Accession Number : AD0787318

Title :   Design, Fabrication, and Demonstration of a Miniaturized Tip Clearance Measuring Device.

Descriptive Note : Final rept. Jul 73-Apr 74,

Corporate Author : PRATT AND WHITNEY AIRCRAFT WEST PALM BEACH FLA FLORIDA RESEARCH AND DEVELOPMENT CENTER

Personal Author(s) : Ford,M. J. ; Hildebrand,J. R. ; Prosser,J. C.

Report Date : SEP 1974

Pagination or Media Count : 80

Abstract : This report describes the design, fabrication, and demonstration of a miniaturized turbine blade tip clearance measurement system for use with small gas turbine engines during engine operation. This system was originated by Pratt and Whitney Aircraft and uses laser light that is focused on the blade tips. The light reflected from the blade tips is imaged onto an output device. The relationship between the change in tip clearance and the change in position of the output light spot provides a direct indication of tip clearance. (Modified author abstract)

Descriptors :   *GAS TURBINES, *TURBINE BLADES, *CLEARANCES, *MEASURING INSTRUMENTS, OPTICAL DETECTION, OPTICAL EQUIPMENT COMPONENTS, LASERS, PROBES, FABRICATION

Subject Categories : Test Facilities, Equipment and Methods
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE