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Optical Tip Clearance Measurements as a Tool for Rotating Disk Characterization.

Iker García1, Joseba Zubia2, Josu Beloki3,4

  • 1Department of Communications Engineering, E.T.S.I. of Bilbao, University of the Basque Country UPV/EHU, Alda. Urquijo s/n Bilbao 48013, Spain. iker.garciae@ehu.eus.

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|January 19, 2017
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Summary

This study used optical fiber sensors to measure the vibrational behavior of a rotating aircraft engine disk model. The innovative technique accurately characterized disk vibrations, aiding in the design of an upgraded prototype.

Keywords:
nodal diameteroptical fiber sensorrotating disktip clearancevibration measurement

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Area of Science:

  • Mechanical Engineering
  • Aerospace Engineering
  • Experimental Mechanics

Background:

  • Rotating disks, such as those in aircraft engines, are susceptible to vibrations.
  • Understanding vibrational behavior is crucial for performance and safety.
  • Simulating operational conditions is necessary for accurate analysis.

Purpose of the Study:

  • To experimentally investigate the vibrational behavior of a rotating disk model.
  • To evaluate the effectiveness of optical fiber sensors for vibration measurement.
  • To inform the design of an upgraded aircraft engine disk prototype.

Main Methods:

  • Utilized three optical fiber sensors to measure disk tip clearance.
  • Simulated aircraft engine conditions using a wind tunnel.
  • Determined vibration parameters: amplitude, frequency, and nodal diameters.
  • Validated results with a strain gauge.

Main Results:

  • Successfully characterized the vibrational parameters of the rotating disk.
  • Optical fiber sensor data closely matched strain gauge measurements.
  • Demonstrated the suitability of optical fiber sensing for disk vibration analysis.

Conclusions:

  • Optical fiber sensing is a viable and accurate technique for evaluating rotating disk vibrations.
  • The study provided data for the design of an improved disk prototype.
  • This method offers a novel approach to non-contact vibration monitoring.