This paper reviews the basic researches of high temperature turbines. These researches include: the performance estimation of a turbo-fan engine with an air-cooled turbine; the relation between the spanwise distribution of cooling effectiveness and the life of the air-cooled turbine blade; experiments of film cooling on the leading edge and on the reduction of unsteady thermal stress in the air-cooled turbine blade; and a new construction of the air-cooled turbine blade. Also discussed are the two-dimensional cascade tests of air-cooled turbine blades by the low-speed and high-speed wind tunnels. Full-scale tests for the high temperature turbine including aerodynamic and thermodynamic investigations of air-cooled axial flow turbines are shown.

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