Row-of-holes film cooling of a convex and a concave wall at low injection angles

Row-of-holes film cooling of a convex and a concave wall at low injection angles

Film cooling effectiveness data are presented against a backdrop of ammonia-diazo flow visualizations for row-of-holes injection along a convex wall and a concave wall at angles of 15, 25, and 45 degrees to the mainstream and at density ratios of approximately one and two. The condition of the local...

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Veröffentlicht in:Climatic change 1994-01, Vol.28 (4), p.15-29
Hauptverfasser: Goldstein, Richard J, Stone, Laurence D
Format: Artikel
Sprache:eng
Schlagworte:
Boundary layer flow
Cooling
Flow interactions
Flow visualization
Gas turbines
Jets
Optimization
Vortex flow
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Zusammenfassung:Film cooling effectiveness data are presented against a backdrop of ammonia-diazo flow visualizations for row-of-holes injection along a convex wall and a concave wall at angles of 15, 25, and 45 degrees to the mainstream and at density ratios of approximately one and two. The condition of the local boundary layer, the severity of jet lift-off, and the strength of vortex interactions among the bound vortices of neighboring jets are key considerations in interpreting the data.
ISSN:0165-0009