EXPERIMENTAL INVESTIGATION OF THE COOLING CHARACTERISTICS OF TRANSPIRATION AIR-COOLED TURBINE BLADES IN A HIGH TEMPERATURE GAS CASCADE
CURTISS-WRIGHT CORP QUEHANNA PA
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An experimental investigation was conducted on a transpiration air cooled stator cascade to evaluate the heat transfer characteristics, to observe the temperature patterns, and to verify the existing transpiration cooling theory for hot gas streams ranging in temperature from 1600 to 2050 F. A total of 49 hours and 55 minutes of cascade testing were logged. Hot gas Reynolds numbers computed at ten span-wise positions on the blade varied between 7800 on the pressure side near the leading edge and 288,000 at the convex side just upstream of the trailing edge. Hot gas weight flows of 2.46 lbsec and 1.64 lb sec were directed at the cascade section. A comprehensive analysis of the data accumulated along with detailed descriptions of the test facility, the component test hardware, and the problems associated with instrumentation is presented.
- Jet and Gas Turbine Engines