Study of Steam Injection Effect on Course of Combustion Processes in Combustion Chamber of Gas Turbine Unit

This article shows the results of a study that assesses the effect of steam injection into the combustion chamber on the operating parameters of a ground-based power plant. The object of the research was the gas turbine unit of the AL-31STE type, which is a converted aircraft engine. The studies were performed using numerical simulation, and the results were compared with studies by a number of scientists. The parameters of the combustion chamber and the flow parameters at the exit from it were evaluated. The calculated variants differed among themselves by the value of the relative flow rate of the injected vapor, which varied in the range from 0 to 0.04. The type of dependencies of emissions of nitrogen and carbon oxides, the total gas temperature at the outlet of the combustion chamber and the efficiency of fuel combustion from the relative steam consumption are revealed. The steam injection's effect on the rate of formation of nitric oxide and the oxidation rate of carbon monoxide is analyzed. According to the environmental and economic characteristics of the installation, the optimum value of the relative consumption of injected steam was found.