RESIDUAL REACTIVITY OF BURNED GASES IN THE EARLY EXPANSION PROCESS OFFUTURE GAS-TURBINES

The present study investigates the chemical evolution of the burned ga ses in a first-stage nozzle operated under high infer temperature and pressure conditions as they are foreseen for next-generation high-effi ciency gas turbine machinery. Coupled aero-thermochemical simulation a re performed up to the extreme case of stoichiometric combustion witho ut ulterior dilution. The intent is to provide an estimation of possib le consequences arising from the residual reactivity of gases downstre am from the combustor. These consequences might affect the future desi gn of the expansion path in order to render nonstationary chemistry co mpatible with aerodynamics, energetics, and environmental aspects.