Measurements of the Evaporation Behavior of the Film of Fuel Blends

Paper #:
  • 2018-01-0290

Published:
  • 2018-04-03
Abstract:
Fuel film was formed in the intake port or on the surface of the piston crown in the internal combustion engine because of the fuel spray impinges. The formation of the film affects the mixing process of the air and the fuel, and the process of the combustion propagation. These problems lead to the increase of the pollutant emissions and the reduction of the engine performance. So, it is meaningful to improve the understanding of the combustion and evaporation behavior of the film. Some models have been developed to predict the evaporation behavior of the film, but rare experimental results have been reported, especially when the temperature is high. In this study, the evaporation behavior of the film of different species of oil and their blends at different temperature have been observed. The films of isooctane, 1-propyl alcohol, 1-butanol, 1-pentanol and their blends were placed on a quartz glass substrate in the closed temperature-controlled chamber. The shape change of the film during evaporation was monitored by a high-speed camera through the window of the chamber. Firstly, the binary blends film of isooctane and one of he other three oils were evaporated at room temperature, 50 ℃ and 90 ℃. Secondly, the pure films of isooctane, 1-propyl alcohol, 1-butanol and 1-pentanol were evaporated at 90 ℃. Finally, the evaporation data of the film was processed with the Matlab software. The thickness change and the evaporation rate in the evaporation duration were obtained by the analysis of the Matlab.
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