Accession Number:

ADA022617

Title:

Study of Impingement Heat Transfer with Rough Surfaces.

Descriptive Note:

Technical rept.,

Corporate Author:

CINCINNATI UNIV OHIO DEPT OF AEROSPACE ENGINEERING

Personal Author(s):

• McFarland,E.
• Tabakoff,W.

Report Date:

1975-08-01

Pagination or Media Count:

33.0

Abstract:

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

Descriptors:

• *HEAT TRANSFER
• *SURFACE ROUGHNESS
• *COOLING
• *GAS TURBINE BLADES
• TWO DIMENSIONAL FLOW
• IMPINGEMENT

Subject Categories:

• Thermodynamics
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE