Investigations on an Experimental Air-Cooled Turbine PartⅠ.—General Description of Turbine and Experimental Technique PartⅡ. Cooling Characteristics of Blades having a Multiplicity of Small Diameter Coolant Passages

摘要

Tests on internally air-cooled turbine blades operating under realistic conditions are required to determine (a) the degree of cooling achievable and (b) the effects of cooling on the overall turbine performance. This requirement has led to the manufacture and installation of an experimental air-cooled turbine specially designed for testing internally air-cooled nozzle and rotor blades. This part of the report records a general description of the turbine, the first set of cooled blades to be tested, and the associated instrumentation. It also records some results of early tests made to check the cooling of the turbine structure (excluding blades).