In this paper, a technique is presented for the detrmination of turbine rotor bade tip-to-stationary shroud clearance requirements utilizing fiber optics. To accomplish these tip clearance determinations, special rub pins were installed in the turbine shrouds, or tip-shoes, of a 10,000-hp engine. A test procedure was created based upon a transient dimensional analysis, and a cooled borescope and camera were developed. The clearances are presented from a series of successive engine tests.
Turbine Blade Tip Clearance Measurement Utilizing Borescope Photography
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Chandler, AL, & Finkelstein, AR. "Turbine Blade Tip Clearance Measurement Utilizing Borescope Photography." Proceedings of the ASME 1978 International Gas Turbine Conference and Products Show. Volume 1B: General. London, England. April 9–13, 1978. V01BT02A063. ASME. https://doi.org/10.1115/78-GT-164
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