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A new approximate expression for the response of a hot-wire anemometer

Published online by Cambridge University Press:  21 April 2006

Michio Nishioka  and
Masahito Asai
Michio Nishioka
Affiliation:
Department of Aeronautical Engineering, University of Osaka Prefecture, Sakai, Osaka, 591 Japan
Masahito Asai
Affiliation:
Department of Aeronautical Engineering, University of Osaka Prefecture, Sakai, Osaka, 591 Japan
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Abstract

Bruun's (tabulated) universal function for the response of a hot-wire anemometer is examined in detail to see if the function has some unique relationship with King's law. As a result of the analysis, an approximate expression is derived and proposed for the response over a wide range of wind speeds. Although the expression is like King's law with an additional correction term and is thus quite simple in form, it agrees with Bruun's universal function (and also with the derivative, i.e. the velocity sensitivity) to within 3% over the range of wind speeds from 2 to 120 m/s. There is little doubt that the proposed response equation may serve as a helpful guide in calibrating a hot-wire probe, in constructing a simple linearizer circuit of high accuracy, and in linearization by means of a computer.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 190 , May 1988 , pp. 113 - 119
Copyright
© 1988 Cambridge University Press

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References

Bruun, H. H. 1971a Interpretation of a hot-wire signal using a universal calibration law. J. Phys. E: J. Sci. Instrum. 4, 225.Google Scholar
Bruun, H. H. 1971b Linearization and hot-wire anemometry. J. Phys. E: J. Sci. Instrum. 4, 815.Google Scholar
Bruun, H. H. 1976 A note on static and dynamic calibration of constant-temperature hot-wire probes. J. Fluid Mech. 76, 145.Google Scholar
Champagne, F. H., Sleicher, C. A. & Wehrmann, O. H. 1967 Turbulence measurements with inclined hot-wires, Part 1. Heat transfer experiments with inclined hot-wire. J. Fluid Mech. 28, 153.Google Scholar
Collis, D. C. & Williams, H. J. 1959 Two-dimensional convection from heated wires at low Reynolds numbers. J. Fluid Mech. 6, 357.Google Scholar
Freymuth, P. 1978 A bibliography of thermal anemometry. TSI Q. 4 (4), 3.Google Scholar
Hinze, J. O. 1959 Turbulence, McGraw-Hill.
King, J. O. 1914 On the convection of heat from a small cylinder in a stream of fluid: determination of the convection constant of small platinum wires with application to hot-wire anemometry. Phil. Trans. R. Soc. A 214, 373.Google Scholar
Nishioka, M. & Sato, H. 1974 Measurements of velocity distributions in the wake of a circular cylinder at low Reynolds numbers. J. Fluid Mech. 65, 97.Google Scholar
Perry, A. E. 1982 Hot-Wire Anemometry. Clarendon.
Tanaka, E. 1974 Some remarks on hot-wire anemometer technique (in Japanese). JSME 77, 82.Google Scholar
Webster, C. A. G. 1962 A note on the sensitivity of yaw of a hot-wire anemometer. J. Fluid Mech. 13, 307.Google Scholar