Rotating Heat Transfer Measurements on a Multi-Pass Internal Cooling Channel: II — Experimental Tests

Abstract

The present contribution is focused on heat transfer measurements on internal cooling channels of a high pressure gas turbine blade in static and rotating conditions.A

Rotating Heat Transfer Measurements on a Multi-Pass Internal Cooling Channel: I — Rig Development

“…The rig and test procedure have been successfully commissioned with tests on a three pass model. The details can be found in another contribution to ASME Turbo Expo 2016 [11].…”

“…The values of The=+5 and -15°C referenced in the figure are the temperature of the flow at the exit of the cooling system and at the beginning of the test /end of the pre-cooling phase and they will continue to lower during the test phase. They have been used to successfully test a multi pass channel with liquid crystals with activation temperatures of 12°C and 2°C [11].…”

“…the lamps are quite far away from the surface and inclined). An aluminum struts frame integral with the rotating arms allows light positioning for different test section geometries and according to the above requirements (see [11] for more details). Data storage is another consideration in the selection of the vision system.…”