Study of Impingement Heat Transfer with Rough Surfaces.
CINCINNATI UNIV OHIO DEPT OF AEROSPACE ENGINEERING
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The effects of surface roughness on impingement cooling of a gas turbine blade were determined experimentally. The study was conducted in a heated flow two-dimensional cascade tunnel. Results showed that roughening of the impingement surfaces decreased the cooling effectiveness from that of a smooth surface in an optimal cooling configuration. However, the roughened surfaces increased the cooling effectiveness over that of a smooth surface in a nonoptimal configuration. Author
- Jet and Gas Turbine Engines