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The effect of electronic components on the cut-off frequency of the hot-wire system

Li, Jun-de (2005) The effect of electronic components on the cut-off frequency of the hot-wire system. Measurement Science and Technology, 16 (3). pp. 766-774. ISSN 0957-0233

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The analytical solution for the frequency response of a constant temperature hot-wire system at given turbulent velocity fluctuations is used to investigate the effects on the cut-off frequency of the hot-wire system at different operating conditions. It is found that the optimal frequency response of the hot-wire system determined by the traditional square-wave test, under certain circumstances, cannot guarantee the stability of the hot-wire system from velocity perturbations. It is also found that the cut-off frequency depends not only on the hot-wire length to diameter ratio, the mean velocity, the hot-wire materials and the overheat ratio as previously found, but also on the gain bandwidth product of the amplifiers in the feedback circuit, the resistances used in the Wheatstone bridge and the gain of the amplifier in the feedback loop. Hot-wire systems with preferred operating conditions are recommended.

Item Type: Article
Uncontrolled Keywords: cut-off frequency, hot-wire anemometers, turbulent measurements
Subjects: Historical > RFCD Classification > 290000 Engineering and Technology
Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Depositing User: Ms Phung T Tran
Date Deposited: 02 Mar 2009 12:19
Last Modified: 05 Jul 2011 23:45
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Citations in Scopus: 11 - View on Scopus

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