The Heavy Type Numerical Simulationof Combustion Characteristics Of Gas Turbine Engine

This paper analyzes the research status of heavy duty gas turbine both at home and abroad. The annular tube combustor geometric structure model of components including diffuser, cyclone and combustor are built by using UG software. Therefore, the coupling combustion process and combustion performance of fuel oil are numerical simulated and analyzed. Realizable k-ε turbulence model is used for simulating gas phase turbulence flow and the Lagrange random walk model is used for simulating the random motion of atomized fuel oil particle and the EDC multistage reaction model is used for simulating the interaction of combustion reaction and turbulence. SIMPLE algorithms in which pressure and velocity are coupled and second upwind discrete scheme are adopted in numerical calculation. Two-phase turbulence-combustion regularity under3kinds of relative loads and its effect on main combustion property like turbulence flow structure, combustion temperature field, combustion efficiency and total pressure recovery are calculated and analyzed. Radial outlet temperature quality under different power is discussed.Burning pollutant of this heavy duty gas turbine is also simulated by calculating NOx, COx and soot in this paper. Coking on the wall is proposed based on the relationship between soot and wall temperature. A new viewpoint is put forward on the calculation of the wall’s capture of soot and the position where soot integrated producing.The calculated theoretic data are compared with experimental data by searching and reading of papers. Some precious theoretical foundation is offered for the development and reconstruction of heavy duty gas turbine by analysis on the difference between theoretic and experimental data.