F232 Secondary atomization behavior and spray flame characteristics of carbonated W/O emulsified fuel

Abstract

Secondary atomization behavior and spray flame characteristics of carbonated W/O emulsified fuel were studied. An emulsified fuel or carbonated emulsified fuel was injected into a flame stabilized in a laminar counterflow field. Direct photography of the flame using a color high-speed video camera and magnified shadow imaging of spray droplets using a monochrome high-speed video camera were used. As a result, tip position of spray flame became shorter and spray flame was compact when carbonated emulsified fuel was used. This was because dissolved CO_2 enhanced secondary atomization, leading to improvement of fuel vapor ignition at upstream region. Secondary atomization behavior of carbonated emulsified fuel droplet was also observed at upstream region.