High-precision anemometer with thermal wave
- Strata Mechanics Research Institute, Polish Academy of Sciences, uleja Reymonta 27, 30-112 Cracow (Poland)
A new, highly accurate method of measurement of the gas flow velocity has been developed. The method employs the phenomenon of propagation of thermal waves in flowing gas. The probe consists of three thin wires. One of these is a hot wire and it is used to generate a thermal wave while the two remaining wires are used for wave detection. Since the phase shift of the wave between two points is proportional to the wave frequency, the flow velocity can be derived from the slope of the regression line. Signals from the wave detectors are sent via an analog to digital converter to the computer and processed. We report measurements of the laminar flow with the velocity between 30 and 200 cm/s. The accuracy of the velocity measurements is about 0.2 cm/s.
- OSTI ID:
- 20853662
- Journal Information:
- Review of Scientific Instruments, Vol. 77, Issue 9; Other Information: DOI: 10.1063/1.2338260; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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