Abstract
Abstract In the present study, the characteristics of three-inline non-premixed Oxy-Methane turbulent flame jets, with Methane jet at the center and two Oxygen jets on either side, are computationally investigated. For all the jets, the velocity is varied from 10.13 m/s to 108 m/s. It is found that, in the presence of central jet, the mixing of lateral jets are delayed further downstream. In contrast, the central jet diffuses at a faster rate. At far-field locations, all the jets merge with each other and form a single jet, which can be seen from the uniformity of the radial velocity distribution. The turbulent intensity is found to be more at the jet periphery, where jets interact with the surrounding fluid. The temperature of the flame is found to be higher at the periphery of the methane and the oxygen jets, due to the existence of most appropriate equivalence ratio. Also, the flame lift-off height is found to be increasing with the jet velocity. The concentration of methane is reduced along the streamwise direction due to the penetration of combustion products towards the jet centerline.
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