Effects of Interjet Spacing on Burning Multiple Sprays

Abstract

pattern, and minimization of pollutant formation are possible. The physico-chemical processes, in terms of size, shape, atomization, evaporation, and burning characteristics of multiple spray e ames, depend upon the mutual interaction of individual jets and the effects of surrounding airstream. In the present study three cone gurations, namely,1-jet,2-jets,and 3-jetsarrangedin a line, wereused.Jet-Afuelwastheliquid.Identicaltwin-e uidair-assist atomizers were employed. Four interjet spacings, a/d = 18.5, 24.7, 30.9, and 37, where a was the distance between thejets andd was the atomizerexit diameter, wereemployed to study theeffectsof interjet spacing. Measurements included e ame length, e ame merging length, e ame liftoff height, droplet size distribution, e ame temperature, and major species concentrations. The transverse proe les in the near-nozzle region and the far-burner regions are presented. With an increase in interjet spacing, the amount of oxygen penetration through the space between the jets increases and leads to higher far-burner temperature, lower soot emission, and higher production of carbon