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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Research on Film Cooling of a Rotating Turbine Blade by Using Low Speed Turbine Test Facility

Get access (open in a dialog) DOI: 10.1615/IHTC12.400
6 pages

要約

Film cooling tests have been conducted by using stationary cascade and low speed rotating turbine test facility. A mass-heat transfer analogy is applied to measure film cooling effectiveness. In this study, carbon dioxide was used for the tracer and measured the concentration of carbon dioxide in the fluid sucked at the holes downstream on the film cooling holes by chromatography. Two-dimensional trajectory of film cooling air on the blade surface is also visualized and measured byAmmonia Ozalid method.
The film cooling effectiveness on suction surface of the rotating blade fits well with that on the stationary blade, but a low level of effectiveness appears on the pressure surface of the rotating blade. Especially, a triangular region, where the coolant is swept from the suction surface by passage vortex system and film cooling effectiveness decreases to 0, exists near tip and hub section.