Hot-film sensors calibration drift in water

Jiménez, Juan J.; Martínez‐Val, Rodrigo; Rebollo, Manuel Rebollo

doi:10.1088/0022-3735/14/5/010

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…Yet the process of calibrating a hot-film has always been a lengthy and somewhat cumbersome undertaking. Calibration drift due to temperature effects and probe-surface contamination is considerable for hot-films in liquids -much more so than for hot-wires in gases (Jimenez et al 1981). In the course of taking measurements, it is essential then that calibration be performed often (every 20-30 rain) to account for this drift.…”

Section: Introductionmentioning

confidence: 99%

In-situ swinging arm calibration for hot-film anemometers

Zabat

Browand

Plocher

1992

Experiments in Fluids

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A method of calibration for hot-film anemometers is presented. A swinging arm that moves under the influence of gravity serves as both a calibration mechanism and a probe support. The velocity of the probe is found by differentiating the angular position history of the arm and multiplying it with the arm length. Limitations on the quality of calibration data while the arm is accelerating are discussed. The hot film voltage output is then matched to the velocity to find the two constants in King's law. The calibration was tested by taking velocity profile measurements in a laminar boundary layer. The results of these compared well to the Blasius profile.

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Section: Introductionmentioning

confidence: 99%