Abstract

Abstract An experimental study of combustion characteristics and structure of interacting 2, 3, and 5 propane jets in a cross flow is presented. The separation distance between the burners was set at 8, 12, and 16 exit diameters. The ratio of jet momentum flux to cross flow momentum flux was varied over a range of 44-390. Flame length, blowout stability, temperature, radiation emission, and concentrations of CO, NO, and O2 are measured. The effects of number of jets, their separation distance, and their geometrical arrangement relative to cross flow, on flame length, radiation and stability characteristics are examined. The changes in the radial profiles of temperature, and concentrations of CO, O2, and NO are studied as functions of separation distance and ratio of jet momentum flux to cross flow momentum flux of 3-jet flames. The range between the upper and lower stability limits of the jet velocity of lifted flames in cross flow is higher for multiple-jet flames than for single-jet flames. A third limi...

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