The efficiency and specific power of the steam injected gas turbine is anal
ysed by modelling the thermodynamic cycle. In this model special attention
is paid to the blade cooling. The basic cycle as well as cycles with improv
ements such as intercooling, heat recovery by regenerator and blade cooling
using steam are studied. The different cycles are compared with the combin
ed cycle and the intercooled regenerative cycle. The conclusion is that the
steam injected cycles have high efficiency and specific power. Adding heat
exchangers to the cycle is not beneficial. Using steam as coolant for the
blades offers interesting perspectives. Copyright (C) 2000 John Wiley & Son
s, Ltd.