay for Pittsburgh seam coal particles shock heated in air to various temperatures and I atmosphere pressure. The ignition delay for coal particles of 19 μ and 41 μ was determined in a 7.62 cm shock tube. The gas temperature behind the reflected shock wave, T 5, was calculated from the measured incident shock-wave speed. Plots or the ignition dealy vs. T 5indicate the existence of a minimum gas temperature for ignition. The effect of particle size on the ignition delay is small for the particle size range used.

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