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An experimental study of turbulent flows over compliant surfaces

โœ Scribed by R.J. Hansen; D.L. Hunston

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
793 KB
Volume
34
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

The interaction of a turbulent boundary layer with a compliant surface is studied experimentally in a rotating disk geometry. A hydroelastic instability, in the form of a wave structure in the compliant surface-liquid interface, develops when the quotient (free stream fluid velocity) x (square root of the liquid density)](square root of the shear modulus of the compliant material) exceeds a critical value. Below this critical condition surface compliance does not affect the flow in any measurable way, whereas above it the skinfriction drag is significantly increased. Explanations for these observations are offered on the basis of photographic and visual studies of the wave structure and a theoretical treatment of the interaction of an inviscid fluid with a compliant surface.

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