Gas turbine with heat-insulating lining

A gas turbine which includes a combustion chamber means, a gas turbine inlet means, a diffusor means disposed at an outlet of the gas turbine, an external metallic supporting housing means including wall parts for enclosing the combustion chamber means, the gas turbine inlet means, and diffusor means, and heat insulating inner lining means disposed at least in an area of the combustion chamber means, characterized in that the heat insulating inner lining means is formed of a gas-permeable porous material consisting essentially of an elastic fiber-ceramic composite material, means are provided for mounting the lining means on the wall parts at a predetermined distance from the wall parts so as to define a sealed air distribution space between the lining means and associated wall parts, said mounting means including a multitude of spacers between the inner side of the wall parts facing the lining means and the associated lining means, and in that means are provided for communicating the air distribution space with an air source, whereby air may be forced through the insulating lining in a direction opposite to heat flux from said combustion chamber means thereby producing a forced convective return transport of heat into the combustion chamber means.