No abstract

The use of turbine cooling in gas-turbine engines can offer many performance benefits but, at the same time, it may result in added complication to the engine. The advantages that turbine cooling can offer to the engine designer and the results of some of the research that has been expended on the cooling of gas-turbine engines are discussed.

More endurance testing is needed to establish mechanical reliability. 4 Rotating instrumentation yielded useful information on bucket-strut temperatures. 5 There is no evidence of cooling-passage clogging. 6 The design procedure is adequate and will be used again for future designs. 7 Manufacturing and inspection techniques, developed during this program, make possible low-cost production of this type blading.

No abstract

Turbine cooling, originally developed because of a shortage of heat-resistant alloys, is of interest for certain applications to permit operation of gas-turbine engines above uncooled temperatures. Specific power output would be increased, and in some cases specific fuel consumption decreased, depending on the engine type. Progress is reported on developments since 1952.