Static and dynamic calibrations of constant-temperature hot-wire systems
- 14 May 1971
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 47 (4), 765-777
- https://doi.org/10.1017/s0022112071001356
Abstract
The conventional hot-wire static calibration procedure for the measurement of absolute turbulence intensities with constant-temperature hot-wire anemometers is investigated and serious errors are found. An alternative calibration procedure is developed which involves shaking the wire at low frequencies in a uniform flow. A series of tests indicate that this dynamic calibration method is more accurate and consistent than the conventional procedure. A method for verifying various calibration procedures is demonstrated. This method involves the measurement of velocity perturbations in a series of Karman vortex streets. The velocity perturbation amplitude is held fixed, but the frequency varies from one vortex street to another. This method also acts as a direct check of the hot-wire system frequency response.Keywords
This publication has 3 references indexed in Scilit:
- A study of the constant-temperature hot-wire anemometerJournal of Fluid Mechanics, 1971
- Hot Wire Anemometer Measurements in Flows Where Direction of Mean Velocity Changes during a TraverseIEEE Transactions on Instrumentation and Measurement, 1969
- Two-dimensional convection from heated wires at low Reynolds numbersJournal of Fluid Mechanics, 1959