Calibration of Constant-Temperature Hot-Wire Anemometers at Low Velocities in Water with Variable Fluid Temperature

[+] Author and Article Information
K. Hollasch

Harrison Radiator Div., General Motors Corp., Lockport, N. Y.

B. Gebhart

Department of Mechanical Engineering, Cornell University, Ithaca, N. Y.

J. Heat Transfer 94(1), 17-22 (Feb 01, 1972) (6 pages) doi:10.1115/1.3449863 History: Received January 18, 1971; Online August 11, 2010


Calibration of hot-wire probes operated in a constant-temperature mode in water at low velocities is discussed. Operation under circumstances where natural convection effects are important is considered. A method of calibrating a constant-temperature hot-wire probe for variations in fluid temperature is presented. The method consists of varying wire overheat during calibration at a constant fluid temperature. A relation is derived analytically relating anemometer output with a variable overheat resistance to anemometer output with fluid temperature variations. An experimental study to verify the analysis is presented.

Copyright © 1972 by ASME
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