Miniature fiber optic pressure sensors for turbomachinery applications

William N. MacPherson, James M Kilpatrick, James S. Barton, J. D C Jones

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Development of pressure sensor for the instrumentation of experimental aerodynamic facilities has traditionally concentrated on electrical techniques. Such transducers have temporal and spatial resolutions that are currently insufficient to provide the accurate measurement of turbulent flows behind turbine rotor stages, for example. We present result obtained in a turbine test rig form a simple fiber optic pressure sensor based upon the interferometric response of an extrinsic cavity formed between the interrogation fiber and a reflective diaphragm. We discuss the design trade-offs, optical interrogation and temperature sensitivity of such a configuration, and demonstrate the success of the design in small-scale shock tube experiments. We then describe the application of the sensor in a full scale turbine test facility.

Original languageEnglish
Pages (from-to)283-292
Number of pages10
JournalProceedings of SPIE - the International Society for Optical Engineering
Publication statusPublished - 1998
EventLaser Interferometry IX: Techniques and Analysis - San Diego, CA, United States
Duration: 20 Jul 199820 Jul 1998


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