Gas Turbine Combustor Modelling with and without Nozzle Guided Vanes - Phase II

摘要

The combustor and turbine are two major components of a gas turbine engine, which are directly connected and coupled. However, in practice, to reduce turn-around time in the development of gas turbine engines and to avoid numerical difficulties, simulations of combustors are often performed without turbine components attached. The purpose of the present work is to investigate the effect of nozzle guide vanes (NGVs) on combustor flow fields, and it is a continuation of the previous study on this issue. The two-phase, turbulent, compressible, reacting flow fields of a conventional gas turbine combustor with and without NGVs have been resolved. Qualitative and quantitative analyses of the numerical results indicate that the NGVs have strong effect on the combustor flow field at two-, three- and six-spans upstream of the NGV leading edge, particularly for the Mach number and temperature distributions. These findings suggest that for accurate numerical simulation of gas turbine combustors, the NGVs should be included in the computational domain in general.