Accession Number : ADP005539

Title :   Turbine Rotor Blade Measurements Using Infrared Pyrometry,

Corporate Author : TECHNISCHE HOCHSCHULE AACHEN (GERMANY F R) INST FUER STRAHLANTRIEBE UND TURBOARBEITSMASCHINEN

Personal Author(s) : Koschel,W. ; Salden,D. ; Hoch,T.

Report Date : NOV 1986

Pagination or Media Count : 16

Abstract : An infrared pyrometer system has been developed for the noncontacting measurement of metal temperatures on turbine rotor blades. The system with a high bandwidth ratio, a small target size and a high signal-to-noise ratio meets the requirements for the accuracy of temperature measurements to be performed on small gas turbines running at high speeds. The system set-up is described and special features of the probe head design, the lay-out of the detector/amplifier unit and the signal processing are discussed in detail. Results of the automated calibration of an infrared pyrometer system concerning the influence of variations in the target-to-lens distance, in the lens stop diameter and in the observation angle on the detector signal output are reported. Some results of temperature measurements obtained for the cooled rotor blades of a small research turbine are presented.

Descriptors :   *RADIATION PYROMETERS, GAS TURBINE BLADES, ROTOR BLADES(TURBOMACHINERY), METALS, INFRARED DETECTORS, CALIBRATION, AUTOMATION, SIGNAL PROCESSING, WEST GERMANY

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE