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Abstract

Velocities of air flowing between two discs were measured with a hot-wire anemometer where flow was induced with a steam ejector. Inward and outward flow were found to be unsteady, but outward flow unsteadiness was greater. This is due to the diffusion nature of the flow.

A solution to the cylindrical wave equation was obtained and showed that, within the assumptions of the equation, a steady radial flow field becomes unstable upon passage of a wave due to a step function change of velocity at the boundaries of the flow.

Comparison of a power spectrum of recorded data with one of turbulent air flow in a pipe showed the oscillations to be dissimilar. Unsteady motions seen in other studies of radial flow are also discussed.

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References

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Unsteady Air Flow between Two Discs at Low Velocity

Abstract

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References