Ecological After-Effects Numerical Modelling under Methane Combustion

Increases in atmospheric methane concentrations are highly correlated with increases in population and human-related activities that release methane to the atmosphere. At about 70% of the total emissions are from anthropogenic sources and only 30% are from natural sources. Methane is a major component of the natural gas and one of significant anthropogenic sources of the atmospheric methane is it’s leakage during natural gas and oil producing, processing and distributing. The catastrophic example is the gas break from the layer. In order to reduce global ecological after-effects the gas gusher is to be ignited. But the methane-air mixtures burning produces some toxic substances as CO, unburned hydrocarbons, NO x and hence leads to significant ecological problems itself. Mathematical modelling seems to be a good instrument for estimating the picture of the environment contamination under methane combustion. Though combustion is primarily a chemical process followed by the substance’s conversion, the analysis of the chemical reactions can’t provide good estimation of the transformation’s velocities. Combustion processes in many practically important cases are controlled by dynamic factors as diffusion, heat losses and the other. The reaction mechanism selection depends on the pressure and the density ranges under consideration and the objective of the modelling. Hundreds reactions with very strong temperature coupling for tens (more than 30) constituents are necessary to estimate realistic NO x formation under methane combustion. In the whole, the problem is rather sophisticated due to the large number of species involved and complex flow geometry. Various approaches may be used to minimise the computational costs.