A simple laser-heated thermocouple anemometer

A simple laser-heated thermocouple anemometer A device based on the principle of hot wire anemometry but which employs a fine, laser-heated thermocouple as its sensor, is described. Its steady-state thermal equilibrium as a function of gas stream velocity is analysed theoretically and calibrated experimentally. Transient behaviour is then studied from heating/cooling curves, derived from photographic records of oscilloscope traces, obtained by switching the laser on/off at various flow velocities. This allows calculation of thermal inertia and elucidates its trade off against robustness of the sensor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

A simple laser-heated thermocouple anemometer

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Publisher
Springer-Verlag
Copyright
Copyright © 2003 by Springer-Verlag
Subject
Engineering
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-003-0678-x
Publisher site
See Article on Publisher Site

Abstract

A device based on the principle of hot wire anemometry but which employs a fine, laser-heated thermocouple as its sensor, is described. Its steady-state thermal equilibrium as a function of gas stream velocity is analysed theoretically and calibrated experimentally. Transient behaviour is then studied from heating/cooling curves, derived from photographic records of oscilloscope traces, obtained by switching the laser on/off at various flow velocities. This allows calculation of thermal inertia and elucidates its trade off against robustness of the sensor.

Journal

Experiments in FluidsSpringer Journals

Published: Oct 25, 2003

References

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