Flame temperature analysis in the oxycut process using acetylene gas: a numerical study

Abstract

To cut metals, the oxycut process uses a preheating flame, usually composed of oxygen and a combustible gas, in addition to a flame-independent jet of oxygen. In the present work, the partially premixed combustion model of a finite volume-based software was applied to analyze the flame temperature in a cutting tip of acetylene. At the torch inlet boundary, the flow rates of oxygen and acetylene were adjusted to sweep a wide range of fuel-oxygen ratio. The results pointed a peak surrounding the stoichiometric ratio, at 3106 °C for the literature and 2650.93 °C for the numerical model, contrasting a deviation of 14.65%. The maximum temperature occurs at 52.38% of oxygen volume for the literature and 50.03% for the model, a difference of 2.35 percentage points only. It is concluded that the results of the numerical approach attained the ends of the research.

Dynamic mesh analysis by numerical simulation of internal combustion engines

“…For each time step a total number of 50 iterations was consid-ered. Figure 3 illustrates the valves motion profile during the entire engine cycle for the engine from The turbulent intensity (TI) is defined by Lam et al (2012), Basse (2019) and Silva et al (2020)as the ratio between the root mean square (RMS) of the fluctuation velocity (u') and the mean flow velocity (u avg ), as defined by Equation 10.…”