Flame Characteristics of Vaporized Renewable Fuels and Their Blends with Petroleum Fuels - Novel Combustion Concepts for Sustainable Energy Development - page 294

Fig. 1 Diagram of experimental setup

vaporize the injected fuel and low enough to prevent coking in the feed lines. The
heated line was long enough (230 cm) to ascertain that the liquid fuel was com-
pletely vaporized in the air stream before exiting the burner. The liquid fuel was
delivered to the heated air (supplied from a compressed air tank) through a high-
temperature silica-based septum with a 50-cm 3 -capacity syringe attached to a syr-
inge pump. A periodic examination of the tube walls indicated the absence of any
coking. Also, experiments with an air/fuel ratio analyzer indicated that the entire
mass

flow of liquid fuel injected into the heated air stream exited the burner in
vapor state (based on the carbon balance). The volume

fl

fl flow rate of air was mon-

itored using a calibrated rotameter. The fuel air mixture was ignited at the exit of

-

the burner with an external propane pilot fl flame which was removed after ignition.