Author(s): Davide Borsani; Enrico Larcan; Stefano Mambretti; Enrico Orsi
Linked Author(s): Enrico Larcan, Enrico Orsi
Keywords: Step; Pressure fluctuations; Statistical analysis
Abstract: Designing adequate protection for stilling basins characterised by a positive step on the bottom requires the knowledge of the acting forces. Laboratory tests have been performed, sampling pressure values (with a 100 Hz frequency and a 15 min duration) on the vertical axis of the positive step positioned in a rectangular flume where supercritical flow takes place. The first four statistical moments of recorded pressure time series are analysed with the aim of characterising the pressure field as a function of flow characteristics. Some empirical relationships are proposed to describe mean and standard deviation of local pressure as a function of few significant parameters.
Year: 2001