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Presentation of an Experimental Approach for the Determination of Mean Velocity in Oscillating Tube Flows Via Hot Wire Anemometry

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Puni tekst: engleski pdf 1.218 Kb

str. 41-48

preuzimanja: 408



The utilization of constant temperature anemometry (CTA) system for the
measurement of mean oscillating velocity of air at negligible compressibility
is discussed in this paper. The measurements were conducted at a station of
self-excited oscillations in a circular cross sectional pipe following the collapse
of the elastic test tube of a Starling resistor in a flow Reynolds number range
of 7,000 ≤ Re ≤ 94,000. The cross-sectional traverse of the hot-wire probe at
the measurement station in a frequency (f) range of 13Hz ≤ f ≤ 107Hz were
conducted. The cross sectional oscillating velocity profile was determined
by using the ensembled averages of oscillating velocity data. The position of
the hot-wire probe corresponding to the mean axial oscillating velocity was
determined to be approximately 0.755 of pipe radius from the centreline in the
covered ranges of Re and f.

Ključne riječi

Hot wire anemometry; Mean oscillating velocity; King’s law; Probe position; Unsteady pipe flow

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