Abstract

The dynamic response of constant resistance anemometer systems is related to the thermal equilibrium of the probe during unsteady changes in surface cooling and also to the characteristics of the feedback system which supplies the heating current. This maintains the probe resistance and average temperature at approximately constant values. In this paper the thermal equilibrium and feedback equations are combined, taking account of the inductance of the probe cables, to derive the governing equation for the unsteady probe current. The probe inductance raises the order of this equation from first to second.

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