Jahresbericht 2005 - IPHT Jena

2.2.13 Monitoring of inhomogeneous flow
distributions using fibre-optic Bragg
grating temperature sensor arrays
(I. Latka, W. Ecke)
In many industrial facilities like chemical reactors,
thermodynamic engines, pipes and others, complex
flow distributions occur. Knowledge of the
gas flow distributions may help to achieve an efficient
system performance.
In our approach, fibre Bragg grating (FBG) sensors
have been used for measuring the temperature
of a heated element, in our case a steel capillary,
which is cooled according to the surrounding
mass flow. Because of the multiplexing capability
of FBG sensors, one can measure the temperature
distribution, i.e., the spatial distribution
of the gas mass flow 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