Miniature fiber optic pressure sensors for turbomachinery applications

William N. MacPherson; James M. Kilpatrick; James S. Barton; Julian D. C. Jones

doi:10.1117/12.312947

30 June 1998 Miniature fiber optic pressure sensors for turbomachinery applications

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

Proceedings Volume 3478, Laser Interferometry IX: Techniques and Analysis; (1998) https://doi.org/10.1117/12.312947
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

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.

Citation Download Citation

William N. MacPherson, James M. Kilpatrick, James S. Barton, and Julian D. C. Jones "Miniature fiber optic pressure sensors for turbomachinery applications", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); https://doi.org/10.1117/12.312947

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