Abstract
Abstract Water (or possibly some other liquid coolant) is sprayed directly onto the rotor blades of a gas turbine from orifices in tubes located near the trailing edge of the turbine-nozzle guide vanes. The liquid impinges on the rotor blades forming a layer which serves both to insulate the blade from the hot-gas stream and to extract heat from the blade. Results of experiments on a supercharger, with gas temperatures between 1150 and 2350 F, and theoretical studies of the effect of spray cooling on cycle efficiency indicate that spray cooling, by permitting higher gas temperatures, should increase both output and efficiency of a gas-turbine power plant. Heat transfer in a spray-cooled blade is discussed.
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