D344 対向流場における液滴群の燃焼

概要

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An experiment study was performed of the cloud combustion characteristics of counterflow diffusion Flames in which polydisperse n-heptan and n-octan sprays carried by a nitrogen stream from the lower duct, burnt in oxidizer streams from the upper duct. The distance between the ducts was varied to vary the strain rate with constant fuel flow rate, so that the upstream spray characteristics were independent of the strain rate. The burning behavior of the spray is observed by high speed camera and the oxygen concentration at extinction was determined as a function of the strain rate. The flat blue diffusion flame was observed between two ducts, which is supported by vaporization of small droplets. Relatively large droplets penetrate the flat blue flame and continue to burn on the oxidizer side with an envelope flame surrounding each single droplet. The burning behaviors were discussed based on the observation effect.
日本流体力学会の論文
2001-07-31