Flow patterns upstream of a continuous transversal vertical sill in a rectangular channel are explored by means of laboratory experiments. Transition between different flow conditions is analysed. Pressures are measured at several points on the sill upstream face by means of piezometers. Axial local pressures have been recorded also by means of piezo-resistive differential transducers. In general, time-averaged local pressures compare well with measurements taken by means of piezometers. The mean axial pressure acting on the sill is computed from local time-averaged pressures, measured by the two methodologies. The dependence of this space-averaged pressure on mean flow parameters is studied. An equation is also presented for axial time-averaged local pressures.
Statistical characteristics of pressure fluctuations over sills in stilling basins
CIGADA, ALFREDO;GUADAGNINI, ALBERTO;ORSI, ENRICO MARIA
1996-01-01
Abstract
Flow patterns upstream of a continuous transversal vertical sill in a rectangular channel are explored by means of laboratory experiments. Transition between different flow conditions is analysed. Pressures are measured at several points on the sill upstream face by means of piezometers. Axial local pressures have been recorded also by means of piezo-resistive differential transducers. In general, time-averaged local pressures compare well with measurements taken by means of piezometers. The mean axial pressure acting on the sill is computed from local time-averaged pressures, measured by the two methodologies. The dependence of this space-averaged pressure on mean flow parameters is studied. An equation is also presented for axial time-averaged local pressures.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
