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Proceedings Paper

Optical condensation measurement in gas turbine engine inlets
Author(s): Jason Potter; Ralph P. Tatam
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Paper Abstract

A non-intrusive optical system for the measurement of air inlet condensation in gas turbine engines is presented. The system uses a technique in which a linear relationship between the liquid water content (LWC) and the optical extinction coefficient exists. The extinction coefficient was determined by measuring the extinction of a 10.6 micrometers CO2 laser beam due to Mie scattering from water droplets and the LWC calculated from the linear relationship. Results of the extinction coefficient determined with the system used in a single transmission path mode on a condensing flow occurring in the inlet of a subsonic suction tunnel are presented together with the temperature rise of the ambient air calculated from the extinction coefficient. A rise of 8.65 degrees K was obtained at 0.65. Mach, for an ambient temperature of 20 degrees C and relative humidity 49 percent, which is consistent with previous non-optical measurements.

Paper Details

Date Published: 21 November 1997
PDF: 12 pages
Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); doi: 10.1117/12.279751
Show Author Affiliations
Jason Potter, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 3172:
Optical Technology in Fluid, Thermal, and Combustion Flow III
Soyoung Stephen Cha; James D. Trolinger; Masaaki Kawahashi, Editor(s)

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