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Advances in measuring techniques for turbine cooling test rigsSurface temperature distribution measurements for turbine vanes and blades were obtained by measuring the infrared energy emitted by the airfoil. The IR distribution can be related to temperature distribution by suitable calibration methods and the data presented in the form of isotherm maps. Both IR photographic and real time electro-optical methods are being investigated. The methods can be adapted to rotating as well as stationary targets, and both methods can utilize computer processing. Pressure measurements on rotating components are made with a rotating system incorporating 10 miniature transducers. A mercury wetted slip ring assembly was used to supply excitation power and as a signal transfer device. The system was successfully tested up to speeds of 9000 rpm and is now being adapted to measure rotating blade airflow quantities in a spin rig and a research engine.
Document ID
19720022597
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pollack, F. G. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1972
Subject Category
Facilities, Research, And Support
Report/Patent Number
NASA-TM-X-68100
E-7016
Meeting Information
Meeting: Symp. on Instrumentation for Airbreathing Propulsion
Location: Monterey, CA
Country: United States
Start Date: September 19, 1972
End Date: September 21, 1972
Accession Number
72N30247
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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