Abstract
We examine extremely nonuniform separated water flow in the initial segment of a penstock of rectangular section resulting from the separated flow past a two-dimensional gate. The meansquare deviations p', one-dimensional frequency spectra S(ω), spatial correlations r(x), and distribution functions F(p) of the pressure pulsation are determined experimentally at points of the solid stationary boundary above the roll zone for significantly different absolute pressures in the stream. Changes in the structure of the hydrodynamic action on the boundary resulting from phase transformations in the fluid—the appearance of air and air-vapor inclusions—are noted. The measurement data are compared with the results of theoretical calculations.
Published Version
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