The dependence of hot-wire calibration on gas temperature at low reynolds numbers

Koppius, A. M.; Trines, G.R.M.

doi:10.1016/0017-9310(76)90177-0

Cited by 13 publications

(2 citation statements)

References 7 publications

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“…Low-speed hot-wire calibrations (0.154.9 m/s) were performed in the exit plane of a fully developed laminar pipe flow by a method similar t o the one used by Manca, Mastrullo & Mazzci (1988) and Koppius & Trines (1976). The calibration results of the pipe flow method were checked in the wind tunnel by obtaining shedding frequency measurements of the parallel shedding mode.…”

Section: Experimental Methodsmentioning

confidence: 99%

The onset and development of circular-cylinder vortex wakes in uniformly accelerating flows

Lee

Budwig

1991

J. Fluid Mech.

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The influence of uniform flow acceleration on the stability and the characteristics of circular-cylinder wakes over a Reynolds-number range, 20 < R < 330, was investigated. Experiments were performed to examine the temporal evolution of the wake before, during, and after the onset of the wake instability. We have demonstrated in several ways that the wake is stabilized by flow acceleration: (i) the onset of the wake instability occurs at larger Reynolds numbers than in the steady flow case, (ii) the closed wake develops to states that would be unstable in a steady flow, and (iii) once vortex shedding does occur there is a reduction in instantaneous Strouhal number. We have also examined the temporal growth rate of the wake instability and find that it is directly proportional to the applied flow acceleration. Physical mechanisms are proposed to describe the experimental observations.

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Section: Experimental Methodsmentioning

confidence: 99%

The onset and development of circular-cylinder vortex wakes in uniformly accelerating flows

Lee

Budwig

1991

J. Fluid Mech.

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“…Obviously, a drift of ambient fluid temperature T a changes a calibration curve I 2 (U n ). It is always possible to perform a velocity calibration at a number of different fluid temperatures [29]. It is the most accurate and the most reliable approach.…”

Section: Theoretical Basis and Philosophy For Measurementsmentioning

confidence: 99%