High frequency temperature fluctuations measurements with a constant current thermoanemometer
Abstract
The design and operation of an experimental technique devised to measure high frequency temperature fluctuations are described. The technique is based on the reaction of a constant current thermoanemometer sensor wire to temperature fluctuations of known amplitude and frequency. It is applied to the calculation of time-constant values and the evaluation of hot-wire amplitude-frequency characteristics. In order to evaluate the amplitude-frequency characteristics of a sensor operating in a constant current regime the ratio between the function of a voltmeter signal attenuation and the amplitude-frequency characteristics of the generating wire is estimated. The equation for calculating the time-constant values is provided.
- Publication:
-
IN: Measurement techniques in heat and mass transfer (A87-12201 02-35). Washington
- Pub Date:
- 1985
- Bibcode:
- 1985mthm.book..385L
- Keywords:
-
- Anemometers;
- Flow Measurement;
- Temperature Measurement;
- Turbulent Flow;
- Amplitudes;
- High Frequencies;
- Instrumentation and Photography