22 April 2006 Monitoring of inhomogeneous flow distributions using fibre-optic Bragg grating temperature sensor arrays
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Abstract
Knowledge of the gas flow distributions, their mass velocity and turbulences, in chemical reactors, thermodynamic engines, pipes, and other industrial facilities may help to achieve a more efficient system performance. In our novel approach, optical fibre Bragg grating (FBG) sensors have been used for measuring the temperature of a heated element, adapting the principles of conventional hot-wire-anemometers. Because of the multiplexing capability of FBG sensors, the gas mass flow distribution can be measured along the sensor array. The length of the heated and sensor-equipped element can be easily adapted to the cross section of the gas flow, from <10 cm up to several metres. The number and distances of FBGs distributed over this length defines the spatial resolution and is basically limited by the sensor signal processing. According to FBG sensor lengths < 5 mm, spatial resolutions of gas flow measurements of less than 1 cm can be achieved.
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Ines Latka, Thomas Bosselmann, Wolfgang Ecke, Michael Willsch, "Monitoring of inhomogeneous flow distributions using fibre-optic Bragg grating temperature sensor arrays", Proc. SPIE 6189, Optical Sensing II, 61892G (22 April 2006); doi: 10.1117/12.668899; https://doi.org/10.1117/12.668899
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