航空機を利用した超臨界雰囲気中における燃料液滴燃焼現象の解明

概要

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An experimental study has been made of the evaporation, autoignition and combustion of a single fuel droplet in supercritical gaseous environments under microgravity during the parabolic flight of airplane. A video camera was provided to observe the behavior of the fuel droplet. The fuel tested was octadecanol which solidifies at 331 K, and critical conditions of which are 1.4 MPa and 747 K. The experiments were done in the quiescent gaseous environments at low oxygen concentration to reduce the soot yield in the flame and to make it possible to observe the backlighted image of the droplet. The ignition delay and the burning time showed minirag at the ambient pressure approximately equal to the critical pressure of the fuel. The burning rate constant determined from the time histories of the droplet diameter showed a peak at ambient pressure 1.4 times as high as critical pressure of the fuel.
社団法人日本機械学会の論文
1999-03-25