Combustion of jatropha curcas oil on perforated burner

Jatropha curcas oil premixed combustion behavior on perforated plate has been studied experimentally. The results showed that both of perforated and secondary flames were formed in very lean mixture with maximum laminar flame velocity (SL) higher than that of hexadecane and almost similar with that of ethanol flame. Slight increase of equivalent ratio (Ø) causes drastic decrease of SL of perforated and secondary flame and SL reaches minimum at Ø = 0.355 where the physic of flame change into open tip Bunsen and triple flame. Above Ø = 0.365, SL of open tip Bunsen flame relatively constant much lower than that of hexadecane flame at around stoichiometry. Small explosions occur due to ambient air intervention attributed to unsaturated fatty acid components of Jatropha curcas which reaches 55% of the overall composition. Without ambient air intervention perforated flames experienced lift off at Ø = 0.355 to 0.375, perforated and secondary flame are stable at Ø = 0.387 to 0.467, and from Ø = 0.489 to 0.585 the flame becomes cellular in the form of island and petal. Above Ø = 0.632 the flame become very unstable. Keyword: Bunsen flame with open tip; Cellular flame; Laminar burning velocity; Perforated flame; Triple flame