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Applied Optics

Applied Optics


  • Vol. 35, Iss. 24 — Aug. 20, 1996
  • pp: 4905–4912

Diode laser-based air mass flux sensor for subsonic aeropropulsion inlets

Michael F. Miller, William J. Kessler, and Mark G. Allen  »View Author Affiliations

Applied Optics, Vol. 35, Issue 24, pp. 4905-4912 (1996)

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An optical air mass flux sensor based on a compact, room-temperature diode laser in a fiber-coupled delivery system has been tested on a full-scale gas turbine engine. The sensor is based on simultaneous measurements of O2 density and Doppler-shifted velocity along a line of sight across the inlet duct. Extensive tests spanning engine power levels from idle to full afterburner demonstrate accuracy and precision of the order of 1–2% of full scale in density, velocity, and mass flux. The precision-limited velocity at atmospheric pressure was as low as 40 cm/s. Multiple data-reduction procedures are quantitatively compared to suggest optimal strategies for flight sensor packages.

© 1996 Optical Society of America

Original Manuscript: November 27, 1995
Revised Manuscript: March 21, 1996
Published: August 20, 1996

Michael F. Miller, William J. Kessler, and Mark G. Allen, "Diode laser-based air mass flux sensor for subsonic aeropropulsion inlets," Appl. Opt. 35, 4905-4912 (1996)

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