ID 9

Study on Evaporation Behavior of Jet-A Surrogate Fuel Spray Entered in High Temperature Region Formed by Methane/air Flat Flame in Counterflow Field

 

Abstract:

Experimental investigation on the evaporation characteristics of surrogate fuel have been conducted because it is possible to be a reasonable validation data for computational fluid dynamics of conventional fuel spray flame. However, the knowledge regarding the transient evaporation of surrogate fuel droplet, which has a droplet size utilized in the range of practical combustor, during the combustion is still limited. In this study, laser di-agnostics (ILIDS; Interferometric Laser Imaging for Droplet Sizing) with high-speed camera had been applied to the spray flame stabilized in the laminar counterflow field to obtain the time evolution of diameter of fuel drop-let in the spray combustion field. In addition, the evaporation coefficient of surrogate fuel of kerosene was ex-amined. The result shows that evaporation behavior of fuel droplets agrees with the D-square law even in a counterflow flame field with the spray combustion. On one hand, it is found that the evaporation coefficient of surrogate fuel showed good agreement with that of kerosene under the condition of high number density of fuel droplets. On the other hand, the evaporation coefficient of surrogate fuel over predicted the evaporation charac-teristics of kerosene under the condition of low number density of fuel droplets.