The Calibration of Cylindrical Hot-Film Velocity Sensors

[+] Author and Article Information
E. L. Andreas

School of Oceanography, Oregon State University, Corvallis, Oregon 97331

J. Appl. Mech 46(1), 15-20 (Mar 01, 1979) (6 pages) doi:10.1115/1.3424489 History: Received August 01, 1977; Revised August 01, 1978; Online July 12, 2010


Ten hot-film velocity sensors with aspect ratios near 20 were calibrated for Reynolds numbers from 1 to 18. This calibration required investigating the yaw angle dependence of the sensors and determining a zero-wind Nusselt number, N 0 , for each. Conduction heat losses to the sensors supports vary from sensor to sensor and, thus, affect both the velocity calibration and the zero-wind Nusselt numbers. Nevertheless, because these losses are velocity independent, with knowledge of N 0 their effects can be eliminated from the heat transfer relation for small aspect ratio hot-films.

Copyright © 1979 by ASME
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